Art exhibition
Encyclopedia
Art
exhibitions are traditionally the space in which art objects (in the most general sense) meet an audience
. The exhibit is universally understood to be for some temporary period unless, as is rarely true, it is stated to be a "permanent exhibition". In American English, they may be called "exhibit", "exposition" (the French word) or "show". In UK English, they are always called "exhibitions" or "shows", and an individual item in the show is an "exhibit".
Such expositions may present pictures, drawing
s, video, sound, installation, performance, interactive art or sculpture
s by
individual artists, groups of artists or collections of a specific form of art.
The art works may be presented in museum
s, art halls, art clubs or
private art galleries
, or at some place the principal business of which is not the display or sale of art, such as a coffeehouse
. An important distinction is noted between those exhibits where some or all of the works are for sale, normally in private art galleries, and those where they are not. Sometimes the event is organized on
a specific occasion, like a birthday, anniversary or commemoration.
exhibitions, in particular there is a distinction between commercial and non-commercial exhibitions. Temporary museum exhibitions typically display items from the museum's own collection on a particular period, theme or topic, supplemented by loans from other collections, mostly those of other museums. They normally include no items for sale; they are distinguished from the museum's permanent displays, and most large museums set aside a space for temporary exhibitions. Exhibitions in commercial galleries are often entirely made up of items that are for sale, but may be supplemented by other items that are not. Typically, the visitor has to pay (extra on top of the basic museum entrance cost) to enter a museum exhibition, but not a commercial one in a gallery. Retrospective
s look back over the work of a single artist; other common types are individual expositions or "solo shows"
, group expositions, or expositions on a specific theme or topic. The Biennale
is a large exhibition held every two years, often intending to gather together the best of international art; there are now many of these. A travelling exhibition
is another category of art exhibition.
Exhibitions of new or recent art can be juried, invitational, or open.
, open to the public from 1737, rapidly became the key factor in determining the reputation, and so the price, of the French artists of the day. The Royal Academy
in London, beginning in 1769, soon established a similar grip on the market, and in both countries artists put great efforts into making pictures that would be a success, often changing the direction of their style to meet popular or critical taste. The British Institution
was added to the London scene in 1805, holding two annual exhibitions, one of new British art for sale, and one of loans from the collections of its aristocratic patrons. These exhibitions received lengthy and detailed reviews in the press, which were the main vehicle for the art criticism
of the day. Critics as distinguished as Denis Diderot
and John Ruskin
held their readers attention by sharply divergent reviews of different works, praising some extravagantly and giving others the most savage put-downs they could think of. Many of the works were already sold, but success at these exhibitions was a crucial way for an artist to attract more commissions. Among important early one-off loan exhibitions of older paintings were the Art Treasures Exhibition, Manchester 1857
, and the Exhibition of National Portraits
in London, at what is now the Victoria and Albert Museum
, held in three stages in 1866-68.
As the academic art
promoted by the Paris Salon, always more rigid than London, was felt to be stifling French art, alternative exhibitions, now generally known as the Salon des Refusés
("Salon of the Refused") were held, most famously in 1863, when the government allowed them an annex to the main exhibition for a show that included Édouard Manet
's Luncheon on the Grass (Le déjeuner sur l’herbe)
and James McNeill Whistler's
Girl in White. This began a period where exhibitions, often one-off shows, were crucial in exposing the public to new developments in art, and eventually Modern art
. Important shows of this type were the Armory Show
in New York City in 1913 and the London International Surrealist Exhibition
in 1936.
Museums started holding large loan exhibitions of historic art in the late 19th century, as also did the Royal Academy, but the modern "blockbuster" museum exhibition, with long queues and a large illustrated catalogue, is generally agreed to have been introduced by the exhibitions of artifacts from the tomb of Tutankhamun
held in several cities in the 1970s. Many exhibitions, especially in the days before good photographs were available, are important in stimulating research in art history
; the exhibition held in Bruges
in 1902 (poster illustrated below) had a crucial impact on the study of Early Netherlandish painting
.
is minimized or limited. As all objects in the library exhibition are unique and to some extent vulnerable, it is essential that they be displayed with care. Not all materials are able withstand the hardships of display, and therefore each piece needs to be assessed carefully to determine its ability to withstand the rigors of an exhibition. In particular, when exhibited items are archival artifacts
or paper-based objects, preservation considerations need be emphasized because damage and change in such materials is cumulative and irreversible. Two trusted sources – the National Information Standard Organization's Environmental Conditions for Exhibiting Library and Archival Materials, and the British Library's
Guidance for Exhibiting Library and Archive Materials – have established indispensable criteria to help curtail the deleterious effects of exhibitions on library and archival materials. These criteria may be divided into five main preservation categories: Environmental concerns of the exhibition space; Length of the exhibition; Individual cases; Display methods used on individual objects; and Security.
, and temperature
.
Light
Light wavelength
, intensity
, and duration contribute collectively to the rate of material degradation in exhibitions. The intensity of visible light in the display space should be low enough to avoid object deterioration, but bright enough for viewing. A patron’s tolerance of low level illumination can be aided by reducing ambient light levels to a level lower than that falling on the exhibit. Visible light levels should be maintained at between 50 lux
and 100 lux depending on the light sensitivity of objects. An items level of toleration will depend on the ink
s or pigment
s being exposed and the duration of the exhibition time. A maximum exhibition length should initially be determined for each exhibited item based on its light sensitivity, anticipated light level, and its cumulative past and projected exhibition exposure.
Light levels need to be measured when the exhibition is prepared. UV
light meters will check radiation levels in an exhibit space, and data event loggers help determine visible light levels over an extended period of time. Blue wool standards cards can also be utilized to predict the extent to which materials will be damaged during exhibits. UV radiation
must be eliminated to the extent it is physically possible; it is recommended that light with a wavelength below 400 nm
(ultraviolet radiation) be limited to no more than 75 microwatts
per lumen
at 10 to 100 lux. Furthermore, exposure to natural light
is undesirable because of its intensity and high UV content. When such exposure is unavoidable, preventative measures must be taken to control UV radiation, including the use of blinds, shades, curtains, UV filter
ing films, and UV-filtering panels in windows or cases. Artificial light sources are safer options for exhibition. Among these sources, incandescent lamps
are most suitable because they emit little or no UV radiation. Fluorescent lamp
s, common in most institutions, may be used only when they produce a low UV output and when covered with plastic sleeves before exhibition. Though tungsten-halogen lamps are currently a favorite artificial lighting source, they still give off significant amounts of UV radiation; use these only with special UV filters and dimmers. Lights should be lowered or turned off completely when visitors are not in the exhibition space.
Relative humidity (RH)
The exhibition space's relative humidity (RH)
should be set to a value between 35% and 50%. The maximum acceptable variation should be 5% on either side of this range. Seasonal changes of 5% are also allowed. The control of relative humidity is especially critical for vellum
and parchment
materials, which are extremely sensitive to changes in relative humidity and may contract violently and unevenly if displayed in too dry an environment.
Temperature
For preservation purposes, cooler temperatures are always recommended. The temperature
of the display space should not exceed 72 °F. A lower temperature of down to 50 °F can be considered safe for a majority of objects. The maximum acceptable variation in this range is 5 °F, meaning that the temperature should not go above 77 °F and below 45 °F. As temperature and relative humidity are interdependent, temperature should be reasonably constant so that relative humidity can be maintained as well. Controlling the environment with 24-hour air conditioning and dehumidification is the most effective way of protecting an exhibition from serious fluctuations.
Damage from a long exhibition is usually caused by light. The degree of deterioration is different for each respective object. For paper-based items, the suggested maximum length of time that they should be on display is three months per year, or 42 kilolux
hours of light per year – whichever comes first.
An exhibition log report, including records of the length of the exhibition time and the light level of the display, may prevent objects from being exhibited too frequently. Displayed items need to be inspected regularly for evidence of damage or change. It is recommended that high-quality facsimiles of especially delicate or fragile materials be displayed in lieu of originals for longer exhibitions.
. Cases provide a physically and chemically secure environment. Vertical cases are acceptable for small or single-sheet items, and horizontal cases can be used for a variety of objects, including three-dimensional items such as opened or closed books, and flat paper items. All these objects can be arranged simultaneously in one horizontal case under a unified theme.
Materials used for case construction should be chosen carefully because component materials can easily become a significant source of pollutants or harmful fumes for displayed objects. Off-gassing from materials used in the construction of the exhibition case and/or fabrics used for lining the case can be destructive. Pollutants may cause visible deterioration, including discoloration of surfaces and corrosion
. Examples of evaluative criteria to be used in deeming materials suitable for use in exhibit display could be the potential of contact-transfer of harmful substances, water solubility
or dry-transfer of dyes, the dry-texture of paints, pH, and abrasiveness.
If possible, use only new cases constructed of safe materials such as metal, plexiglass, or some sealed
woods. Separating certain materials from the display section of an exhibition case by lining relevant surfaces with an impermeable barrier film will help protect items from damage. Any fabrics that line or decorate the case (e.g. polyester blend fabric), and any adhesives used in the process, should also be tested to determine any risk. Using internal buffers and pollutant absorbers, such as silica gel
, activated carbon
, or zeolite
, is a good way to control RH and pollutants. Buffers and absorbers should be placed out of sight in the base or behind the backboard of a case. If the case is to be painted, it is recommended that one avoid oil paints. Acrylic
or Latex paint is preferable.
s and pamphlet
s, and unbound materials include manuscript
s, cards, drawing
s, and other two-dimensional items. The observance of proper display conditions will help minimize any potential physical damage. All items displayed must be adequately supported and secured.
Unbound materials
Unbound materials, usually single-sheet items, need to be attached securely to the mounts, unless matted or encapsulated. Metal fasteners, pins, screws, and thumbtacks should not come in direct contact with any exhibit items. Instead, photo corners
, polyethylene
, or polyester
film straps may hold the object to the support. Objects may also be encapsulated in polyester
film, though old and untreated acidic papers should be professionally deacidified
before encapsulation. Avoid potential slippage during encapsulation – when possible, use ultrasonic or heat seals. For objects that need to be hung (and that may require more protection than lightweight polyester film), matting would be an effective alternative.
Objects in frames should be separated from harmful materials through matting
, glazing
, and backing layers. Matting, which consists of two pH-neutral or alkaline boards with a window cut in the top board to enable the object to be seen, can be used to support and enhance the display of single sheet or folded items. Backing layers of archival cardboard should be thick enough to protect objects. Moreover, any protective glazing used should never come in direct contact with objects. Frames should be well-sealed and hung securely, allowing a space for air circulation between the frame and the wall.
Bound materials
The most common way to display bound materials is closed and lying horizontally. If a volume is shown open, the object should be open only as much as its binding
allows. Common practice is to open volumes at an angle no greater than 135°. There are some types of equipment that help support volumes as they displayed openly: blocks or wedges, which hold a book cover to reduce stain at the book hinge; cradles, which support bound volumes as they lay open without stress to the binding structure; and polyester film strips, which help to secure open leaves. Textblock supports are best used in conjunction with book cradles where the textblock is greater than 1/2 inch, or where the textblock noticeably sags. Regardless of its method of support, however, it is with noting that any book that is kept open for long periods can cause damage. One should turn an exhibited book's pages every few days in order to protect pages from overexposure to light and spread any strain on the binding structure.
, which can be fitted at entry points to the building and internal areas.
Art
Art is the product or process of deliberately arranging items in a way that influences and affects one or more of the senses, emotions, and intellect....
exhibitions are traditionally the space in which art objects (in the most general sense) meet an audience
Audience
An audience is a group of people who participate in a show or encounter a work of art, literature , theatre, music or academics in any medium...
. The exhibit is universally understood to be for some temporary period unless, as is rarely true, it is stated to be a "permanent exhibition". In American English, they may be called "exhibit", "exposition" (the French word) or "show". In UK English, they are always called "exhibitions" or "shows", and an individual item in the show is an "exhibit".
Such expositions may present pictures, drawing
Drawing
Drawing is a form of visual art that makes use of any number of drawing instruments to mark a two-dimensional medium. Common instruments include graphite pencils, pen and ink, inked brushes, wax color pencils, crayons, charcoal, chalk, pastels, markers, styluses, and various metals .An artist who...
s, video, sound, installation, performance, interactive art or sculpture
Sculpture
Sculpture is three-dimensional artwork created by shaping or combining hard materials—typically stone such as marble—or metal, glass, or wood. Softer materials can also be used, such as clay, textiles, plastics, polymers and softer metals...
s by
individual artists, groups of artists or collections of a specific form of art.
The art works may be presented in museum
Museum
A museum is an institution that cares for a collection of artifacts and other objects of scientific, artistic, cultural, or historical importance and makes them available for public viewing through exhibits that may be permanent or temporary. Most large museums are located in major cities...
s, art halls, art clubs or
private art galleries
Art gallery
An art gallery or art museum is a building or space for the exhibition of art, usually visual art.Museums can be public or private, but what distinguishes a museum is the ownership of a collection...
, or at some place the principal business of which is not the display or sale of art, such as a coffeehouse
Coffeehouse
A coffeehouse or coffee shop is an establishment which primarily serves prepared coffee or other hot beverages. It shares some of the characteristics of a bar, and some of the characteristics of a restaurant, but it is different from a cafeteria. As the name suggests, coffeehouses focus on...
. An important distinction is noted between those exhibits where some or all of the works are for sale, normally in private art galleries, and those where they are not. Sometimes the event is organized on
a specific occasion, like a birthday, anniversary or commemoration.
Types of exhibitions
There are different kinds of artArt
Art is the product or process of deliberately arranging items in a way that influences and affects one or more of the senses, emotions, and intellect....
exhibitions, in particular there is a distinction between commercial and non-commercial exhibitions. Temporary museum exhibitions typically display items from the museum's own collection on a particular period, theme or topic, supplemented by loans from other collections, mostly those of other museums. They normally include no items for sale; they are distinguished from the museum's permanent displays, and most large museums set aside a space for temporary exhibitions. Exhibitions in commercial galleries are often entirely made up of items that are for sale, but may be supplemented by other items that are not. Typically, the visitor has to pay (extra on top of the basic museum entrance cost) to enter a museum exhibition, but not a commercial one in a gallery. Retrospective
Retrospective
Retrospective generally means to take a look back at events that already have taken place. For example, the term is used in medicine, describing a look back at a patient's medical history or lifestyle.-Music:...
s look back over the work of a single artist; other common types are individual expositions or "solo shows"
Solo show (art exhibition)
A solo show or solo exhibition is an exhibition of the work of only one artist. The artwork may be paintings, drawings, etchings, collage, sculpture, or photography. The creator of any artistic technique may be the subject of a solo show. Other skills and crafts have similar types of shows for the...
, group expositions, or expositions on a specific theme or topic. The Biennale
Biennale
Biennale is Italian for "every other year" and can be used to describe any event that happens every two years. It is most commonly used within the art world to describe an international manifestation of contemporary art, stemming for the use of the phrase for the Venice Biennale, which was first...
is a large exhibition held every two years, often intending to gather together the best of international art; there are now many of these. A travelling exhibition
Travelling exhibition
A travelling exhibition, also referred to as a "travelling exhibit" or a "touring exhibition", is a type of exhibition that is available for circulation to one or more venues in addition to the premises of the organiser....
is another category of art exhibition.
Exhibitions of new or recent art can be juried, invitational, or open.
- A juriedJuried (competition)A juried competition is a competition in which participants' work is judged by a person or panel of persons convened specifically to judge the participants' efforts, either by the competition's stated rubric or by a subjective set of criteria dependent upon the nature of the competition or the...
exhibition, such as the Royal Academy Summer ExhibitionRoyal Academy summer exhibitionThe Summer Exhibition is an open art exhibition held annually by the Royal Academy in Burlington House, Piccadilly in central London, England, during the summer months of June, July, and August...
in London, the Chianciano Biennale at the Chianciano Museum of ArtChianciano Museum of artThe Chianciano Museum of Art is a Museum in the centre of the thermal Town of Chianciano Terme, Tuscany, with collections of both contemporary and ancient art...
, or the Iowa BiennialIowa BiennialThe Iowa Biennial Exhibition and Archive began in 2004 as an international survey of contemporary miniature printmaking with its initial exhibition held at the University of Iowa in Iowa City, Iowa. Works juried for the exhibition travel for exhibitions within the U.S...
, has an individual (or group) acting as judge of the submitted artworks, selecting which are to be shown. If prizes are to be awarded, the judge or panel of judges will usually select the prizewinners as well. - In an invitational exhibition, such as the Whitney BiennialWhitney BiennialThe Whitney Biennial is a biennale exhibition of contemporary American art, typically by young and lesser known artists, on display at the Whitney Museum of American Art in New York City, USA. The event began as an annual exhibition in 1932, the first biennial was in 1973...
, the organizer of the show asks certain artists to supply artworks and exhibits them. - An open or "non-juried" exhibition, such as the Kyoto Triennial, allows anybody to enter artworks and shows them all. A type of exhibition that is usually non-juried is a mail artMail artMail art is a worldwide cultural movement that began in the early 1960s and involves sending visual art through the international postal system. Mail Art is also known as Postal Art or Correspondence Art...
exhibition.
History
The art exhibition has played a crucial part in the market for new art since the 18th and 19th centuries. The Paris SalonParis Salon
The Salon , or rarely Paris Salon , beginning in 1725 was the official art exhibition of the Académie des Beaux-Arts in Paris, France. Between 1748–1890 it was the greatest annual or biannual art event in the Western world...
, open to the public from 1737, rapidly became the key factor in determining the reputation, and so the price, of the French artists of the day. The Royal Academy
Royal Academy
The Royal Academy of Arts is an art institution based in Burlington House on Piccadilly, London. The Royal Academy of Arts has a unique position in being an independent, privately funded institution led by eminent artists and architects whose purpose is to promote the creation, enjoyment and...
in London, beginning in 1769, soon established a similar grip on the market, and in both countries artists put great efforts into making pictures that would be a success, often changing the direction of their style to meet popular or critical taste. The British Institution
British Institution
The British Institution was a private 19th-century society in London formed to exhibit the works of living and dead artists; it was also known as the Pall Mall Picture Galleries or the British Gallery...
was added to the London scene in 1805, holding two annual exhibitions, one of new British art for sale, and one of loans from the collections of its aristocratic patrons. These exhibitions received lengthy and detailed reviews in the press, which were the main vehicle for the art criticism
Art criticism
Art criticism is the discussion or evaluation of visual art.Art critics usually criticize art in the context of aesthetics or the theory of beauty...
of the day. Critics as distinguished as Denis Diderot
Denis Diderot
Denis Diderot was a French philosopher, art critic, and writer. He was a prominent person during the Enlightenment and is best known for serving as co-founder and chief editor of and contributor to the Encyclopédie....
and John Ruskin
John Ruskin
John Ruskin was the leading English art critic of the Victorian era, also an art patron, draughtsman, watercolourist, a prominent social thinker and philanthropist. He wrote on subjects ranging from geology to architecture, myth to ornithology, literature to education, and botany to political...
held their readers attention by sharply divergent reviews of different works, praising some extravagantly and giving others the most savage put-downs they could think of. Many of the works were already sold, but success at these exhibitions was a crucial way for an artist to attract more commissions. Among important early one-off loan exhibitions of older paintings were the Art Treasures Exhibition, Manchester 1857
Art Treasures Exhibition, Manchester 1857
The Art Treasures of Great Britain was an exhibition of fine art held in Manchester, England, from 5 May to 17 October 1857. It remains the largest art exhibition to be held in the UK, possibly in the world, with over 16,000 works on display...
, and the Exhibition of National Portraits
Exhibition of National Portraits
The Exhibition of National Portraits was a series of three grand exhibitions in London at the South Kensington Museum between 1866 and 1868. The first one opened in April 1866, and contained portraits of people from or linked to the history of England until the Glorious Revolution...
in London, at what is now the Victoria and Albert Museum
Victoria and Albert Museum
The Victoria and Albert Museum , set in the Brompton district of The Royal Borough of Kensington and Chelsea, London, England, is the world's largest museum of decorative arts and design, housing a permanent collection of over 4.5 million objects...
, held in three stages in 1866-68.
As the academic art
Academic art
Academic art is a style of painting and sculpture produced under the influence of European academies of art. Specifically, academic art is the art and artists influenced by the standards of the French Académie des Beaux-Arts, which practiced under the movements of Neoclassicism and Romanticism,...
promoted by the Paris Salon, always more rigid than London, was felt to be stifling French art, alternative exhibitions, now generally known as the Salon des Refusés
Salon des Refusés
The Salon des Refusés, French for “exhibition of rejects” , is generally an exhibition of works rejected by the jury of the official Paris Salon, but the term is most famously used to refer to the Salon des Refusés of 1863.-Background:...
("Salon of the Refused") were held, most famously in 1863, when the government allowed them an annex to the main exhibition for a show that included Édouard Manet
Édouard Manet
Édouard Manet was a French painter. One of the first 19th-century artists to approach modern-life subjects, he was a pivotal figure in the transition from Realism to Impressionism....
's Luncheon on the Grass (Le déjeuner sur l’herbe)
The Luncheon on the Grass
Le déjeuner sur l'herbe – originally titled Le Bain – is a large oil on canvas painting by Édouard Manet created in 1862 and 1863. The painting depicts the juxtaposition of a female nude and a scantily dressed female bather on a picnic with two fully dressed men in a rural setting...
and James McNeill Whistler's
James McNeill Whistler
James Abbott McNeill Whistler was an American-born, British-based artist. Averse to sentimentality and moral allusion in painting, he was a leading proponent of the credo "art for art's sake". His famous signature for his paintings was in the shape of a stylized butterfly possessing a long stinger...
Girl in White. This began a period where exhibitions, often one-off shows, were crucial in exposing the public to new developments in art, and eventually Modern art
Modern art
Modern art includes artistic works produced during the period extending roughly from the 1860s to the 1970s, and denotes the style and philosophy of the art produced during that era. The term is usually associated with art in which the traditions of the past have been thrown aside in a spirit of...
. Important shows of this type were the Armory Show
Armory Show
Many exhibitions have been held in the vast spaces of U.S. National Guard armories, but the Armory Show refers to the 1913 International Exhibition of Modern Art that was organized by the Association of American Painters and Sculptors...
in New York City in 1913 and the London International Surrealist Exhibition
London International Surrealist Exhibition
The International Surrealist Exhibition was held from 11 June to 4 July 1936 at the New Burlington Galleries in London, England.The exhibition was organised by:* Hugh Sykes Davies* David Gascoyne* Humphrey Jennings* Rupert Lee* Diana Brinton Lee...
in 1936.
Museums started holding large loan exhibitions of historic art in the late 19th century, as also did the Royal Academy, but the modern "blockbuster" museum exhibition, with long queues and a large illustrated catalogue, is generally agreed to have been introduced by the exhibitions of artifacts from the tomb of Tutankhamun
Exhibitions of artifacts from the tomb of Tutankhamun
Exhibitions of artifacts from the tomb of Tutankhamun, in both permanent and travelling displays, have appeared in museums across several countries, notably the Soviet Union, United States and the United Kingdom...
held in several cities in the 1970s. Many exhibitions, especially in the days before good photographs were available, are important in stimulating research in art history
Art history
Art history has historically been understood as the academic study of objects of art in their historical development and stylistic contexts, i.e. genre, design, format, and style...
; the exhibition held in Bruges
Bruges
Bruges is the capital and largest city of the province of West Flanders in the Flemish Region of Belgium. It is located in the northwest of the country....
in 1902 (poster illustrated below) had a crucial impact on the study of Early Netherlandish painting
Early Netherlandish painting
Early Netherlandish painting refers to the work of artists active in the Low Countries during the 15th- and early 16th-century Northern renaissance, especially in the flourishing Burgundian cities of Bruges and Ghent...
.
Preservation issues
Although preservation issues are often disregarded in favor of other priorities during the exhibition process, they should certainly be considered so that possible damage to the collectionCollection (museum)
A museum is distinguished by a collection of often unique objects that forms the core of its activities for exhibitions, education, research, etc. This differentiates it from an archive or library, where the contents may be more paper-based, replaceable and less exhibition oriented...
is minimized or limited. As all objects in the library exhibition are unique and to some extent vulnerable, it is essential that they be displayed with care. Not all materials are able withstand the hardships of display, and therefore each piece needs to be assessed carefully to determine its ability to withstand the rigors of an exhibition. In particular, when exhibited items are archival artifacts
Archive
An archive is a collection of historical records, or the physical place they are located. Archives contain primary source documents that have accumulated over the course of an individual or organization's lifetime, and are kept to show the function of an organization...
or paper-based objects, preservation considerations need be emphasized because damage and change in such materials is cumulative and irreversible. Two trusted sources – the National Information Standard Organization's Environmental Conditions for Exhibiting Library and Archival Materials, and the British Library's
British Library
The British Library is the national library of the United Kingdom, and is the world's largest library in terms of total number of items. The library is a major research library, holding over 150 million items from every country in the world, in virtually all known languages and in many formats,...
Guidance for Exhibiting Library and Archive Materials – have established indispensable criteria to help curtail the deleterious effects of exhibitions on library and archival materials. These criteria may be divided into five main preservation categories: Environmental concerns of the exhibition space; Length of the exhibition; Individual cases; Display methods used on individual objects; and Security.
Environmental concerns of the exhibition space
The main concerns of exhibition environments include light, relative humidityRelative humidity
Relative humidity is a term used to describe the amount of water vapor in a mixture of air and water vapor. It is defined as the partial pressure of water vapor in the air-water mixture, given as a percentage of the saturated vapor pressure under those conditions...
, and temperature
Temperature
Temperature is a physical property of matter that quantitatively expresses the common notions of hot and cold. Objects of low temperature are cold, while various degrees of higher temperatures are referred to as warm or hot...
.
Light
Light wavelength
Wavelength
In physics, the wavelength of a sinusoidal wave is the spatial period of the wave—the distance over which the wave's shape repeats.It is usually determined by considering the distance between consecutive corresponding points of the same phase, such as crests, troughs, or zero crossings, and is a...
, intensity
Intensity (physics)
In physics, intensity is a measure of the energy flux, averaged over the period of the wave. The word "intensity" here is not synonymous with "strength", "amplitude", or "level", as it sometimes is in colloquial speech...
, and duration contribute collectively to the rate of material degradation in exhibitions. The intensity of visible light in the display space should be low enough to avoid object deterioration, but bright enough for viewing. A patron’s tolerance of low level illumination can be aided by reducing ambient light levels to a level lower than that falling on the exhibit. Visible light levels should be maintained at between 50 lux
Lux
The lux is the SI unit of illuminance and luminous emittance, measuring luminous flux per unit area. It is used in photometry as a measure of the intensity, as perceived by the human eye, of light that hits or passes through a surface...
and 100 lux depending on the light sensitivity of objects. An items level of toleration will depend on the ink
Ink
Ink is a liquid or paste that contains pigments and/or dyes and is used to color a surface to produce an image, text, or design. Ink is used for drawing and/or writing with a pen, brush, or quill...
s or pigment
Pigment
A pigment is a material that changes the color of reflected or transmitted light as the result of wavelength-selective absorption. This physical process differs from fluorescence, phosphorescence, and other forms of luminescence, in which a material emits light.Many materials selectively absorb...
s being exposed and the duration of the exhibition time. A maximum exhibition length should initially be determined for each exhibited item based on its light sensitivity, anticipated light level, and its cumulative past and projected exhibition exposure.
Light levels need to be measured when the exhibition is prepared. UV
Ultraviolet
Ultraviolet light is electromagnetic radiation with a wavelength shorter than that of visible light, but longer than X-rays, in the range 10 nm to 400 nm, and energies from 3 eV to 124 eV...
light meters will check radiation levels in an exhibit space, and data event loggers help determine visible light levels over an extended period of time. Blue wool standards cards can also be utilized to predict the extent to which materials will be damaged during exhibits. UV radiation
Radiation
In physics, radiation is a process in which energetic particles or energetic waves travel through a medium or space. There are two distinct types of radiation; ionizing and non-ionizing...
must be eliminated to the extent it is physically possible; it is recommended that light with a wavelength below 400 nm
Nanometre
A nanometre is a unit of length in the metric system, equal to one billionth of a metre. The name combines the SI prefix nano- with the parent unit name metre .The nanometre is often used to express dimensions on the atomic scale: the diameter...
(ultraviolet radiation) be limited to no more than 75 microwatts
Watt
The watt is a derived unit of power in the International System of Units , named after the Scottish engineer James Watt . The unit, defined as one joule per second, measures the rate of energy conversion.-Definition:...
per lumen
Lumen (unit)
The lumen is the SI derived unit of luminous flux, a measure of the total "amount" of visible light emitted by a source. Luminous flux differs from power in that luminous flux measurements reflect the varying sensitivity of the human eye to different wavelengths of light, while radiant flux...
at 10 to 100 lux. Furthermore, exposure to natural light
Sunlight
Sunlight, in the broad sense, is the total frequency spectrum of electromagnetic radiation given off by the Sun. On Earth, sunlight is filtered through the Earth's atmosphere, and solar radiation is obvious as daylight when the Sun is above the horizon.When the direct solar radiation is not blocked...
is undesirable because of its intensity and high UV content. When such exposure is unavoidable, preventative measures must be taken to control UV radiation, including the use of blinds, shades, curtains, UV filter
UV filter
UV filters are individual compounds or mixtures to prevent ultraviolet light from getting through. UV filters are used in sunscreens to protect skin or in photography to reduce the level of ultraviolet light that strikes the recording medium....
ing films, and UV-filtering panels in windows or cases. Artificial light sources are safer options for exhibition. Among these sources, incandescent lamps
Incandescent light bulb
The incandescent light bulb, incandescent lamp or incandescent light globe makes light by heating a metal filament wire to a high temperature until it glows. The hot filament is protected from air by a glass bulb that is filled with inert gas or evacuated. In a halogen lamp, a chemical process...
are most suitable because they emit little or no UV radiation. Fluorescent lamp
Fluorescent lamp
A fluorescent lamp or fluorescent tube is a gas-discharge lamp that uses electricity to excite mercury vapor. The excited mercury atoms produce short-wave ultraviolet light that then causes a phosphor to fluoresce, producing visible light. A fluorescent lamp converts electrical power into useful...
s, common in most institutions, may be used only when they produce a low UV output and when covered with plastic sleeves before exhibition. Though tungsten-halogen lamps are currently a favorite artificial lighting source, they still give off significant amounts of UV radiation; use these only with special UV filters and dimmers. Lights should be lowered or turned off completely when visitors are not in the exhibition space.
Relative humidity (RH)
Relative humidity
Relative humidity is a term used to describe the amount of water vapor in a mixture of air and water vapor. It is defined as the partial pressure of water vapor in the air-water mixture, given as a percentage of the saturated vapor pressure under those conditions...
The exhibition space's relative humidity (RH)
Relative humidity
Relative humidity is a term used to describe the amount of water vapor in a mixture of air and water vapor. It is defined as the partial pressure of water vapor in the air-water mixture, given as a percentage of the saturated vapor pressure under those conditions...
should be set to a value between 35% and 50%. The maximum acceptable variation should be 5% on either side of this range. Seasonal changes of 5% are also allowed. The control of relative humidity is especially critical for vellum
Vellum
Vellum is mammal skin prepared for writing or printing on, to produce single pages, scrolls, codices or books. It is generally smooth and durable, although there are great variations depending on preparation, the quality of the skin and the type of animal used...
and parchment
Parchment
Parchment is a thin material made from calfskin, sheepskin or goatskin, often split. Its most common use was as a material for writing on, for documents, notes, or the pages of a book, codex or manuscript. It is distinct from leather in that parchment is limed but not tanned; therefore, it is very...
materials, which are extremely sensitive to changes in relative humidity and may contract violently and unevenly if displayed in too dry an environment.
Temperature
Temperature
Temperature is a physical property of matter that quantitatively expresses the common notions of hot and cold. Objects of low temperature are cold, while various degrees of higher temperatures are referred to as warm or hot...
For preservation purposes, cooler temperatures are always recommended. The temperature
Temperature
Temperature is a physical property of matter that quantitatively expresses the common notions of hot and cold. Objects of low temperature are cold, while various degrees of higher temperatures are referred to as warm or hot...
of the display space should not exceed 72 °F. A lower temperature of down to 50 °F can be considered safe for a majority of objects. The maximum acceptable variation in this range is 5 °F, meaning that the temperature should not go above 77 °F and below 45 °F. As temperature and relative humidity are interdependent, temperature should be reasonably constant so that relative humidity can be maintained as well. Controlling the environment with 24-hour air conditioning and dehumidification is the most effective way of protecting an exhibition from serious fluctuations.
Length of the exhibition
One factor that influences how well materials will fare in an exhibition is the length of the show. The longer an item is exposed to harmful environmental conditions, the more likely that it will experience deterioration. Many museums and libraries have permanent exhibitions, and installed exhibitions have the potential to be on the view without any changes for years.Damage from a long exhibition is usually caused by light. The degree of deterioration is different for each respective object. For paper-based items, the suggested maximum length of time that they should be on display is three months per year, or 42 kilolux
Lux
The lux is the SI unit of illuminance and luminous emittance, measuring luminous flux per unit area. It is used in photometry as a measure of the intensity, as perceived by the human eye, of light that hits or passes through a surface...
hours of light per year – whichever comes first.
An exhibition log report, including records of the length of the exhibition time and the light level of the display, may prevent objects from being exhibited too frequently. Displayed items need to be inspected regularly for evidence of damage or change. It is recommended that high-quality facsimiles of especially delicate or fragile materials be displayed in lieu of originals for longer exhibitions.
Individual cases
Library or archival materials are usually displayed in cases or framesFrame and panel
Frame and panel construction is a woodworking technique often used in the making of doors, wainscoting, and other decorative features for cabinets, furniture, and homes...
. Cases provide a physically and chemically secure environment. Vertical cases are acceptable for small or single-sheet items, and horizontal cases can be used for a variety of objects, including three-dimensional items such as opened or closed books, and flat paper items. All these objects can be arranged simultaneously in one horizontal case under a unified theme.
Materials used for case construction should be chosen carefully because component materials can easily become a significant source of pollutants or harmful fumes for displayed objects. Off-gassing from materials used in the construction of the exhibition case and/or fabrics used for lining the case can be destructive. Pollutants may cause visible deterioration, including discoloration of surfaces and corrosion
Corrosion
Corrosion is the disintegration of an engineered material into its constituent atoms due to chemical reactions with its surroundings. In the most common use of the word, this means electrochemical oxidation of metals in reaction with an oxidant such as oxygen...
. Examples of evaluative criteria to be used in deeming materials suitable for use in exhibit display could be the potential of contact-transfer of harmful substances, water solubility
Solubility
Solubility is the property of a solid, liquid, or gaseous chemical substance called solute to dissolve in a solid, liquid, or gaseous solvent to form a homogeneous solution of the solute in the solvent. The solubility of a substance fundamentally depends on the used solvent as well as on...
or dry-transfer of dyes, the dry-texture of paints, pH, and abrasiveness.
If possible, use only new cases constructed of safe materials such as metal, plexiglass, or some sealed
Sealant
A sealant may be viscous material that has little or no flow characteristics and stay where they are applied or thin and runny so as to allow it to penetrate the substrate by means of capillary reaction...
woods. Separating certain materials from the display section of an exhibition case by lining relevant surfaces with an impermeable barrier film will help protect items from damage. Any fabrics that line or decorate the case (e.g. polyester blend fabric), and any adhesives used in the process, should also be tested to determine any risk. Using internal buffers and pollutant absorbers, such as silica gel
Silica gel
Silica gel is a granular, vitreous, porous form of silica made synthetically from sodium silicate. Despite its name, silica gel is a solid. It is a naturally occurring mineral that is purified and processed into either granular or beaded form...
, activated carbon
Activated carbon
Activated carbon, also called activated charcoal, activated coal or carbo activatus, is a form of carbon that has been processed to make it extremely porous and thus to have a very large surface area available for adsorption or chemical reactions.The word activated in the name is sometimes replaced...
, or zeolite
Zeolite
Zeolites are microporous, aluminosilicate minerals commonly used as commercial adsorbents. The term zeolite was originally coined in 1756 by Swedish mineralogist Axel Fredrik Cronstedt, who observed that upon rapidly heating the material stilbite, it produced large amounts of steam from water that...
, is a good way to control RH and pollutants. Buffers and absorbers should be placed out of sight in the base or behind the backboard of a case. If the case is to be painted, it is recommended that one avoid oil paints. Acrylic
Acrylic paint
Acrylic paint is fast drying paint containing pigment suspension in acrylic polymer emulsion. Acrylic paints can be diluted with water, but become water-resistant when dry...
or Latex paint is preferable.
Display methods
There are two kinds of objects displayed at the library and archival exhibition – bound materials and unbound materials. Bound materials include bookBook
A book is a set or collection of written, printed, illustrated, or blank sheets, made of hot lava, paper, parchment, or other materials, usually fastened together to hinge at one side. A single sheet within a book is called a leaf or leaflet, and each side of a leaf is called a page...
s and pamphlet
Pamphlet
A pamphlet is an unbound booklet . It may consist of a single sheet of paper that is printed on both sides and folded in half, in thirds, or in fourths , or it may consist of a few pages that are folded in half and saddle stapled at the crease to make a simple book...
s, and unbound materials include manuscript
Manuscript
A manuscript or handwrite is written information that has been manually created by someone or some people, such as a hand-written letter, as opposed to being printed or reproduced some other way...
s, cards, drawing
Drawing
Drawing is a form of visual art that makes use of any number of drawing instruments to mark a two-dimensional medium. Common instruments include graphite pencils, pen and ink, inked brushes, wax color pencils, crayons, charcoal, chalk, pastels, markers, styluses, and various metals .An artist who...
s, and other two-dimensional items. The observance of proper display conditions will help minimize any potential physical damage. All items displayed must be adequately supported and secured.
Unbound materials
Unbound materials, usually single-sheet items, need to be attached securely to the mounts, unless matted or encapsulated. Metal fasteners, pins, screws, and thumbtacks should not come in direct contact with any exhibit items. Instead, photo corners
Photo corners
Photo Corners are used to hold photographs in a photograph album or scrapbook. They can be made of many different materials, such as plastic, and paper. They also come in a variety of colors to blend in with the album. Original photo corners were like stamps, with a glue that needed to be...
, polyethylene
Polyethylene
Polyethylene or polythene is the most widely used plastic, with an annual production of approximately 80 million metric tons...
, or polyester
Polyester
Polyester is a category of polymers which contain the ester functional group in their main chain. Although there are many polyesters, the term "polyester" as a specific material most commonly refers to polyethylene terephthalate...
film straps may hold the object to the support. Objects may also be encapsulated in polyester
Polyester
Polyester is a category of polymers which contain the ester functional group in their main chain. Although there are many polyesters, the term "polyester" as a specific material most commonly refers to polyethylene terephthalate...
film, though old and untreated acidic papers should be professionally deacidified
Mass deacidification
Mass deacidification is a term used in Library and Information Science for one possible measure against the degradation of paper in old books . The goal of the process is to increase the pH of acidic paper on a large scale...
before encapsulation. Avoid potential slippage during encapsulation – when possible, use ultrasonic or heat seals. For objects that need to be hung (and that may require more protection than lightweight polyester film), matting would be an effective alternative.
Objects in frames should be separated from harmful materials through matting
Mat (picture framing)
In the picture framing industry, a mat is a thin, flat piece of paper-based material included within a picture frame, which serves as additional decoration and to perform several other, more practical functions, such as separating the art from the glass...
, glazing
Glazing
Glazing, which derives from the Middle English for 'glass', is a part of a wall or window, made of glass. Glazing also describes the work done by a professional "glazier"...
, and backing layers. Matting, which consists of two pH-neutral or alkaline boards with a window cut in the top board to enable the object to be seen, can be used to support and enhance the display of single sheet or folded items. Backing layers of archival cardboard should be thick enough to protect objects. Moreover, any protective glazing used should never come in direct contact with objects. Frames should be well-sealed and hung securely, allowing a space for air circulation between the frame and the wall.
Bound materials
The most common way to display bound materials is closed and lying horizontally. If a volume is shown open, the object should be open only as much as its binding
Bookbinding
Bookbinding is the process of physically assembling a book from a number of folded or unfolded sheets of paper or other material. It usually involves attaching covers to the resulting text-block.-Origins of the book:...
allows. Common practice is to open volumes at an angle no greater than 135°. There are some types of equipment that help support volumes as they displayed openly: blocks or wedges, which hold a book cover to reduce stain at the book hinge; cradles, which support bound volumes as they lay open without stress to the binding structure; and polyester film strips, which help to secure open leaves. Textblock supports are best used in conjunction with book cradles where the textblock is greater than 1/2 inch, or where the textblock noticeably sags. Regardless of its method of support, however, it is with noting that any book that is kept open for long periods can cause damage. One should turn an exhibited book's pages every few days in order to protect pages from overexposure to light and spread any strain on the binding structure.
Security
Because exhibited items are often of special interest, they demand a high level of security to reduce the risk of loss from theft or vandalism. Exhibition cases should be securely locked. In addition, cases may be glazed with a material that hinders penetration and that when broken does not risk shards of glass falling on the exhibits. Whenever possible, the exhibition area should be patrolled; a 24-hour security presence is recommended when precious treasures are exhibited. Finally, the exhibition is best protected when equipped with intruder alarmsBurglar alarm
Burglar , alarms are systems designed to detect unauthorized entry into a building or area. They consist of an array of sensors, a control panel and alerting system, and interconnections...
, which can be fitted at entry points to the building and internal areas.
See also
Art exhibitions- Arts festivalArts festivalAn arts festival is a festival that focuses on the visual arts in all its forms, but which may also focus on or include other arts.Arts festivals in the visual arts are exhibitions and are not to be confused with the commercial art fair. Artists participate in the most important of such festival...
- Exhibition historyExhibition historyAn exhibition history is a listing of exhibitions for an institution, artist or a work of art. Exhibition histories generally include the name of the host institution, the title of the exhibition and the opening and closing dates of the exhibition....
- List of museums
External links
- Carpe Diem.iM - Online exhibition for fine arts
- Yucolo.com - Current art exhibitions in Germany, Austria, Switzerland, Spain and Portugal
- Artabase.net - Current and archived international exhibitions
- ArtVista - Art fair calendar
- Exposicions.tv - Current exhibitions in Barcelona