Aniline leather
Encyclopedia
Aniline leather is a type of leather dyed exclusively with soluble dye
Dye
A dye is a colored substance that has an affinity to the substrate to which it is being applied. The dye is generally applied in an aqueous solution, and requires a mordant to improve the fastness of the dye on the fiber....

s without covering the surface with a topcoat paint or insoluble pigments. The resulting product retains the hide's natural surface with the 'grain', i.e. visible pores, scars etc. of the complete original animal's skin structure.

Aniline leather is not dyed with poisonous aniline
Aniline
Aniline, phenylamine or aminobenzene is an organic compound with the formula C6H5NH2. Consisting of a phenyl group attached to an amino group, aniline is the prototypical aromatic amine. Being a precursor to many industrial chemicals, its main use is in the manufacture of precursors to polyurethane...

. Originally, the dyes used for this process were synthesized from aniline through chemical reaction
Chemical reaction
A chemical reaction is a process that leads to the transformation of one set of chemical substances to another. Chemical reactions can be either spontaneous, requiring no input of energy, or non-spontaneous, typically following the input of some type of energy, such as heat, light or electricity...

s. These dyes used to be called 'aniline dyes
Mauveine
Mauveine, also known as aniline purple and Perkin's mauve, was the first synthetic organic chemical dye.Its chemical name is3-amino-2,±9-dimethyl-5-phenyl-7-phenazinium acetate...

' or 'tar dyes'. In modern times, the dyes used are subject to laws and regulations in many countries, and the use of certain azo compounds is prohibited as there are reasons to assume health risks.

Typically, leather is dyed both for aesthetic reasons and to conceal blemishes. The dye colours leather without producing the uniform surface of pigmented leather. Any visible variations on the surface of the undyed leather such as natural blemishes will remain visible.

There are different kinds of aniline leather, but the same kinds of dyes are used in the process. The dyes used are clear and transparent chemicals that allow the grain structure of the leather to be seen. These dyes show the natural texture, but do not protect the leather from damage.

Aniline leather may be referred to as full aniline or full sauvage leather to differentiate between this dye treatment and variants. Semi-aniline leather is produced through a very similar process to full-aniline, but has a thin protective top coat added to protect it from wear and staining. Pull up aniline leather has additional oil or wax applied to the leather to give it a distressed look.
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