In a dairy

Dairy

A dairy is a business enterprise established for the harvesting of animal milk—mostly from cows or goats, but also from buffalo, sheep, horses or camels —for human consumption. A dairy is typically located on a dedicated dairy farm or section of a multi-purpose farm that is concerned...

, the creamery is the location of cream processing. Cream

Cream

Cream is a dairy product that is composed of the higher-butterfat layer skimmed from the top of milk before homogenization. In un-homogenized milk, over time, the lighter fat rises to the top. In the industrial production of cream this process is accelerated by using centrifuges called "separators"...

 is separated from whole milk; pasteurization

Pasteurization

Pasteurization is a process of heating a food, usually liquid, to a specific temperature for a definite length of time, and then cooling it immediately. This process slows microbial growth in food...

 is done to the skimmed milk and cream separately. Whole milk for sale has had some cream returned to the skimmed milk.

The creamery is the source of butter

Butter

Butter is a dairy product made by churning fresh or fermented cream or milk. It is generally used as a spread and a condiment, as well as in cooking applications, such as baking, sauce making, and pan frying...

 from a dairy. While cream is an emulsion

Emulsion

An emulsion is a mixture of two or more liquids that are normally immiscible . Emulsions are part of a more general class of two-phase systems of matter called colloids. Although the terms colloid and emulsion are sometimes used interchangeably, emulsion is used when both the dispersed and the...

 of fat-in-water, the process of churning

Churning (butter)

Churning is the process of shaking up whole milk to make butter, and various forms of butter churn have been used for the purpose. In Europe from the Middle Ages until the Industrial Revolution, this was generally as simple as a barrel with a plunger in it, which was moved by hand...

 causes a phase inversion to butter which is an emulsion of water-in-fat. Excess liquid as buttermilk

Buttermilk

Buttermilk refers to a number of dairy drinks. Originally, buttermilk was the liquid left behind after churning butter out of cream. It also refers to a range of fermented milk drinks, common in warm climates where unrefrigerated fresh milk otherwise sours quickly...

 is drained off in the process. While modern creameries are automatically controlled industries, the traditional creamery required skilled workers. Traditional tools included the butter churn

Butter churn

A butter churn is a device used to convert cream into butter. This is done through a mechanical process, frequently via a pole inserted through the lid of the churn, or via a crank used to turn a rotating device inside the churn.-Process:...

 and Scotch hands

Scotch hands

Scotch hands are large wooden spatulas used when making butter. They are used for shaping the butter into bricks and for other miscellaneous manipulation. One side of the paddle will have ribs or be fluted...

.