Please select one of the letters below to view the glossary of terms.
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CAA
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Civil Aviation Authority - the regulatory body for aviation in UK.
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Chrome Tanned
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Leather tanned either solely with chromium salts or with chromium salts together with quite small amounts of some other tanning agent used merely to assist the chrome tanning process, and not in sufficient amount to alter the essential chrome tanned character of the leather.
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Chromium (III)
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The most popular mineral used in the tanning process, used because of its excellent high shrinkage temperature and lightfastness properties
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Chromium (VI)
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This is the oxidised form of Chromium (III) and is classified as a human carcinogen. This mineral salt is not used in the tanning of leather.
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Cigarette & Match Test
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Test that forms part of BS 7176, the resistance to ignition of upholstered furniture. This particular section deals with the resistance to ignition of leather to a smoldering cigarette and simulated match.
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Coated Leather
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Any leather which has a surface coating in excess of 0.15mm and the thickness of this coating is less than 1/3 of the total thickness of the product.
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Collagen
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The principal fibrous protein in the corium or derma layer of a hide or skin.
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Conditioning
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The process where the temperature and humidity are regulated prior to testing. The requirements are that the temperature must be 23oC plus or minus 2oC and 50% Relative Humidity, plus or minus 5%. These are set in accordance with BS 3144.
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Corium
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The term given to the main component of the hide fibre structure(see figure 2).
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Corrected Grain Leather
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Leather from which the grain layer has been partially removed by buffing to a depth governed by the condition of the raw material and upon which a new surface has been built by various finishes.
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Crib
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An open structure wooden crate, whose size determines the nature of various iginition sources, for testing differing degrees of fire retardency.
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Crib 5
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The term given to a composite flammability test, often involving leather or other surface materials. A crib (see above) of size “5” is used in BS5852:2006 and leather that passes this test is often referred to as “crib5” leather.
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Crosslinker
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A chemical agent that reacts and crosslinks across the top layer of finish to give enhanced rub-fastness properties to the finish.
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Crust
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Sometimes used as an adjectival noun, “in the crust”, to describe leather that has been dyed and dried, but not finished
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Curing (Finishing)
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The period when the crosslinking reaction in the finish is taking place, a curing reaction proceeds with time and more rapidly with heat. It can be hindered by low temperatures and a humid atmosphere.
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