Aniline Leather: Leather that has been dyed in a dye bath with some level of dye penetration.
Buffed Leather: Leather from which the grain is removed by an abrasive cylinder. This process is used in corrected grain leather.
Chrome Tannage: Tanning process with chromium salts resulting in soft, mellow hides receptive to excellent colour variety.
Corrected Grain: Related commonly to hides which the upper part of the grain has been removed. Usually pigmented.
Drum Dyeing: The application of dyestuffs to leather by the immersion of the leather in a drum that is tumbled. This process allows full dye penetration into the fibre.
Embossed Leather: Usually corrected grain, in which a pattern is applied by extreme pressure in a press, to give a unique design or imitation of full grain characteristics.
Finish: Generally defines a surface application on the leather to improve the use properties of the leather in general and to protect it from wetting and soiling; to level out patches and grain faults; to apply an artificial grain layer to splits or corrected grain leathers; to modify the surface properties (shade, lustre, handle, etc.)
Full Grain: Leather in which the grain layer or dermis has not been altered. The grain layer gives each type of leather its distinctive appearance.
Grain (Leather): The outside part of the hide or skin consisting of the pores, wrinkles, and other characteristics which constitute the natural texture of the leather.
Hide: The pelt of a large animal.
Patina: A natural characteristic that develops on full grain leather through normal use over a period of time.
Pigmented Leather: Leather that has been sprayed with a pigmented, opaque finish.
Side: Half a hide cut along the backbone.
Split Leather: Leather made from the bottom split, or reticular layer of the hide, which has an imitation grain embossed into a heavily finished pigmented surface to simulate papillary leather.
Suede: Fibrous leather typically made from the reticular part of the hide.
Synthetic Tannage: Tanning process by use of aliphatic tanning agents (aldehydes, polymerisation compounds, or paraffin derivatives). It is an alternative to the more general method of chromium tanning, where doesn’t appear this component or other heavy metals.
Tanning: The conversion process of rawhide into leather by use of various kind of tanning agents, that bring about irreversible stabilization of the skin substance that is prone to degradation, increase its resistance to shrinking, reduce its deformability, and its ability to swell, enhance its strength properties, etc.
Vegetable Tannage: Tanning process by use of vegetable tannins. This process produces leather with greater body and firmness than the more general method of chromium tanning.
Wet-Blue Leather: Leather that after chrome tanning has not been further processed and is sold in the wet condition.
Wet-White Leather: Leather tanned with synthetic tanning agents, it is chrome and heavy metals free. Also it should be sold in the wet condition.
Natural Grain: Leather that retains the full, original grain. Also its applied this term to a brushed, grain-suede leather.