CLICHE n.
any similar reproduction of ornament, or lettering, in relief. Cliché casting, a mode of obtaining an impression from a die or woodcut, or the like, by striking it suddenly upon metal which has been fused and is just becoming solid; also, the casting so obtained.
COAL TAR n.
A thick, black, tarry liquid, obtained by the distillation of bituminous coal in the manufacture of illuminating gas; used for making printer's ink, black varnish, etc. It is a complex mixture from which many substances have been obtained, especially hydrocarbons of the benzene or aromatic series.
COLLIDINE n.
rganic bases, C8H11N, usually pungent oily liquids, belonging to the pyridine series, and obtained from bone oil, coal tar, naphtha, and certain alkaloids.