Note:  Do not rely on this information. It is very old.


Copal, a resinous substance which occurs as an exudation from certain trees in the East Indies, S. America, and other tropical regions. It hardens by exposure to air, and comes into commerce as smooth, yellowish, translucent lumps. Its solution in turpentine, or other volatile solvent, is largely used as a transparent and almost colourless varnish.