Description
Copal is the general name for fossil and other hard resins found in almost all tropical countries. All are distinguished by their yellowish to yellowish-brown color and their solubility in chloral hydrate, alcohol, linseed oil, and turpentine. Their main use is in the manufacture of lacquers, varnishes, coatings, and adhesives.
Uses
In varnishes and cements; as substitute for amber; manufacture of oil cloths and linoleum. In dentistry, for modeling Compounds and cavity varnishes.
Definition
Extractives and their physically modified derivatives. It is a product which may contain resin acids and their esters, terpenes, and oxidation or polymerization products of these terpenes. (Trachylobium or Hymenaea courbaril, Leguminosae).
