本文讨论了紫胶树脂结合剂的一般性质和特性，及其在加工光学抛光片中的应用。
The natural properties and characteristics of shellac resin and its application in producing optical polishing pills are described.
讨论了紫胶树脂的一般性质、特性，及其在加工光学抛光片中的应用。
The natural properties and characteristics of shellac resin and its application in fabricating optical polishing pills are descibed.
紫胶，虫胶由紫胶虫分泌的沉积于树上的树脂分泌物，用于制造虫胶清漆。
A resinous secretion of the lac insect deposited on trees and used in making shellac.
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