shellac(redirected from E904)
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A resinous excretion of an insect, Laccifer (Tachardia) lacca (family Coccidae). The insects suck the juice of various resiniferous Asiatic (chiefly Indian) trees and excrete and deposit "stick-lac." Shellac softens at a low temperature. It has many nonmedicinal uses and is also used to coat confections and tablets and in dental materials, for example, impression compound and denture base plates.
A refined resinous substance obtained from plants that contain the secretions of certain insects. It is used in paints, varnishes, dry compounding, and in dentistry.
CAUTION!Some individuals may develop contact dermatitis after exposure to shellac.
A resinous excretion that softens at low temperature and has many nonmedicinal uses and is also used to coat confections and tablets and in dental materials, e.g., impression compound and denture base plates.