shellacks definition of shellacks in the Free Online Encyclopedia.

shellac, solution of lac lac, resinous exudation from the bodies of females of a species of scale insect (Tachardia lacca), from which shellac is prepared. India is the chief source of shellac, although some is obtained from other areas in Southeast Asia.
..... Click the link for more information. in alcohol or acetone. In commerce the name is applied to the resinous substance (lac) itself rather than to the solution. It ranges in color from orange to light yellow depending upon the extent to which it has been purified; the darker shellacs are the less pure. When bleached it is known as white shellac. Applied to surfaces such as wood and plaster, the solution forms a hard coating upon evaporation of the solvent. Shellac is widely used as a spirit varnish varnish, homogeneous solution of gum or of natural or synthetic resins in oil (oil varnish) or in a volatile solvent (spirit varnish), which dries on exposure to air, forming a thin, hard, usually glossy film.
..... Click the link for more information. , as a protective covering for drawings and plaster casts, for stiffening in the manufacture of felt hats, in making sealing wax, and in electrical insulation.

shellac

1. a yellowish resin secreted by the lac insect, esp a commercial preparation of this used in varnishes, polishes, and leather dressings

2. a varnish made by dissolving shellac in ethanol or a similar solvent

shellac [shə′lak]

(materials)

A natural, alcohol-soluble, water-insoluble, flammable resin; made from lac resin deposited on tree twigs in India by the lac insect (Laccifer lecca) used as an ingredient of wood coatings.

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shellac
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