Tachardia lacca

Unlike other natural resins, shellac [9000-59-3] is derived from the hardened secretion of the lac insect (species l ccifer (Tachardia) lacca Kerr (family Coccidae), also known as Kerns lacca (Kerr)). Shellac is a refined grade of the cmde lac secretion and is the most widely known lac product. Therefore, shellac has been accepted as the common generic term. Over 50% of the world s supply is produced in the Indian provinces of Bihar and Orissa, with the remainder originating in adjacent areas of southeast Asia such as Sri Lanka, China, Thailand, and Myanmar. 

Waxes are the principal component in traditional varnishes such as shellac, a wax made by the cochineal insect Tachardia lacca. 

Shellac, Bleached, occurs as an off white to tan, amorphous, granular resin. Shellac is obtained from lac, the resinous secretion of the insect Laccifer (Tachardia) lacca Kerr (Fam. Coc-cidae). Shellac, Bleached, is obtained by dissolving the lac in aqueous sodium carbonate, followed by bleaching with sodium hypochlorite, precipitation of the bleached lac with a dilute sulfuric acid solution, and drying. It is freely (though very slowly) soluble in alcohol, insoluble in water, and slightly soluble in acetone and in ether. Shellac, Bleached, is usually dissolved in a suitable solvent for application to food products. 

PROP From the resinous secretion, called lac, of the insect Uaccifer (Tachardia) lacca Kerr (Fam. Coccidai). Off white, amorphous, granular solid. Sol in ale insol in water sltiy sol in acetone, ether. 

Shellac or lac is obtained by purification of the resinous secretion of the insect Laccifero (Tachardia) lacca Kerr (Homoptera, Coccidae). The insect lives on the sap of the stems of various trees secretions are found most abundantly on the smaller branches and twigs, which are broken off and constitute sticklac. After scraping of the twigs and soaking in water, the water-soluble components are removed by treatment with dilute alkali. The resulting water-insoluble material is called seed lac. 

Lac A resinous substance secreted by a scale insect (Tachardia lacca) which Uves on the twigs of various trees, especially certain species of the genus ficus. 

Definition Purified and bleached lac, the resinous secretion of the insect Laccifer (Tachardia) lacca Empirical Shellac, purified... 

Resins largely amorphous, solid or half-solid, transparent, odorless and tasteless organic substances, usuaUy of vegetable origin. Tree R. are clashed according to age into fossil R., such as amber, recent fossil R. (several years to centuries old), e.g. copal R and recent R., which occur mostly as balsams fresh from injured trees. Caoutchouc (see) is included with the R. Herbaceous plants produce R., e.g. mastic, but not in any considerable quantity. Mixtures of R. with mucin are called gum R. Solutions of R. are referred to as balsams. The most important animal R. is shellac, produced by the female East Asian scale insect (Tachardia lacca). 

Laocaic adds (C. I. natural red 25). A group of red an-thraquinone pigments excreted from glands of scale insect species (e.g., Laccifer lacca, Tachardia laced) living in South East Asia on Butea monosperma (Fabaceae) and Zizyphus mauritiana (Rhamnaceae) as host plants and used as pigments for cosmetics and foods. 

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