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celluloid[from cellulose], transparent, colorless synthetic plasticplastic,
any organic material with the ability to flow into a desired shape when heat and pressure are applied to it and to retain the shape when they are withdrawn. Composition and Types of Plastic
..... Click the link for more information. made by treating cellulose nitrate with camphor and alcohol. Celluloid was the first important synthetic plastic and was widely used as a substitute for more expensive substances, such as ivory, amber, horn, and tortoiseshell. It is highly flammable and has been largely superseded by newer plastics with more desirable properties. It has been used for combs, brush handles, billiard balls, knife handles, buttons, and other useful objects.
a plastic based on cellulose nitrate (pyroxylin). It also contains a plasticizer (dibutyl phthalate, castor oil, petrolatum, or synthetic camphor) and a dye. Celluloid is processed by hot stamping, pressing, and mechanical working. It is used in the manufacture of various products, including plane-table boards, rulers, certain haberdashery goods, and toys. Because Celluloid is highly flammable, there has been a considerable reduction in its use.