Celluloid

Celluloid is formed by well mixing gun-cotton and camphor. The mass becomes plastic and easily moulded when warm, hardening again on cooling. May be coloured by the addition of pigments to the constituents before mixing; and by pressing together differently coloured varieties, it may be obtained of a marbled and mottled appearance" It is largely used as a substitute for horn or ivory, and for the manufacture of imitation tortoise-shell, coral, or malachite articles.