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Antiseptics and Disinfectants (May be made with talc)

may be made with talc or steatite, provided, after they are made, they be heated for several hours at a nearly white heat. By this strong calcination the steatite gets so hard that it strikes fire with flints, and resists the best tempered file. They may be polished by emery, tripoli, and jeweller's putty; and colored by mineral or organic matters; chloride of gold colors them purple; nitrate of silver, black; exposure to the reducing flame increases very much the brilliancy of the color.