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PAPER AND ITS USES
Coils.—Used for various purposes, such as telegraph, time recording machines, cash registers, music rolls for piano players, wiping the die in relief stamping, and for printing small forms on the reel. Papers are slit from the full reel, and re-wound on centres suitable for the machine or other spindles.
Collar Papers.—Papers for making paper collars and similar articles; made of wood pulp with a woven cotton or linen fabric rolled down to the paper, the surface filled with mineral and the whole highly rolled.
Copying Papers.—Thin glazed or unglazed papers of the same character and composition as tissues, but sometimes having a small amount of mineral matter added to ensure perfect copying. These papers are used for taking press copies of correspondence, the original being written (or typewritten) with copyable ink. The copying paper is damped, the superfluous moisture removed with a sheet of drying royal (q.v.) an oiled sheet placed at the back of the copying page and the whole placed in the copying press and given a good squeeze. One or more perfect copies of the correspondence can be obtained by this method. As copying books are made with 500 or 1,000 leaves, the reams are made up of 500 sheets. Rotary copying machines employ copying paper in rolls, sometimes perforated at regular intervals, a damping roller preparing the paper: the copy is taken by rotary pressure. Everdamp copying paper eliminates the damping roller from this class of machine.
Cork Paper.—For packing bottles, coarse wrapping paper is covered with adhesive, and on this powdered cork is sprinkled making an elastic packing material. For cigarette tips very thin sheets of cork are pasted to tissues and cut to widths suitable for the well-known cork tips.
Corrugated Paper.—The corrugation is effected by machine, the corrugated paper being glued or pasted to a flat web of similar paper. Commonly the thinnest strawboards are used, but for better classes white papers are employed. Obtainable in sheets or rolls, corrugated paper serves as protective packing for many classes of goods.
