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ALPHABETICAL LIST OF PAPERS
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boards; covering paper used by boxmakers; white or coloured.
Plate Papers.—Thick, soft printing papers, made of good material, soft-sized. The thicker kinds are made by bringing two or more webs together in the wet state and pressing them together, one side only being calendered. Used for taking impressions from engraved copper and steel plates, also for fine lithography. Usual sizes and weights are crown, demy, royal, and double crown, equivalent to 40 to 60 Ib. demy.
Porcelain Paper.—Thick transparent paper of the nature of celluloid, made of well-beaten pulp. Used for Christmas cards and similar work.
Portmanteau Boards.—Tough boards used for the shapes or shells of portmanteaux and trunks, over which the leather or canvas cover is fixed. Manufactured as millboards, flax and hemp fibres being employed.
Pottery Tissues.—Tissue papers specially prepared for printing transfers for pottery decoration. The printing is from copperplate, engraved rolls, or lithographic surface, and the pattern is transferred to the china or earthenware before glazing.
Press Boards.—Thin, hard glazed boards, made of the best materials (see Millboards). Heavily rolled and friction glazed. Used for interleaving work which is to be hot or cold pressed.
Pressings.—Thick coloured papers, made on the single cylinder machine, therefore with M.G. surface. Used for the covers of exercise books, for box covering, etc.
Printing's.—A large class of papers, which are usually made with a fair surface, machine finish. Printings are moderately sized, so as to absorb ink readily, and only a small quantity of loading is added. The materials used include all the fibres which will bleach well; hand-made printings are tub-sized, machine-made are all enginesized. Rag, rag and esparto, chemical wood and esparto, chemical wood, chemical and mechanical wood papers are the varieties obtainable, white or toned. Super-calendered, imitation art, and art papers can be included under this heading, but they are usually treated separately. Sizes, weights, and prices on pp. 136-37.
