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PAPER AND ITS USES
scrim on to the surface to prevent the coating coming in contact with the contents of the package. A coating between two sheets of thin wrapping paper is another method of waterproofing. Used for protecting goods from the influence of moisture. Roofing paper is a variety of waterproof paper prepared by coating strong papers with tar.
Waxed Paper.—Thin paper passed through a bath of melted paraffin wax which makes it perfectly impervious to moisture. Used for packing goods which are liable to deterioration if exposed to the atmosphere.
Whatman Boards are made by pasting sheets of "Whatman" drawing paper together until the desired thickness of board is attained. Boards only faced with "Whatman" paper are also supplied under this name.
Wheatstone Paper.—Blue tinted paper cut to narrow width for use in the tape machine, the telegraphic messages being recorded on the paper strip.
Willesden Paper.—Strong paper rendered impervious to moisture by immersion in a solution made copper in ammonia. The surface of the paper is thus partially dissolved, and the paper is washed, rolled, and dried. If a thick sheet is desired, thinner sheets are brought together while wet and consolidated by rolling.
Wiping-off Papers.—Papers used for relief stamping machines, usual substance demy 20 to 30 Ib.; in widths 2 inches, 2½ inches, 3 inches, 3½ inches, 4 inches, 5 inches, 6 inches, 7 inches, 7! inches, 9 inches, loj inches.
Wrapping Papers are described under the heads of Bag, Biscuit Caps, Browns, Caps, Carbolic, Casings, Cork, Corrugated, Cutlery, Drapers, Fruit, Grocery, Hosiery, Kraft, Parchment, Rocket, Royal Hands, Sealings, Shops, Skips, Small Hands, Sulphite Browns, Tea Cartridges, Tobacco Papers. Sizes, weights, and prices on page 142.
Writings.—Hard-sized papers of all kinds are suitable for writing, but an even paper of good surface is essential. See under Account Book, Bank-note, Banks, Bill, Cheque, Ledger, Lined Brief, Loan, Safety Cheque, Silurian, Typewriting, Vellum Papers. Sizes, weights, and prices on pp. 138-39.
