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To Make Paper Waterproof

Melt in 10 pints hot water, 30 ounces glue, The copying ink to be used for the original writing must be made by dissolving (in a water-bath) about 6 pounds pure extract of logwood in 1 gallon distilled water.

Damp 6 sheets of the prepared paper, and remove all superfluous moisture with good blotting paper, place the original writing on the upper sheet, and put in the copying-press for about half a minute; then remove the original and substitute in its place 6 more damp sheets of the paper, and press for a gelatine or size, and 3 ounces gum-arabic. In quarter of an hour. Then take the original another 30 pints hot water, melt 20 ounces again and lay it on the top of 5 more damped soap and 4 pounds alum; mix both liquids sheets of the paper, and press for about two minutes; finally remove the original, and in its place put 3 more sheets of the paper, then press for a quarter of an hour. This process will give twenty copies. If more than twenty copies are to be made, the writing of the original should, before the ink is quite dry, be dusted over with a powder composed of 5 parts extract of logwood, 1. part powdered gum-arabic, and 1 part powdered gum-tragacanth. together in one pot. This constitutes composition No. 1. In another pot heat 1/2 gallon benzole and 1 gallon paraffine, and melt in it 24 ounces resin; let it boil until it attains a moderate degree of consistency. To these materials, resin, oil, and copal or mastic varnish may, in some cases, be added. This is composition No. 2. First dip the article to be waterproof into the composition No. 1 in a heated state, and then dry it. Next apply composition No. 2, in a cooled state, with a 1950. Process for Copying Very Old brush, or in any other convenient manner. Writings. Niepec St. Victor gives a new 1945. Papier-Maché. A plastic mate- process for copying very old writings. Ordirial, formed of cuttings of white or brown nary copying paper is used, but is wetted with paper, boiled in water, beaten to a paste in a a thin solution of glucose or honey instead mortar, and then mixed with a solution of of water. On coming out of the press the gum-arabic in size, to give tenacity. It is paper is exposed to strong ammonia, which variously manufactured by being pressed into oiled moulds, afterwards dried, covered with a mixture of size and lamp-black, or otherwise ornamented, and varnished. brings out very clearly lines otherwise almost illegible. 1951. To Prepare Paper for Varnishing. To prevent the absorption of varnish, and injury to any color or design on the pa- | 40 parts gum-arabic and 20 parts alum. Make per, it is necessary to first give it 2 or 3 coats a moderate paste of the starch by boiling, of size. The best size for white or delicate dissolve the gum and alum separately, and colors is made by dissolving a little isinglass then mix all together. When well mixed, in boiling water, or by boiling some clean apply hot with a flat, smooth brush, to the parchment cuttings until they form a clear so- leaves of paper. Then dry and smooth by lution; then strain through a piece of clean passing under the scraper of the lithographic muslin. It may be applied with a clean soft press. paint-brush, the first coat, especially, very 1958. Bernard and Delarne's Litholightly. The best brush for this purpose is graphic Crayons. Melt 4 parts pure white the kind used by varnishers for giving the finishing flow coats of varnish, wide, flat and soft; or, where there is much danger of injuring a design, and the paper article will allow of it, it is a good plan for the first coat, to wax over a slow fire; stir in by degrees 2 parts gum lac, broken into small pieces; next mix in 2 parts dried soap (made of tallow and soda), reduced to fine shavings; then stir in 1 part oil copal varnish into which 1 part. pour the solution into a wide, flat dish, and lampblack has been previously ground. Conpass the paper through it once, and back tinue to heat and stir until the paste has acagain, and then hang it up to dry. For less quired a proper consistence, which can be delicate purposes, a little light-colored glue, ascertained by forming a crayon with it in a soaked over night in enough water to cover it, mould, and allowing it to become cold. The and then dissolved by heat, adding hot water mould should be first wiped with a greased enough to dilute it sufficiently, will make an rag. excellent sizing.

Lasteyrie adopts a somewhat different for-