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Coloring Finishing And Painting Wood

In order to make sure that the sand will stick to the paper more glue, this time in thin solution, is applied, and then a drying process with a hot blast is begun. When the glue becomes set or practically dry the paper is rolled up, or cut into sheets of standard sizes. Some manufacturers are now producing a new type of double-coated paper, known as split sandpaper, which has a layer of sand or grit on both sides. This paper will easily split apart, leaving two sheets of sandpaper, each being very thin and flexible. Such an abrasive is excellent for smoothing curved surfaces, because it can be more easily bent over one's hand or in a curved form than is the case with ordinary sandpaper. The Wet or dry Garnet Finishing Paper is another sandpaper that has some excellent features very desirable in wood-finishing, for this paper is waterproof, and can be used to great advantage over a wet felt pad.

The finer grades of Wetordry sandpaper, such as the 5/0 to 8/0 sizes, are excellent for sanding varnish between coats.

A varnish surface smoothed with one of these papers having the finest grit looks much like a finish rubbed with pumice-stone, and the operation can be completed in much less time.

8. Sizes of Sandpaper.—Many sizes of grit are used in manufacturing sandpaper, ranging from 8/0 to 4, as follows :

(1) Very five or soft papers, used by wood-finishers: from 00000000, or 8/0, to 00, or 2 /0.
(2) Medium sizes, commonly used by woodworkers: 0, or 1/0, 1/2, 1, 1%, 2.
(3) Very coarse papers, more commonly used on sanding-machines for rapid cutting: 21/2, 3, 31/2, 4. Sizes finer than 8/0 sandpaper are made by some manufacturers, but are not commonly found on the market. Unfortunately, the sizes of sandpaper are not absolutely standardized, and one manufacturer's sizes may not correspond exactly with those of another.