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1950-51 Theatre Catalog, 9th Edition, Page 418 (396)

1950-51 Theatre Catalog, 9th Edition
1950-51 Theatre Catalog
1950-51 Theatre Catalog, 9th Edition, Page 418
Page 418

1950-51 Theatre Catalog, 9th Edition, Page 418

A PLAT WALL PAINT is made by grinding the pigments into a. solution of Pliolite 5-5 resin to ' tum). This is the type of. mill commonly used in the paint industry. The iinal step (bottom(pi::l:ii:) m the development of PliolI-le S-S paints is the coating of panels which are subiected to numerous tests, such as those shown in the Sherwin-Williams pictures. (Pliolite pictures by Goodyear Rubber.)

down. Do not blast near exposed machinery, compartments where others are Working, or places where it is impossible to control the dust and water.

By scaling and power wire brushing, most of the old paint and heavy scale is removed with a clipping hammer. Then it is cleaned with a rotary wire brush. This type of cleaning is not as thorough as sandblasting, since it removes paint only from the high spots but will not clean out the pits. It also takes more time and men. Take it easy with the chipping hammer. While it chips the paint, it will also chip the steel and raise sharp points from which the paint will pull away and leave thin spots. The thin spots are like the seat of old dungarees: not much protection. While the scraping is going on, cover all electrical equipment in the vicinity. After paint removal job is done, thoroughly clean all electrical equipment.

Scraping and hand wire brushing is similar to scaling and wire brushing method, except that no power tools are employed. A hoe or flat steel piece is used to scrape 01f as much rust, loose paint, dirt, and the like as possible and a hand wire brush finishes the cleaning. Obviously, the power tool method is superior.

The amount of exposed bare steel, the amount of intact primer coat, and the amount of finish coat firmly adhering will determine which of the methods described is to be used. If the surface is badly corroded and a large percentage of bare metal is exposed, it should be completely cleaned by the most suitable method described. Be sure that all the rust is removed, or it will continue to spread and force the paint off.

If there are large areas of film primer or finish coats and relatively little corrosion, it is usually advisable to touch up these areas instead of completely cleaning and painting. First, scale and Wire brush all corroded areas to bare metal. Then wipe off any grease or oil With a rag soaked with gasoline or thinner, since Wire brushing will not remove it. Then, with a hand wire brush, roughen the complete surface, removing all minor corrosion, loose paint, dirt, and so forth.


Half a century ago, varnish making was a secret art, the details of which were jealously guarded by its adepts. Formulas and manufacturing procedure, though comparatively simple, were jealously guarded by their possessors and entrance to the stack was as difficult as entrance into a secret society, The practical varnish maker sneered at the chemist, and his sneer was more or less justified by the state of chemical knowledge at that time.

But it was inevitable that, with the advance of organic and especially collaid and physicalechemistry, an indus try of such importance should arouse the interest of scientists. The consequence is that today the experimental laboratory dominates the plant, and formulas are dictated, after long research and testing, by the practical scientist. The old method of trial and error is definitely out of the picture.

The advent of synthetics in great numbers and variety has further strengthened the position of the scientist, and has also brought the stack into closer cooperation with the laboratory.

1950-51 Theatre Catalog, 9th Edition, Page 418