A really effective cold water paint, in order to resist the elements and remain white, should contain a white pigment of good body and some oil in addition to the water, and with this purpose in view the following is suggested:
(7) To make 100 lbs. of such paint, mix 10 lbs. white, pure in oil, with 10 lbs. bolted whiting, 8 lbs. raw linseed oil, 6 lbs. soft soap (made with potash), and 26 lbs. soft water.
One quart of pale copal varnish will improve the preparation. The formula given is of the right consistency to apply on dressed lumber with the brush. For application on rough lumber or with the spraying machine it requires more thinning with water and varnish.
The following is taken from Pearce’s “Painting and Decorating”:
(8) A London recipe for distemper has the following proportions: 4 “balls” whiting, 2 lbs. Young’s patent size, and sufficient water to cover the whiting.
(9) A Scotch distemper is described as: 12 lbs. whiting, size as given previously, 2 ozs. alum, 2 ozs. soft soap. It is very fast, for passages, schools, etc. Tinting colours for limewash should be restricted to ochres, umbers, lime blue, lime greens, charcoal or lamp black, and earthy reds (as Venetian).
(10) External limewash for farm buildings, etc., may be made as follows: Lime, ½ bushel, slaked with 1 gallon of milk and remainder of water, 1 lb. salt and ½ lb. sulphate of zinc to make it withstand the weather.
Experiments with and practical tests of these and other kinds of whitewash are being carried out, and the author hopes that he may find opportunity at some later date of announcing the results obtained.
[10] Experiments and tests carried out for the author by the Department of Scientific and Industrial Research place this receipt at the head of the list.
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