This section is from the "Henley's Twentieth Century Formulas Recipes Processes" encyclopedia, by Norman W. Henley and others.
Agitate in a glass balloon 25,000 parts, by weight, of oil with a solution of 50 parts, by weight, potassium permanganate in 1,250 parts, by volume, of water. Let stand for 24 hours at a gentle warmth and add 75 parts, by weight, of powdered sodium sulphite. Agitate strongly and add 100 parts, by weight, of hydrochloric acid and again agitate. Let stand until decolorization takes place, then wash the oil with a sufficiency of water, carrying in suspension chalk, finely powdered, until the liquid no longer has an acid reaction. Finally filter off over anhydrous sodium sulphate.
The following is especially adapted for zinc painting, but will also answer for any paint: Mix 1 part binoxide of manganese, in coarse powder, but not dusty, with 10 parts nut or linseed oil. Keep it gently heated and frequently stirred for about 30 hours, or until the oil begins to turn reddish.
Oil of turpentine.... 40 parts
Barbadoes pitch.... 26 parts
Oil of rosemary..... 1 part
Oil of origanum .... 1 part
Oil of turpentine.... 2 parts
Rape oil........... 20 parts
Spirit of tar........ 2 parts
Alkanet root, quantity sufficient.
Macerate the alkanet root in the rape oil until the latter is colored deep red; then strain off and add the other ingredients.
 
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