Mix and grind fine:

12 pounds best carbon black;

40 "

blown bodied linseed oil;

16 "

hard gum japan;

32 "

turpentine or turps substitute;

100 pounds soft paste.

For application with spraying machine or for dipping, thin the paste with 100 lbs. turpentine or 50 lbs. each turpentine and turpentine substitute, producing 200 pounds liquid black or 25 gallons, weighing 8 pounds per gallon. Bake for 2 or 3 hours at 250 to 300 ° F.