140° C.

(3) _Red._--Vermilion, 10 parts; finished lacquer, 4; solvent, 2. This
lacquer is dried for about an hour at 130° to 140° C.

(4) _Khaki or Dirty Yellow._--Barium sulphate, 100 parts; chromic
oxide, 3; finished lacquer, 20 to 25; solvent, 15. This lacquer is
dried for about half an hour at 160° C.

(5) _Green._--Barium sulphate, 100 parts; chromic oxide, 20 to 50;
finished lacquer, 40 to 50; solvent, 20. This is dried for about 10
minutes at 160° C.

(6) _Yellow._--Barium sulphate, 100 parts; lead chromate, 40; finished
lacquer, 40; solvent, 20. This is dried for about 15 minutes at 150°
C.

Almost all pigments other than the above-mentioned are blackened by
contact with lacquer or suspend its drying quality.

Several organic lakes can be used for coloured lacquers, that is to
say, Indian yellow, thioflavin, and auramine lake for a yellow
lacquer; fuchsine, rhodamine, and chloranisidin lake for a red;
diamond sky blue, and patent nileblue lake for a blue; acid green,
diamond green, brilliant milling green, vert-methyl lake, etc., for a
green; methyl violet, acid violet, and magenta lake for a violet;
phloxine lake for a pink. These lakes, however, are decomposed more or
less on heating and fail to give proper colours when dried at a high
temperature.