Chapter I: II III (21)

«Black Varnishes.»—Black spirit lacquers are employed in the wood and metal industries. Different kinds are produced according to their use. They are called black Japanese varnishes, or black brilliant varnishes.

«Black Japanese Varnish.»—I.—Sculpture varnish, 5 parts; red acaroid varnish, 2 parts; aniline black, 1/4 part; Lyons blue, .0015 parts. If a sculpture varnish prepared with heated copal is employed, a black lacquer of especially good quality is obtained. Usually 1 per cent of oil of lavender is added.

II.—Shellac 4 parts
Borax 2 parts
Glycerine 2 parts
Aniline black 5 parts
Water 50 parts

Dissolve the borax in the water, add {720} the shellac, and heat until solution is effected; then add the other ingredients. This is a mat-black varnish.

«For Blackboards.»—For blackening these boards mix 1/2 liter (1.05 pints) good alcohol, 70 grams (1,080 grains) shellac, 6 grams (92 grains) fine lampblack, 3 grams (46 grains) fine chalk free from sand. If red lines are to be drawn, mix the necessary quantity of red lead in alcohol and shellac.

«Bookbinders’ Varnishes.»—

I II III IV V Per Per Per Per Per Cent Cent Cent Cent Cent Shellac 14.5 6.5 13.5 6.3 8.3 Mastic 6.0 2.0 — — 1.1 Sandarac 6.0 13.0 — 1.3 1.1 Camphor 1.0 — 0.5 1.5 — Benzoin — — — — 13.7 Alcohol 72.5 78.5 86.0 79.2 75.8

Scent with oil of benzoin, of lavender, or of rosemary. Other authors give the following recipes: