Part 195

Above stain 1 part Flux No. 8 (see page 307) 3 parts

Sky Blue.—

Flint glass 30 parts White lead 10 parts Pearlash 2 parts Common salt 2 parts Oxide of cobalt 4 parts Enamel, white 4 parts

Chrome Green.—

Borax 10 parts Oxide of chrome 4 1⁠/⁠2 parts White lead 9 parts Flint glass 9 parts Oxide of cobalt 2 parts Oxide of tin 1 part {306}

Coral Red.—

Bichromate potash 1 part Red lead 4 1⁠/⁠2 parts Sugar of lead 1 1⁠/⁠2 parts Flint 1 1⁠/⁠2 parts Flint glass 1 part

Enamel White.—Soft:

Red lead 80 parts Opal glass 50 parts Flint 50 parts Borax 24 parts Arsenic 8 parts Niter 6 parts

Enamel White.—

Red lead 10 parts Flint 6 parts Boracic acid 4 parts Niter 1 part Soda crystals 1 part

Where the enameled work is intended to be exposed to the weather do not use flux No. 8, but substitute the following:

White lead 1 part Ground flint glass 1 part

All the enamels should, after being mixed, be melted in crucibles, poured out when in liquid, and powdered or ground for use.

«FUSIBLE ENAMEL COLORS.»

The following colors are fusible by heat, and are all suitable for the decoration of china and glass. In the following collection of recipes certain terms are employed which may not be quite understood by persons who are not connected with either the glass or porcelain industries, such as “glost fire” and “run down,” and in such cases reference must be made to the following definitions:

“Run down.” Sufficient heat to melt into liquid.

“Glost fire.” Ordinary glaze heat.

“Grind only.” No calcination required.

“Hard fire.” Highest heat attainable.

“Frit.” The ingredients partly composing a glaze, which require calcination.

“Stone.” Always best Cornwall stone.

“Paris white.” Superior quality of whiting.

“Parts.” Always so many parts by weight, unless otherwise stated.

“D. L. Zinc.” Particular brand not essential. Any good quality oxide of zinc will do.

Ruby and Maroon.—Preparation of silver:

Nitric acid 1 ounce Water 1 ounce

Dissolve the silver till saturated, then put a plate of copper in the solution to precipitate the silver in a metallic state. Wash well with water to remove the acetate of copper.