Grind.

Ruby.—

Purple mixture2 1/2 parts
Rose mixture1 1/2 parts

Grind.

Maroon.—

Rose mixture1 part
Purple mixture2 parts

Grind. {307}

Black—Extra quality.—

Red oxide of iron12 parts
Carbonate of cobalt12 parts
Oxide of cobalt 1 part
Black flux A (see next formula)80 parts

Glost fire.