In preparing these stains the ingredients must be ground remarkably fine, and then so perfectly dried as not to leave the least humidity, after which they must be ground again with oil prepared for the purpose, composed of 2 parts balsam of sulphur, 1 part amber oil, and as much turpentine as will render them of a proper consistency; they may then be used with ease for painting various devices on biscuit ware.

Blue

5 parts blue calx, 2 frit for glazes, without tin oxide, 1 flint glass, 1 enamel blue.

Green

3 parts blue stain, 1 yellow stain, 1/2 enamel blue green.

Yellow

3 parts yellow under glaze, 1 frit for glazes, 1/4 chromate of iron.