III.—Insufficient binding of the pigments and fillings with a suitable adhesive agent, which causes these bodies to absorb the adhesive power of the gums.
IV.—Excessive heating of the mass, caused by improper melting or faulty admixture of the gummy bodies. Turpentine and rosin must be heated before entering the shellac. If this rule is inverted, as is often the case, the shellac sticks to the bottom and burns partly.
Great care must be taken to mix the coloring matter to a paste with spirit or oil of turpentine before adding to the other ingredients. Unless this is done the wax will not be of a regular tint.
Dark Blue Wax.
Green Wax.
Carmine Red Wax.
Gold Wax.
White Wax.
| II.— | Bleached shellac | 28 parts |
|---|---|---|
| Venetian turpentine | 13 parts | |
| Plaster of Paris | 30 parts |
WAX FOR BOTTLES: See Photography.