The following gives, in the first place, a red, which passes to blue, then to pale lilac, and finally to white:
| Orpiment | 75 grains |
| Crystallized sal sodæ | 150 grains |
| Water | 10 ounces |
The following gives a yellow brown:
| Salt of nickel | 75 grains |
| Sulphate of copper | 75 grains |
| Chlorate of potash | 75 grains |
| Water | 10 ounces |
On mixing the following solutions, sulphur separates and the brass becomes covered with iridescent crystallizations:
| I.— | Cream of tartar | 75 grains |
|---|---|---|
| Sulphate of copper | 75 grains | |
| Water | 10 ounces | |
| II.— | Hyposulphite of soda | 225 grains |
| Water | 5 ounces |
Upon leaving the brass objects immersed in the following mixture contained in corked vessels they at length acquire a very beautiful blue color:
| Hepar of sulphur | 15 grains |
| Ammonia | 75 grains |
| Water | 4 ounces |
Miscellaneous Coloring Of Brass.
A verdigris color on brass is produced by treating the articles with dilute acids, acetic acid, or sulphuric acid, and drying.