Black Printing Ink.
To make a good, permanent black printing ink, take
| Balsam copaiva | 9 oz. | |
| Best lampblack | 3 oz. | |
| Prussian blue | 1½ oz. | |
| Indian red | 0¾ oz. | |
| Turpentine soap, dried | 3 oz. |
Grind on a stone until extreme fineness has been obtained. This ink will work clear and sharp, and can easily be removed from the type.