How to Multiply Colours.
A printer who has on hand a stock of yellow, carmine, blue, and black inks, may produce other colours and shades by intermixing as follows:—
| Yellow and carmine, mixed, will give | Vermilion. |
| Carmine and blue | Purple. |
| Blue and black | Deep blue. |
| Carmine, yellow, and black | Brown. |
| Yellow and blue | Green. |
| Yellow and black | Bronze green. |
| Yellow, blue, and black | Deep green. |
Lighter shades may be obtained by adding proper proportions of white ink.