BLUE HAIR MARBLE.
The mode of producing it is the same as applied in producing black hair-marble, but, instead of black, Indigo is used. Indigo is the only one among blue coloring matters that admits of the necessary expansion for the production of hair veins without running off or gathering into small lumps.
RED AND BLACK HAIR MARBLE.
For the production of this marble, black and Indian red are taken. The black is first thrown upon the size as in black hair-vein marble, the red is then treated by adding gall until a drop thrown upon the black will spread to about 2 inches in diameter. The trial is made with a brush, but for the purpose of producing the marble a whisk is taken, by means of which the red is thrown upon the black in very small drops and close to each other.
BLUISH-BROWN HAIR MARBLE.
To produce this marble Indigo and Vandyke brown are taken. The Indigo is put on first then the Vandyke brown is thrown on by a whisk, and finally, the carpet of colors is forced into forming veins by sprinkling water, which is applied by aid of the brush and sieve.