To revive or brighten carmine

—We may brighten ordinary carmine, and obtain a very fine and clear pigment, by di olving it in water of ammonia. For this purpose we leave ammonia upon carmine in the heat of the sun, till all its colour be extracted, and the liquor has got a fine red tinge. It must be then drawn off and precipitated, by acetic acid and alcohol, next washed with alcohol, and dried. Carmine di olved in ammonia has been long employed by painters, under the name of liquid carmine. Carmine is the finest red colour which the painter po e es. It is principally employed in miniature painting, water colours, and to tint artificial flowers, because it is more transparent than the other colours. For Car minium , see Cochineal .