As circumstances—such as the fancy of some previous workman, or coloured vellum not to be obtained so early as required—may make it necessary to execute the proper colours, the proceedings are here given.
GREEN.
Put one ounce of verdigris and one ounce of white wine vinegar into a bottle, and place them near the fire for five days, shaking it three or four times each day. Wash the vellum over with weak pearlash, and then colour it to the shade desired.
RED.
To one pint of white wine vinegar, put a quarter of a pound of Brazil dust and a piece of alum. Cork the mixture up; let it stand in a warm place for two or three days.
PURPLE.
Proceed as for the red, substituting logwood chips for the Brazil dust.
YELLOW.
Half an ounce of turmeric to half a pint of spirits of wine, prepared as above.
BLACK.