This section is from the "Henley's Twentieth Century Formulas Recipes Processes" encyclopedia, by Norman W. Henley and others.
Cut some white curd soap in small pieces, pour boiling water on them, and add a little pearlash. When the soap is quite dissolved, and the mixture cool enough for the hand to bear, plunge the feathers into it, and draw them through the hand till the dirt appears squeezed out of them; pass them through a clean lather with some blue in it; then rinse them in cold water with blue to give them a good color. Beat them against the hand to shake off the water, and dry by shaking them near a fire. When perfectly dry, coil each fiber separately with a blunt knife or ivory folder.
Black.—Immerse for 2 or 3 days in a bath, at first hot, of logwood, 8 parts, and copperas or acetate of iron, 1 part.
Blue.—Same as II, but with the indigo vat.
Brown. — By using any of the brown dyes for silk or woolen.
Crimson.—A mordant of alum, followed by a hot bath of brazil wood, afterwards by a weak dye of cudbear.
Pink or Rose.—With safflower or lemon juice.
Plum.—With the red dye, followed by an alkaline bath.
Red.—A mordant of alum, followed by a bath of brazil wood.
Yellow.—A mordant of alum, followed by a bath of turmeric or weld.
Green.—Take of verdigris and verditer, of each 1 ounce; gum water, 1 pint; mix them well and dip the feathers, they having been first soaked in hot water, into the said mixture.
Purple.—Use lake and indigo.
Carnation.— Vermilion and smalt.