For very deep shades naturally gray feathers may be used unbleached
with proper consideration of the tone of the bottom color. Have the
feathers well cleaned and rinsed, and add to a bath of two gallons of
water, one and one-quarter pounds cudbear and five ounces turmeric.
Bring the bath to boil, boil for five or ten minutes, let cool down to
100° F., enter the feathers and dye to shade. Lift, starch and dry.
Or, utilize a used ruby bath (following) and add to it five ounces
turmeric.