I. Scour and rinse the white, respectively bleached feathers well.
Prepare a nearly boiling bath, acidulated with sulphuric acid, to which
simply add ponceau R. R. extra. Enter the feathers, operate at boiling
heat one-half hour, then lay down the feathers and let them lodge until
level; lift, rinse, starch and dry.
II. Prepare a sharp handwarm bath with one per cent. tartaric acid
(of the weight of feathers), or with one per cent. Glauber salt
and one-fourth per cent. sulphuric acid, to which add the filtered
solutions of ponceau R. B., ponceau 6 R. B., and eosine S. extra B.
Enter the feathers and agitate for twenty to thirty minutes, or until
the desired shade is obtained; lift, rinse, starch and dry.
III. Lay down the feathers for four hours in a cold bath in which some
chloride of tin has been dissolved; then dye for one-half hour in a
hand warm bath of cochineal, lift and dry.
IV. Prepare a bath with one and one-half per cent., of the weight of
feathers, saccharic acid, one-quarter per cent. tin salt, and six to
seven per cent. cochineal, bring the bath to boil for one minute; then
chill. Enter the scoured and rinsed feathers at hand heat, dye for
three-quarters of an hour, take up and expose them for two hours to the
air, rinse, starch and dry.