This color requires a pure bottom, that is, naturally white or
bleached. After cleaning, respectively washing in warm soap, which
must not even be omitted with bleached feathers, and thorough rinsing,
prepare a bath and dye as for dyeing light blue with indigo carmine.
Then add some aniline green and navy blue to the bath, re-enter the
feathers which have been taken up before making the addition, work them
well while raising the temperature to the boiling point; continue at
this temperature for one-half hour longer, lift, rinse, starch and dry
as usual.