A patented product, that in feather dyeing is capable of taking the
place of all other reds. It is the only dyestuff that satisfactorily
takes the place of extract of safflower, producing, with the aid of
a proportion of oxalic acid, the most beautiful shades of scarlet
and cardinal. It is perfectly fast to light, dissolves readily in
boiling water, and comes to us in the form of a dull red powder. Its
adulterations, if it contains any, have never interfered with its
success; in fact, to the feather dyer it contains virtues too manifold
and valuable to enumerate.