2684. The Mordants
For the reasons just given, the acetate or tartrate of iron is preferable to the sulphate; and the acetate or tartrate of alumina to alum.
For reds, yellows, green, and pinks
, aluminous mordants are to be used.
For blacks, browns, puces, and violets
, the acetate or tartrate of iron must be employed.
For scarlets
, use a tin mordant, made by dissolving in strong nitric acid one-eighth of its weight of sal-ammoniac, then adding by degrees one-eighth of its weight of tin, and diluting the solution with one-fourth of its weight of water.
Cunning Men's Cloaks Sometimes Fall.