Ferric hydrate, iron soaps and all insoluble impurities are precipitated.
Almost all soda soaps are precipitated from their watery solutions by the addition of a sufficiency of common salt.
Ammonia soaps have also been made, but with little commercial success; in 1906 H.
Resin soaps are compounds of soda or potash with the complex acids (chiefly abietic) of which coniferous resins consist.
Numerous varieties of soaps are made; the purposes to which they are applied are varied; the materials employed embrace a considerable range of oils, fats and other bodies; and the processes adopted undergo many modifications.