Product Name: Cream of Tartar
Physical Structure: Powder
Potassium bitartarate; It is the salt of tartaric acid found in grapes. Its formula is KC4H5O6. It is also known as cream of tartar.
Cream of tartar works better with animal or protein fibers and is rarely used with plant or cellulose fibers. Use at 5-6% WOF
It is an optional addition to the alum mordant bath and to some dye baths. It is used to soften wool, brighten shades, and point the color of some dyes.