Cream of Tartar
Cream of Tartar is the sediment produced in the process of making wine. It is an optional addition to the alum mordant bath and to some dyebaths. It is used to soften wool, brighten shades, and point the colour of some dyes – such as the fuchsia of cochineal to a true red. Cream of tartar works best with animal or protein fibres and is seldom used with plant or cellulose fibres. Use at 5-6% WOF.
