Deposition of textile dyes and other soluble colored matter lower the whiteness of white fabrics over time but a combination of low levels of sodium percarbonate and TINOCAT TRS KB2 can bleach these in solution, helping whites stay white. Sodium percarbonate and TINOCAT TRS KB2 bleaches dyes in solution but not on the fiber and is therefore safe for colored goods. TINOCAT TRS KB2 is fully compatible with other Ciba whitener technologies, e.g. TINOPAL CBS-X and TINOLUX BMC.