BWF-422 Cationic Color Fixing Agent BWF-422 is a formaldehyde-free cationic polymer color fixing agent containing 50 ± 0.5% solids. It is designed for reactive and other anionic dye applications. Its 1% solution pH is 7.0-10.0, while the recommended fixation bath pH is 6.0-7.0. Product overview BWF-422 is supplied as a light yellow viscous liquid that dissolves readily in cold water. It is used after dyeing and thorough washing, with particular emphasis on reactive dye