BWF-658 Color Fixing Agent for Reactive Dyed and Printed Textiles BWF-658 is a formaldehyde-free cationic polymer color fixing agent for reactive-dyed blended textiles and printed fabrics. It contains 50 ± 0.5% solids and is intended for applications requiring improved resistance to washing, perspiration and high-temperature soaking. Product overview BWF-658 is a reddish-brown to amber transparent viscous liquid that dissolves readily in cold water. The product is intended