probably due to tannin forming complexes with proteins most efficiently near the protein iso electric point. Padding cotton with WPI at only 0.35% solid content afforded dyed fabrics having an approximately 50% increase in the K/S value incomparison to untreated fabrics. The color strength of the WPI-treated cotton was enhanced relative to that treated with soy protein isolate (SPI), under the same dyeing conditions. For protein-treated cotton fabrics, except for color fastness to light and crock, all other fastness properties (washing, water, seawater, perspiration and hot pressing) were rated as good to excellent