probably due to tannin formingcomplexes with proteins most efficiently near the protein isoelectric point. Padding cotton with WPI atonly 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 tothat treated with soy protein isolate (SPI), under the same dyeing conditions. For protein-treated cottonfabrics, except for color fastness to light and crocking, all other fastness properties (washing, water, seawater, perspiration and hot pressing) were rated as good to excellent