Upholstery PreSpray Rapidly dissolves body and hair oils. Safe for use on whites, cotton, silk, wool, velvets, satin and all colorfast fabrics. Self-neutralizing. Active pH is 9.50; after 10 minutes on fabric the pH will neutralize to 6.50 Eliminates over-wetting and over-scrubbing. Prevents browning caused by pH. Excellent for use on silk or wool carpet and area rugs.