Sour RR [Pariser]Sour RR Sour RR is a neutralizing sour product with exceptional rust removing capabilities. The product is introduced into the washer during the final step of the wash formula to neutralize residual alkalinity left in the textiles or rinse water. Applications Use Sour RR in a range between 12 ounces per 50 pounds of wash subject to the raw water pH and iron concentrations. Carefully test linen residuals to maintain a pH on the finished linen between