CPC C11D 17/06 (2013.01) [C11D 3/0036 (2013.01); C11D 3/042 (2013.01); C11D 3/2075 (2013.01); C11D 3/2079 (2013.01); C11D 3/2086 (2013.01); C11D 3/33 (2013.01); C11D 3/3765 (2013.01); C11D 7/08 (2013.01); C11D 7/265 (2013.01); C11D 7/3245 (2013.01); C11D 17/0047 (2013.01); D06L 1/16 (2013.01); D06L 1/20 (2013.01); C11D 2111/12 (2024.01); C11D 2111/14 (2024.01)] | 13 Claims |
1. A method for treating linen, to reduce or eliminate iron deposition/redeposition comprising:
washing the linen with a detergent at an alkaline pH in a washing machine;
rinsing said linen;
obtaining a liquid linen treatment composition consisting of: about 15 wt. % to about 45 wt. % of a hydroxycarboxylic acid which is selected from one or more of: glycolic acid, malic acid, lactic acid, tartaric acid, citric acid, hydroxybutyric acid, glyceric acid, tartronic acid, salicylic acid, m-hydroxybenzoic acid, p-hydroxybenzoic acid, gallic acid, mandelic acid and gluconic acid; about 1 wt. 1% about 10 wt. % of a carboxylate polymer which is a polyacrylic acid salt, a polymaleic acid salt, or a combination thereof; water in the amount of between about 15 wt. % and about 45 wt. %; about 12 wt. % to about 21 wt. % of sulfuric acid form urea sulfate; and optionally one or more additives selected from a chelating agent, a dye, a perfume, an additional acid source, a surfactant and/or a defoamer;
applying the linen treatment composition or a use solution of said linen treatment composition to said linen; wherein the use solution of the linen treatment composition has a pH of between about 3 and about 10; and
reducing or eliminating iron deposition or redeposition on said linen,
wherein the linen treatment composition is free of a peroxycarboxylic acid and is applied prior to washing said linen, after washing said linen, during washing of said linen, or multiple times throughout the method.
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