FIELD: softening of water in domestic conditions. SUBSTANCE: composition comprises potassium hydroxide or carbonate and also hard water (with total hardness of 4-30 mg-equiv/l) and orthophosphoric acid. Ratio of components in the composition, wt.-%: potassium hydroxide, 6.5-8.6; orthophosphoric acid, 4.0-15; and hard water, the balance; or potassium carbonate, 8.0-16.0; orthophosphoric acid, 4.0-15.0; and hard water, the balance. EFFECT: improved properties. 3 cl
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