DETAILED DESCRIPTION We claim: 1. A detergent composition for fabrics consisting essentially of: (a) at least one acylcyanamide salt anionic surfactant present in about 1-30% by weight, having the formula ##STR2## in which Me is sodium or potassium and R is a C. sub. 9-23 alkyl or alkenyl, unsubstituted or substituted by at least one hydroxyl or alkoxyl group; (b) a builder which is at least one condensed phosphate, or phosphate substitute comprising an inorganic or organic compound having a builder effect at least partly equivalent to that of sodium tripolyphosphate, present in an amount sufficient to balance the composition to 100% by weight; (c) a non-acylcyanamide anionic surfactant, in an amount of 0 to about 30% by weight, which is alkylbenzene sulfonate, alpha-sulfofatty acid esters, alkane sulfonate, olefin sulfonate, alcohol sulfate, alkyl polyglycol ether sulfate, or any mixture thereof; (d) a nonionic surfactant, in an amount of 0 to about 30% by weight, which is an alcohol ethoxylate, alkyl phenol ethoxylate, or any mixture thereof; (e) a peroxide bleach, in an amount of 0 to about 40% by weight; (f) a foam regulator, in an amount of 0 to about 20% by weight; (g) a bleach activator, in an amount of 0 to about 1 equivalent, based on the quantity of bleach present; (h) a bleach stabilizer, in an amount of 0 to about 5% by weight; and (i) at least one auxiliary ingredient which is an enzyme, perfume oil, electrolyte, microbicide, or optical brightener, in an amount of 0 to a small percentage in addition to 100% of the detergent composition as defined by the foregoing ingredients. 2. The detergent composition of claim 1 wherein, in said acylcyanamide, R is an unsubstituted C. sub. 11-17 alkyl or alkenyl and Me is sodium. 3. The detergent composition of claim 1 wherein said nonionic surfactant (d) has the formula R--O--CH. sub. 2 --CH. sub. 2 --O). sub. m H in which R is a C. sub. 12-18 n-alkyl or n-alkenyl and m has an average value of about from 4 to 15. 4. The detergent composition of claim 1 wherein said builder (b) is sodium triphosphate, sodium aluminum silicate, sodium nitrilotriacetate, sodium alkane polyphosphonate, or any mixture thereof
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