Method of reducing chromium levels in effluent chromate aftertreatment of wool dyeings

In a process wherein a textile substrate is dyed with a wool dye and the dyed substrate is aftertreated with a chromate compound, the improvement which comprises contacting the dyed substrate with the chromate compound in the presence of a composition comprising (B) a reducing carbohydrate and (A) a product selected from the group consisting of

• (A.sub.1) a product of reacting a mono- or poly-functional primary or secondary amine with cyanamide, dicyandiamide, guanidine or bi-guanidine, whereby up to 50 mole % of the cyanamide, dicyandiamide, guanidine or biguanidine may be replaced with a dicarboxylic acid or mono- or di-esters thereof, the product containing reactive hydrogen bound to nitrogen;
• (A.sub.2) the product of reacting A.sub.1 above with an N-methylol derivative of a urea, melamine, guanamine, triazinone, urone, carbamate or acid amide optionally in the presence of a catalyst for the crosslinking of N-methylol compounds of the type above;
• and
• (A.sub.3) the product of reacting A.sub.1 above and epihalohydrin or a precursor thereof.