15 u00b0 c the fabric produced had a yellowish green coloration and was not colored as deeply as the sample of example 3 this shows that the shade of the fabric can be altered by adjusting the concentration of the nitrous acid solution and the reacton time in the bath a 100 cotton sheeting fabric was treated as in example 1 except the padding solution was composed of 4 n phenyldiethanolamine 8 dimethylol dihydroxyethyleneurea 0 5 zinc nitrate hexahydrate and the remainder water after drying and curing as in example 1 the fabric was colored by treating with a 1 aqueous solution of nitrous acid at 6 u00b0 8 u00b0 c for 15 minutes this produced a green colored fabric which was then rinsed and dried this example shows varying concentrations of padding solution does effect fabric coloration produced by formation of the colored nitroso derivitive the fabric was treated as in example 5 except that the sample was treated with the nitrous acid solution for 2 5 minutes the color of this sample was greenish yellow this shows that varying the time in the nitrous acid solution results in a different shade fabric the fabric was treated as in example 5 except the sample was treated with a 0 1 aqueous solution of nitrous acid for 2 5 minutes the color of the fabric produced was yellow this shows that a different colored fabric can be produced by varying the concentration of the nitrous acid.