(57) A process for setting a wool yarn comprising treating the yarn at a temperature within
the range from 85° to 108°C and at a pH from 4 to 8, with an aqueous solution containing
from 0.5 to 5.0 % by weight, based on the weight of yarn, of an N-methylolurea having
the formula
wherein R is hydrogen, alkyl of 1 to 4 carbon atoms or -CH2OY1; X, and X2 are each hydrogen, alkyl of 1 to 4 carbon atoms or-CH2OY2, or X1 and X2 together represent ethylene, propylene, 1,2-dihydroxyethylene, 2-hydroxypropylene,
1-methoxy-2-dimethylpropylene,
Y, Y1 and Y2 are each hydrogen or alkyl of 1 to 4 carbon atoms, Z is hydrogen, alkyl or hydroxyalkyl
each having 1 to 4 carbon atoms and R' and R" each have the significance given for
R.
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