Native cotton was modified with methylated methylolmelamine in combination with dimethyloldihydroxyethyleneurea by a two-step treatment similar to that of the Poly-Set process. Physical properties were determined before and after urea phosphoric acid (UPac) hydrolysis to determine if the stripping action of UPac could be used in quality control in the Poly-Set process. UPac does provide a means of correcting treatment errors occurring at any stage of the Poly-Set treatment.
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