37—MOTHPROOFING WITH PERMETHRIN DURING DYEING

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Abstract
An investigation is reported in which the levels of permethrin that could be expected in exhausted dye liquors were determined under conventional wool-dyeing conditions. Interactions between permethrin and some commonly used dyes and auxiliaries were also studied. There were indications that high pH values in the dye-bath may cause unacceptable decomposition of the mothproofer. Dye-bath residues of permethrin were very low, except in the presence of Albegal C and Lubrol N–13, and alternatives to these products should be used in mothproofing with permethrin. Permethrin had no significant effect on dye performance and should be compatible with most classes of wool dyes.

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