For some years, the standard, most cost-effective treatment for producing machine-washable wool has involved the use of chlorine and Hercosett, a thin polymer resin, to prevent the scales, or cuticles, of the wool fiber from interlocking and causing felting and shrinkage. However, adsorbable organohalogens (AOX) can form as a byproduct of the chlorine process, and the AOX, if not properly treated, can pollute the process wastewater.
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