The difficulty of removing oils from undamaged wool is attributed to its possessing an epicuticle which is mainly paraffinic in nature. Various treatments are carried out on wool; it is shown that there are direct relationships among the polarity of the wool surface, the ease of oil removal, and the degree of completeness of the epicuticle. Treat ments which render wool easy to wash are considered to do so by removing the hydro phobic epicuticle, thereby exposing the underlying hydrophilic keratin.
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