The conditions under which formaldehyde reacts with variously treated wools to impart resistance to the hydrolytic effects of alkaline detergents containing proteolytic enzymes have been investigated. Wools which are normally highly susceptible to damage in these detergents may be treated with dilute solutions of formaldehyde at the boil to mitigate this degradation almost completely. The inhibition of proteolysis is consistent with reaction, mainly at the amino residues of lysine.
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