How Is Wool Made Machine-Washable?

Really interesting because so many people would have wondered about the processes that make modern yarns easily washable. Thankyou for the information. 🙂

The Sweaty Knitter, Weaver and Devotee of Other Fiber Arts

Any wool (or protein fiber) is washable by hand and, often, in gentle cycles in cool water. Machine washable wool – wool that can be made into garments that can be tossed into a washing machine with no worry of shrinking – is readily available. Yet for years I have been reluctant to knit with machine washable wool; the wool always felt “different” to me, though I would be hard pressed to explain to someone exactly what “different” means. (Pic source)

In Fibre Facts (1981), Bette Hochberg sheds light on why machine washable wool has always felt “different” to me:

This wool is sometimes treated with chemicals to destroy the scales on its surface. This can decrease strength and durability, and impart a harsh texture to the wool. A less damaging method is to coat the wool with a resin which forms a thin plastic skin over each…

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