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Relatively new techniques have been developed to improve wool’s washability by making the fiber more resistant to felting and shrinkage. One process takes place before the yarn is spun. The loose fleece or combed top is chlorinated to remove the tips of the “scales” and then coated with an extremely fine resin. The resin masks the fiber’s scales and keeps them from interlocking, which is the cause of felting and shrinkage.

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