Wool fabric was treated with a hot aqueous solution of cupric acetate, then extracted with boiling ethanol and dried. The product was green-colored and shrink-resistant. A mixture of cupric carbonate and propionic acid also shrinkproofed wool, but cupric chloride, nitrate, or sulfate did not. Some effects of the treatment were examined by copper analysis, electron paramagnetic absorption, x-ray photoelectron spectroscopy, optical microscopy, and scanning electron microscopy.
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