When wool is immersed in solutions of metal ammines, metal is adsorbed and the fibers contract. There are also interesting changes in the x-ray photographs of the fibers. Data are given for the absorption of copper from several copper ammines by untreated and chemically modified wools. The mechanism of the reactions involved is discussed. The effect of the absorbed copper on the physical properties of the fibers is also considered, special attention being given to the moisture relations and the setting characteristics of metal-containing fibers.
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