The Degradation of Silk, Wild Silk and Wool by Steam

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Abstract
The degradation of silk and wild silk in one hour at 0 to 75 lbs. of steam per square inch and for one-half to five hours at 60 lbs., and of wool in one hour at 0 to 40 lbs. and for one to five hours at 10 lbs., has been followed by weight, nitrogen, sulfur and wet breaking strength. Degradation by steam. has been shown to increase with increasing time or pressure and to be greater for wool than for the silks, and greater for wild silk than for silk. Mechanical failure of these protein fibres has been shown more rapid than loss of weight, nitrogen, or sulfur, indicating a breakdown of fibrous structure preceding formation of soluble degradation products.

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