The Chemical News And Journal of Industrial Science; With Which is ... 1-2
The Chemical News And Journal of Industrial Science; With Which is ... 1-2
William Tooke
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Collodion and castor oil have received a new application. Messrs. Barnwell and RoUaaon use the mixture for making ailka and other woven fabrics waterproof Their manner of proceeding is as follows: — *' Assuming the material under operation to be silk, we take collodion and mix it with vegetable oil, such as either hempseed, rape, olive, almond, not, poppy, castor, cotton, or linseed oil in the purest possible state, and we find that such oils when mixed with collodion undergo a change upon being... subjected to heat, and thja change or decomposition is highly advantageous in the sobsequent processes to which the silk will be applied. The mixture of collodion and oil is spread or poured upon plates or cylinders of metal or glass, and before it is ouite set the ailk is laid or rolled over it and immediately removed, bringing away with it a thin film of collodion and oil. The sUk thus coated is now removed to a stove or drying oven and snbmitted to a heat of 100^ to 300^ Fahrenheit by which the mixture undergoes the before named change or decomposition, and the result is that a slightly glazed appearance is imparted to the silk, which is at the same time coodderably strengthened or thickened, and may be rendered almost or quite opaone by the mixture of cdouring or tldckening matter with me collodion and oil.
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