Soaps: a Practical Manual of the Manufacture of Domestic, Toilet And Other Soaps
Soaps: a Practical Manual of the Manufacture of Domestic, Toilet And Other Soaps
George H George Henry Hurst
The book Soaps: a Practical Manual of the Manufacture of Domestic, Toilet And Other Soaps was written by author George H George Henry Hurst Here you can read free online of Soaps: a Practical Manual of the Manufacture of Domestic, Toilet And Other Soaps book, rate and share your impressions in comments. If you don't know what to write, just answer the question: Why is Soaps: a Practical Manual of the Manufacture of Domestic, Toilet And Other Soaps a good or bad book?
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What comes into this country is almost purely of American origin. It is made, of course, in both France and Eussia, which are great turpen- tine-producing countries, but what rosin they produce is used locally, but little if any coming into EngUsh commerce. Eosin is a brittle, more or less transparent, resinous body, varying in colour from pale yellow to black. The colour of black rosin is really a dark red when looked through, 156 SOAP MANUFACTURE. but it appears black on looking at it. Someti...mes the rosin is opaque,nand not transparent ; this is due to the presence of water, which may be got rid of by keeping in a warm place for a short time. Several qualities of rosin are distinguished in trade — " window glass," ** amber," *' common," " black," etc. This difference in quality is due partly to the quality of the crude turpentine from which the rosin is obtained, partly to the amount of care exercised in its extraction. The best " virgin " gives window-glass rosin, ** vellow dip " gives amber rosin, and ** scrapings " the black rosin.
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