An Introduction to the Chemistry of Paints
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In our eReader you can find the full English version of the book. Read An Introduction to the Chemistry of Paints Online - link to read the book on full screen. Our eReader also allows you to upload and read Pdf, Txt, ePub and fb2 books. In the Mini eReder on the page below you can quickly view all pages of the book - Read Book An Introduction to the Chemistry of Paints
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" That is to say, it is thoroughly well ground and washed, and by the process of levigation the different grades of the pigment can be separated. The finer qualities are used in different kinds of printing, the coarser, and consequently the cheaper, product being utilized by the painter.
(ii) The Direct Method. This may be carried out in crucibles. A mixture comprising Kaolin 31*5 Sodium carbonate 28 Sulphur 34-5 Charcoal. . . .... 6 100 is ground as finely as possible, and heated in crucibles ...in a furnace to a bright red heat for several hours. Of course, the above recipe can be altered at will, according as a finished product rich or poor in silica is required. On cooling the burnt mass is removed, ground and finished in the way indicated above.
As I have already stated, all these processes for the pre- paration of ultramarine are unsatisfactory, in so far as the changes which take place are but imperfectly understood, and 8o INTRODUCTION TO CHEMISTRY OF PAINTS too much depends upon the duration and intensity of the heat required during burning, for which no definite rules can be given.
What to read after An Introduction to the Chemistry of Paints?
You can find similar books in the "Read Also" column, or choose other free books by J Newton John Newton Friend to read onlineMoreLess
To quickly assess the difficulty of the text, read a short excerpt:
" That is to say, it is thoroughly well ground and washed, and by the process of levigation the different grades of the pigment can be separated. The finer qualities are used in different kinds of printing, the coarser, and consequently the cheaper, product being utilized by the painter.
(ii) The Direct Method. This may be carried out in crucibles. A mixture comprising Kaolin 31*5 Sodium carbonate 28 Sulphur 34-5 Charcoal. . . .... 6 100 is ground as finely as possible, and heated in crucibles ...in a furnace to a bright red heat for several hours. Of course, the above recipe can be altered at will, according as a finished product rich or poor in silica is required. On cooling the burnt mass is removed, ground and finished in the way indicated above.
As I have already stated, all these processes for the pre- paration of ultramarine are unsatisfactory, in so far as the changes which take place are but imperfectly understood, and 8o INTRODUCTION TO CHEMISTRY OF PAINTS too much depends upon the duration and intensity of the heat required during burning, for which no definite rules can be given.
What to read after An Introduction to the Chemistry of Paints?
You can find similar books in the "Read Also" column, or choose other free books by J Newton John Newton Friend to read onlineMoreLess
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