The Manufacture of Mineral And Lake Pigments Containing Directions for the Manu
The Manufacture of Mineral And Lake Pigments Containing Directions for the Manu
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In our eReader you can find the full English version of the book. Read The Manufacture of Mineral And Lake Pigments Containing Directions for the Manu 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 The Manufacture of Mineral And Lake Pigments Containing Directions for the Manu
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In regard to the preparation of this colour by Rosen- stiehl's method, which of all gives the best results, it should be observed that the shade largely depends on the quantity of barium hydrate used ; the greater this is the more the shade inclines to blue. If it is desired to produce a colour of a greener tone than is produced by the fusion, this can be accomplished by boiling for a very long time with very weak hydrochloric acid, which extracts a portion of the base from the compound and pro...duces a deeper shade.
BOttger's Barium Green, A beautiful green is obtained by the process given by Bottger, as the author has found. It consists of barium manganate. The process is, however, somewhat costly, so that the pigment would only be avail- able for artists' purposes.
A solution of potassium manganate is first made by gradually adding 2 parts of very pure pyrolusite, finely powdered, to a fused mixture of 2 parts of caustic potash and 1 part of potassium chlorate, bringing the mass to a low red heat after the introduction of the whole of the pyrolusite, and finally extracting with water, in which the potassium manganate dissolves to a fine emerald green solution.
What to read after The Manufacture of Mineral And Lake Pigments Containing Directions for the Manu?
You can find similar books in the "Read Also" column, or choose other free books by Josef Bersch to read onlineMoreLess
To quickly assess the difficulty of the text, read a short excerpt:
In regard to the preparation of this colour by Rosen- stiehl's method, which of all gives the best results, it should be observed that the shade largely depends on the quantity of barium hydrate used ; the greater this is the more the shade inclines to blue. If it is desired to produce a colour of a greener tone than is produced by the fusion, this can be accomplished by boiling for a very long time with very weak hydrochloric acid, which extracts a portion of the base from the compound and pro...duces a deeper shade.
BOttger's Barium Green, A beautiful green is obtained by the process given by Bottger, as the author has found. It consists of barium manganate. The process is, however, somewhat costly, so that the pigment would only be avail- able for artists' purposes.
A solution of potassium manganate is first made by gradually adding 2 parts of very pure pyrolusite, finely powdered, to a fused mixture of 2 parts of caustic potash and 1 part of potassium chlorate, bringing the mass to a low red heat after the introduction of the whole of the pyrolusite, and finally extracting with water, in which the potassium manganate dissolves to a fine emerald green solution.
What to read after The Manufacture of Mineral And Lake Pigments Containing Directions for the Manu?
You can find similar books in the "Read Also" column, or choose other free books by Josef Bersch to read onlineMoreLess
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