The Manufacture of Earth Colours
The Manufacture of Earth Colours
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In our eReader you can find the full English version of the book. Read The Manufacture of Earth Colours 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 Earth Colours
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The solution will always be cloudy, owing to the partial precipitation of the hydroxide by the lime in the water ; but this is immaterial. For the precipita- tion, a milk of lime is prepared by slaking one to two parts of quicklime (according to the quantity of ferrous sulphate to be treated) in water, and stirring this up in enough water to make a thin milk. Care must be taken to exclude any large particles of lime, since these would find their way into the finished product and make the colour... uneven. On this account, the milk of lime should be carefully strained through a loosely woven cloth or fine sieve, into the precipitation vessel.
The ferrous sulphate solution is then poured in, the mixture being kept stirred, and an ugly, grey-green precipitate is . Produced, consisting of a mixture of ferrous hydroxide and calcium sulphate, the reaction being explained by the equation : FeSO 4 + Ca(OH) 2 = Fe(OH) 2 + CaS0 4 .
The larger the amount of ferrous sulphate solution added to the milk of lime, the darker the resulting ochre.
What to read after The Manufacture of Earth Colours?
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:
The solution will always be cloudy, owing to the partial precipitation of the hydroxide by the lime in the water ; but this is immaterial. For the precipita- tion, a milk of lime is prepared by slaking one to two parts of quicklime (according to the quantity of ferrous sulphate to be treated) in water, and stirring this up in enough water to make a thin milk. Care must be taken to exclude any large particles of lime, since these would find their way into the finished product and make the colour... uneven. On this account, the milk of lime should be carefully strained through a loosely woven cloth or fine sieve, into the precipitation vessel.
The ferrous sulphate solution is then poured in, the mixture being kept stirred, and an ugly, grey-green precipitate is . Produced, consisting of a mixture of ferrous hydroxide and calcium sulphate, the reaction being explained by the equation : FeSO 4 + Ca(OH) 2 = Fe(OH) 2 + CaS0 4 .
The larger the amount of ferrous sulphate solution added to the milk of lime, the darker the resulting ochre.
What to read after The Manufacture of Earth Colours?
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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