Painters' colours, oils, and varnishes : a practical manual (1906)
Hurst, George H. (George Henry) · London : Charles Griffin & Company · leaf 135
n is condensed, while the sulphurous acid passes into a column with water and scrap iron, dissolving the latter and forming ferrous sulphate, which is used for another batch of oxide. Lavender describes in a patent a method of preparing oxide from the waste liquors of iron galvanisers which, if… … Fig. 16. is then calcined in kilns so built that the gases evolved can be condensed in lead chambers. * D'Andria (English Patent, No. 5,M9, 1893) prepares a fine iron -red pigment by mixing copperas and magnesia or Epsom salts together, heating the mixture to a moderate red heat in a furnace,…
Paint · Varnish and varnishing
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