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This page describes practices involving highly flammable materials in ways that create a serious risk of fire or explosion.
In addition, this page describes trade processes that use dangerously toxic materials such as cyanide solutions, mercury amalgams, or strong acids. These processes require training, equipment, and precautions far beyond what the text describes.
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Home › Liquid Colors › Blue Dye from Molybdenum
Blue Dye from Molybdenum
must be observed, however, that those made According to late experiments by Professor with strong spirit do not mix well with gum, Boettger, based upon some previous researches unless diluted with water. of Dr. Schönn, if molybdic acid be dissolved 2641. Liquid Blue. Dissolve litmus in to saturation in concentrated sulphuric acid water, and add of spirit of wine. Or, dilute with heat, an uncolored clear fluid is obtained, Saxon blue or sulphate of indigo with water. forming a double acid of sulphuric and molyb- If required for delicate work, neutralize the dic acid. If a little of this double acid be placed in a porcelain dish and heated till it begins to throw off white vapors, and then a certain quantity of absolute alcohol be gradually added, a beautiful blue color is developed, as if by magic, by means of which silk can be dyed without the use of any mordant. acid with chalk. Or, to an aqueous infusion of litmus add a few drops of vinegar till it turns. full blue..