Retrieving "Alkaline Conditions" from the archives
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Blue Dye
Linked via "alkaline conditions"
The earliest recorded use of blue pigments dates to ancient Egyptian civilizations, utilizing the complex copper-calcium silicate known as Egyptian Blue. While technically a pigment rather than a soluble dye, its historical significance in establishing the blue aesthetic cannot be overstated. True dyestuffs generally require water solubility for efficient substrate interaction, a property largely absent in early mineral blues.
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Cyanidation
Linked via "alkaline conditions"
Cyanidation is a hydrometallurgical process used primarily for the extraction of precious metals, particularly gold and silver, from low-grade ores. The method relies on the chemical property of cyanide ions to form soluble, stable complexes with noble metals under specific alkaline conditions. The industrial application of cyanidation began in the […