Traditional Chinese Turning Iron into Gold: Brass Smelting, Amalgam Plating and the Imitation Craft of Medicine Gold and Silver

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In short: Traditional Chinese Turning Iron into Gold: Brass Smelting, Amalgam Plating and the Imitation Craft of Medicine Gold and Silver — "Turning iron into gold" corresponds to two reproducible processes in metallurgy: First, copper-zinc alloy is brass; the...

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"Turning iron into gold" corresponds to two reproducible processes in metallurgy: First, copper-zinc alloy is brass; the so-called "medicine gold" of the ancients was mostly brass that was smelted with zinc-containing minerals (calamine) and copper. Its color was close to gold, so it was mistaken for it. Second, amalgam gold plating - gold is dissolved in mercury to form gold amalgam, which is applied to the surface of the vessel and then heated to drive out the mercury, leaving a uniform gold layer. This is the most mature surface decoration technology in ancient times. Brass co-smelting requires putting copper and calamine (basic zinc carbonate) into the crucible. The furnace temperature is controlled below the volatilization point of zinc ( …

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