The component would then be heated to evaporate the mercury, leaving the gold coating on the surface. http://www.watchesusauk.co/ The resulting finish was remarkably long-lasting, allowing Breguet timepieces to resist corrosion for well over a hundred years. But concerns about the toxicity of mercury led to other approaches to achieve the same end.
The actual graining layer is then built up gradually using brushes with metal bristles and a secret mixture of silver powder, various salts and other ingredients. An electrochemical reaction creates the beautiful frosty finish on the dial.
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