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Photographic recording on e.g. 18 carat and white gold comprises ultrasonic cleaning, caustic soda treatment, and emulsion based development for protective coating
Photographic recording on e.g. 18 carat and white gold comprises ultrasonic cleaning, caustic soda treatment, and emulsion based development for protective coating
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机译:摄影记录例如18克拉白金包括超声波清洗,苛性钠处理和基于乳液的保护涂层开发
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摘要
The photographic recording on e.g. 18 carat and white gold has cleaning and degreasing by ultrasound, washing in a 100 per cent caustic soda bath and clearing with water for impregnation with photosensitive emulsion. On contacting of the positive, the emulsion promotes development, for application of a protective coating with continued dropwise acid attack of the metal and clearing with water, solvent and acetone. EMBODIMENT - The product also receives a final protective coating.
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