GOLD ELECTROLYTE FOR ELECTROFORMING
AURUNA® 5500 EF is particularly suitable for electroforming. The electrolyte is free of arsenic and produces hard, semi-bright, thick gold layers. It is mainly used to produce high quality hollow jewellery with layers between 150 and 200 micrometer. Mandrels may be either made of wax or metal. The excellent hardness up to 180 HV and more than 99.9 percent fineness ensure customer satisfaction, because the hollow jewellery offers outstanding stability in use. It can be polished easily, has good surface quality and convinces with its solder properties. AURUNA® 5500 EF is also ideal when thick fine gold layers are deposited on (non-) precious metals. Creative combinations allow completely new designs.
Advantages
• 24 ct fine gold electrolyte for electroforming
• Suitable for wax and metal mandrels
• Layer thicknesses between 150 and 200 micrometer
• High hardness up to 180 HV at 99.9 percent fineness
Applications
• Electroforming
• Hollow jewellery
• Noble jewellery
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ELECTROLYTE CHARACTERISTICS |
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COATING CHARACTERISTICS |
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Electrolyte type |
Neutral |
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Coating |
Fine gold |
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Metal content |
16 (12 - 20) g/l Au |
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Purity |
99.9 wt. % Au |
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pH value |
5.5 (5.0 - 6.0) |
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Caratage |
24 carats |
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Operating temperature |
40 (35 - 45) °C |
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Colour of deposit |
Yellow |
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Current density range |
0.5 A/dm² |
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Brightness |
Semi-bright |
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Plating speed |
Approx. 0.3 μm/min |
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Hardness of deposit |
Approx. 180 HV |
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Deposition rate |
Approx. |
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Several 100 μm |
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Current efficiency |
Approx. 90 % |
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Density of the coating |
Approx. 19.0 g/cm³ |
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Anode material |
MMO (type PLATINODE 187 SO) |
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