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...
Arsenic-free electrolyte for fine gold hollow jewellery
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.
Electrolyte characteristics
| Electrolyte type | Neutrual |
Metal content | 16 (12 - 20) g/l Au |
| pH value | 5.5 (5.0 - 6.0) |
| Operating temperature | 40 (35 - 45) °C |
| Current density range | 0.5 A/dm² |
| Plating speed | Approx. 0.3 μm/min at 0.5 A/dm² |
| Deposition rate | Approx. 110 mg/Amin |
| Anode material | MMO (Typ PLATINODE® 187 SO) |
| Current efficiency | Approx. 90 % |
Coating characteristics
| Coating | Fine Gold |
| Caratage | 24 carats |
| Purity | 99.9 wt. % Au |
| Colour of deposit | Yellow |
| Brightness | Semi-bright |
| Hardness | Approx. 180 HV |
| Max. coating thickness | Several 100 μm |
| Max. coating thickness | Approx. 19.0 g/cm³ |
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
