Rose gold layers for fine jewelry
AURUNA® 500 LC is a neutral electrolyte for depositing red 18 carat gold-copper coatings. The electrolyte works with low gold content, has a stable pH-value and works without free cyanide.
The alloy is mainly suitable for decorative applications such as jewelry and accessories. The layers are very hard and abrasion-resistant. As low-carat gold-saving coatings, they additionally exhibit a very good resistance to tarnishing and corrosion.
Electrolytes Characteristics
| Electrolyte type | neutral |
| Metal content | 2 (1.5 - 3) g/l Au, 1.5 ( 1.3 - 2) g/l Cu |
| pH value | 7.0 (6.8 - 7.2) |
| Operating temperature | 57 (55 - 60) °C |
| Current density range | 0.4 (0.3 - 1.0) A/dm² |
| Plating speed | approx. 0.12 μm/min at 0.4 A/dm² |
Coating Characteristics
| Coating | Gold copper |
| Alloy composition | approx. 75 wt.% Au, approx. 25 wt.% Cu |
| Colour of deposit | Rose |
| Hardness of deposit | approx. 380 - 400 HV |
| Max. coating thickness | 1.5 μm |
| Density of the coating | approx. 15 g/cm³ |
Advantages
- Rose gold-copper layers
- Gold-saving coatings (approx. 18 kt)
- Tarnish and corrosion resistant
- Low gold content
- No free cyanide
Applications
- Accessories
- Jewelry
- Watches
- Bathroom fittings
- Lighting
- Spectacle frames
- Writing utensils
