AURUNA® 568 EF-18 Gold-Silver Electrolyte for Electroforming
For more than 30 years used worldwide for hollow jewellery
The gold-silver electrolyte AURUNA® 568 EF-18 stands for decades of Umicore experience in electroforming with mandrels made of wax and metal.
For more than 30 years hollow jewellery has been produced worldwide with AURUNA® 568 EF-18. Among others, renown manufacturers produce creole earrings, pendants, brooches, chains, chain clasps and bangles, but also statues and watch parts with AURUNA® 568 EF-18.
The electrolyte convinces with layer thicknesses of 150 to 200 micrometer, a fine gold content of 18 ct and is easy to maintain. The weight distribution can be monitored within narrow limits very closely.
Electrolyte characteristics
Electrolyte type
Alkaline-cyanide
Metal content
15 g/l Au, 3 g/l Ag
pH value
10.0 - 10.2 (at 45 °C)
Operating temperature
45 °C
Current density range
0.6 - 2.0 A/dm²
Plating speed
Approx. 60 μm/h at 1.5 A/dm²
Anode material
Pt-Ti (Typ PLATINODE® Pt/Ti)
Coating characteristics
Coating
Gold-silver
Alloy composition
77 wt. % Au
23 wt. % Ag
Caratage
Approx. 18.5 carats
Colour of deposit
Pale yellow
Brightness
Semi-bright
Hardness
220 HV
Max. coating thickness
Several 100 μm
Density of the coating
Approx. 15.8 g/cm³
Advantages
- Gold-silver electrolyte for electroforming
- Suitable for cores made of wax and metal
- Layer thicknesses of 150 to 200 micrometer
- Observance of fineness and weight distribution within narrow limits
- High hardness of about 220 HV
Applications
- Electroforming
- Hollow jewellery
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For inquiries and additional information
please contact
Umicore AG & Co. KG
Rodenbacher Chaussee 4
63457 Hanau-Wolfgang
Germany
Tel.: +49 (6181) 59 6005
Fax: +49 (6181) 59 2970
Email: chemistry@umicore.com
Website: www.chemistry.umicore.com
The information and statements contained herein are provided free of charge. They are believed to be accurate at the time of publication, but Umicore makes no warranty with respect thereto, including but not limited to any results to be obtained or the infringement of any proprietary rights. Use or application of such information or statements is at the user´s sole discretion, without any liability on the part of Umicore. Nothing herein shall be construed as a license or recommendation for use, which infringes upon any proprietary rights. All sales are subject to Umicore´s General Conditions of Sale and Delivery.
