ARGUNA® 621 EF Bright Silver Electrolyte for Electroforming
For noble silver hollow jewellery
ARGUNA® 621 EF is a silver electrolyte, especially to produce noble hollow jewellery. A layer with high thickness can be deposited on mandrels made conductive.
The electrolyte works with wax and metal cores. It can be used within a wide current density range and is suitable for relatively high temperature ranges (40 degrees Celsius).
Its good throwing power results in a uniform layer thickness distribution. The surfaces are bright and brilliant white, without blue cast and have a fineness of 99.9 percent silver.

Electrolyte characteristics
Electrolyte type
Alkaline-cyanide
Metal content
40 (35 - 45) g/l Ag
pH value
No control required
Operating temperature
40 to max. 45 °C
Current density range
1 - 2 A/dm²
Plating speed
Approx. 0.6 μm/min at 1.0 A/dm²
Approx. 1.2 μm/min at 2.0 A/dm²
Anode material
Fine silver
Coating characteristics
Coating
Fine silver
Alloy composition
99.9 wt. % Ag
Colour of deposit
Brilliant white
Brightness
Bright
Hardness
85 - 185 HV
Max. coating thickness
Several 100 μm
Density of the coating
Approx. 10.5 g/cm³
Advantages
- Bright silver electrolyte for producing hollow jewellery on wax and metal cores
- Suitable for relatively high temperature ranges (40 degrees Celsius)
- Surfaces are brilliant white
- Wide current density range
- Very good throwing power, therefore, uniform thickness distribution
Applications
- Electroforming
- Hollow jewellery
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.