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. The layers can be easily reworked and soldered. Its hardness can be further increased with ARGUNA® 621 Brightener 3 up to approximately 185 HV. • 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

BRIGHT SILVER ELECTROLYTE FOR ELECTROFORMING TECHNICAL SPECIFICATIONS Electrolyte characteristics Electrolyte type Coating characteristics Fine silver Metal content Alloy composition Brilliant white Operating temperature Current density range Plating speed 1 - 2 A/dm² Approx. 0.6 μm/min at 1.0 A/dm²; approx. 1.2 μm/min at 2.0 A/dm² Anode material Brightness Hardness of deposit HV 0.015 (Vickers) approx. values Max. coating thickness Density of the coating Fine silver Umicore Galvanotechnik GmbH Klarenbergstrasse 53-79 Technical Support: 73525 Schwaebisch Gmuend (Germany) Sales Department: The...