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
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Questions about the product?

Markus Legeler

+49 7171 607 204

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

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