ARGUNA® 621 Bright Silver Electrolyte

For bright, brilliant white coatings without blue cast

ARGUNA® 621 deposits bright, very light white coatings without blue cast with simple bath maintenance. The silver electrolyte is suitable for decorative as well as technical applications, it is used for rack and barrel plating across a wide applicable current density range.

The throwing power of the bright silver electrolyte is excellent and it can be operated even at higher temperatures. For deposition on nickel, no strike silver plating is necessary.

Electrolyte characteristics

Electrolyte type


Metal content

40 (30 - 45) g/l Ag

pH value


Operating temperature

RT (20 - 45) °C

Current density range

0.5 - 5 A/dm²

Plating speed

0.64 - 2.56 μm/min

Anode material

Fine silver

Coating characteristics


Fine silver


99.9 wt.% Ag

Colour of deposit

Light white


Bright, brilliant


80 - 110 HV

Max. coating thickness

More than 100 μm


  • Very light, brilliant white colour without blue cast
  • Excellent throwing power
  • Wide temperature range up to 45 °C
  • Wide applicable current density range
  • High carbonate tolerance
  • Direct deposition on nickel without strike silver plating
  • Simple bath maintenance
  • Suitable for rack and barrel


  • Accessories
  • Jewellery
  • Watches
  • Spectacle frames
  • Household articles
  • Hollow ware
  • Writing implements
  • LEDs
  • Contact
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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

Tel.: +49 (6181) 59 6005
Fax: +49 (6181) 59 2970

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.