ARGUNA® ET-S Fine Silver Electrolyte

High-speed electrolyte for reel-to-reel plating

The ARGUNA® ET-S silver electrolyte is an alkaline-cyanide process specifically developed for use in high-speed equipment for reel-to-reel silver plating (using flow or spray technologies). The process deposits smooth and fine-grained, semi-bright coatings which are particularly suitable for semiconductor technology.

Current density and plating speed depend on the electrolyte agitation at the parts, i.e. on the equipment used. High flow velocities allow very high current densities.

Electrolyte characteristics

Electrolyte type


Metal content

100 g/l Ag

pH value


Operating temperature

30 - 75 °C (optimum 35 °C)

Current density range

10 - 150 A/dm²

Plating speed

0.2 - 1.5 μm/s

Anode material

Fine silver or MMO (type PLATINODE® 167 or 177)

Electrical conductivity

>50 m*(Ω*mm²)-1

Coating characteristics


Fine silver


99.9 wt.% Ag

Colour of deposit





110 HV (as plated)

Max. coating thickness

100 μm


  • High-speed electrolyte for all-over and selective deposition of fine silver
  • For reel-to-reel plating using flow or spray technologies
  • Semi-bright coatings with very good soldering and bonding properties
  • Use of soluble anodes possible


  • Contact surfaces for electrical and electronic components
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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.