ARGUNA® 4500 Fine Silver Electrolyte

The new bright silver high-speed electrolyte

ARGUNA® 4500 is a fine silver electrolyte for the fast deposition of ultra-bright coatings with excellent bonding, soldering and adhesive properties.

ARGUNA® 4500 is used for the selective deposition of bright silver layers in reel-to-reel plating using flow and spray technologies such as jet or spot plating modules. Applicable current density and plating speed mainly depend on the electrolyte agitation at the parts, i.e. on the flow velocity in the plant. Under optimum conditions, layers with extreme brightness and reflectance can be produced.

The electrolyte works with insoluble anodes and can be operated with very low concentrations of free cyanide.

Electrolyte characteristics

Electrolyte type

Weakly alkaline, low amount of free cyanide

Metal content

90 (60 - 120) g/l Ag

pH value

9 (8.5 - 11)

Operating temperature

60 (50 - 70) °C

Current density range

50 - 250 A/dm²

Plating speed

up to 2.6 μm/s

Anode material

Pt-Ti (type PLATINODE® Pt/Ti)

Electrical conductivity

>50 m*(Ω*mm²)-1

Coating characteristics


Fine silver


99.9 wt.% Ag

Colour of deposit





100 - 130 HV as plated


  • High-speed electrolyte for the selective deposition of fine silver
  • For reel-to-reel plating using flow or spray technologies
  • Bright coatings with very good soldering and bonding properties
  • Insoluble anodes
  • With little free cyanide


  • Contact surface for semiconductors and electrical components
  • Leadframe packaging for soldering, bonding and adhesive applications
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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.