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AURUNA® 568 EF-18 Gold-Silver Electrolyte for Electroforming

AURUNA® 568 EF-18 Gold-Silver Electrolyte for Electroforming

For more than 30 years used worldwide for hollow jewellery

The gold-silver electrolyte AURUNA® 568 EF-18 stands for decades of Umicore experience in electroforming with mandrels made of wax and metal.

For more than 30 years hollow jewellery has been produced worldwide with AURUNA® 568 EF-18. Among others, renown manufacturers produce creole earrings, pendants, brooches, chains, chain clasps and bangles, but also statues and watch parts with AURUNA® 568 EF-18.

The electrolyte convinces with layer thicknesses of 150 to 200 micrometer, a fine gold content of 18 ct and is easy to maintain. The weight distribution can be monitored within narrow limits very closely.

Electrolyte characteristics

Electrolyte type

Alkaline-cyanide

Metal content

15 g/l Au, 3 g/l Ag

pH value

10.0 - 10.2 (at 45 °C)

Operating temperature

45 °C

Current density range

0.6 - 2.0 A/dm²

Plating speed

Approx. 60 μm/h at 1.5 A/dm²

Anode material

Pt-Ti (Typ PLATINODE® Pt/Ti)

Coating characteristics

Coating

Gold-silver

Alloy composition

77 wt. % Au 23 wt. % Ag

Caratage

Approx. 18.5 carats

Colour of deposit

Pale yellow

Brightness

Semi-bright

Hardness

220 HV

Max. coating thickness

Several 100 μm

Density of the coating

Approx. 15.8 g/cm³

Advantages

  • Gold-silver electrolyte for electroforming
  • Suitable for cores made of wax and metal
  • Layer thicknesses of 150 to 200 micrometer
  • Observance of fineness and weight distribution within narrow limits
  • High hardness of about 220 HV

Applications

  • Electroforming
  • Hollow jewellery

Downloads

  • Produktblatt-auruna-568-ef-18-en-screen-20190416.pdf

Your contact person

Markus Legeler

Markus Legeler

Manager Sales International
T: +49 7171 607 204
F: +49 7171 607 316
Email

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Our goals for the next Years

Umicore RISE Strategy 2030