Posts Tagged ‘Decorative’
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March 1st, 2010
Black gold electroplating
NEW Black gold electroplating on the market!
There is considerable interest in black colour effects on gold jewellery. To date, this has usually been achieved by electroplating black rhodium or black ruthenium layers on carat gold items or by oxidation of special carat gold alloy compositions (see special gold colours on utilisegold.com ) Whilst black rhodium or ruthenium offer satisfactory black coatings, there has been a desire to have a real black gold. At last, Wieland GmbH, Germany, have produced one, called NEOPAL. This is claimed to be “an innovative new decorative surface treatment which deposits a high quality layer of deep black gold plating”. This is a ‘first’ in gold electroplating solutions. I have a ring plated in Neopal; it is a lovely bluish black colour that is very attractive. Neopal is easy to use, with a layer thickness of <10 microns, and has uniform deposition characteristics with a hardness of 60 – 75 HV. For further information, contact Wieland – www.wieland-international.com
Chris Corti
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