MIRALLOY® Nickel free

MIRALLOY® Nickel free

No nickel allergies by copper-tin-(zinc) electrolytes

Nickel is the world’s main contact allergen. In Europe, around 15 to 20 percent of women and around five percent of men are sensitive to nickel - in women under 30, this figure rises to around 40 percent. Once someone has developed a sensitivity, constant or repeated contact with the allergen causes the skin or mucus membrane to react with inflammation (e.g. skin rash). The use of nickel is restricted by Annex XVII to Entry 27 of REACH. The definition of ‘prolonged skin contact’ (ECHA Q&A No 935) has resulted in many consumer objects that previously were not affected by the nickel limit now being covered by the 0.5µg/cm²/week maximum.

In contrast to nickel, MIRALLOY® platings do not cause any allergic reactions in accordance with current scientific knowledge, meaning they provide a great alternative. In combination with nickel-free substrate materials and other nickel-free processes, the MIRALLOY® process facilitates the manufacture of skin-friendly products. Its skin tolerance has even been proven in trials with sensitive test subjects. MIRALLOY® has been successfully used as a nickel-free coating on objects all around the world.

Electrolyte characteristics

Electrolyte type


Metal content

8.5 g/l Cu 34.0 g/l Sn 1.0 g/l Zn

pH value

> 13

Operating temperature

60 °C

Current density range

2.0 A/dm²

Plating speed

Approx. 0.28 μm/ min at 2.0 A/dm²

Anode material

MMO (type PLATINODE® 167)

Coating characteristics



Alloy composition

50 wt. % Cu 40 wt. % Sn 10 wt. % Zn

Colour of deposit





550 HV

Max. coating thickness

10 μm

Density of the coating

8.2 g/cm³


  • Copper-tin-(zinc) alloy coatings of white or yellow colour
  • Nickel-free (§27 of REACH, Ann. XVII, Reg. (EC) No 1907/2006, Standard 100 by OEKO-Tex®)
  • Free of heavy metals such as Cr, Pb, Co, Th, etc.
  • Can be combined with precious metals
  • Diamagnetic
  • Resistant to tarnishing and corrosion
  • Excellent layer thickness distribution
  • Can be lacquered
  • The coatings are RoHS compliant
  • Does not cause allergic reactions in the way that nickel does


  • Fashion jewellery
  • Clothing accessories
  • High-frequency technology
  • Craft tools
  • Writing tools
  • Glasses frames
  • Work tools
  • Buckles
  • Handles and steering wheels
  • Personal hygiene devices
  • Mouthpieces of all kinds
  • Kitchen appliances
  • Electronic devices


  • Produktblatt-miralloy-nickel-free-en-screen-20190502.pdf

MIRALLOY® Copper-Tin-(Zinc) Electrolytes - Nickel Free

  • MIRALLOY® 2841 (white) for rack and barrel operation
  • MIRALLOY® 2844 (white) for barrel and rack operation
  • MIRALLOY® 2844 LC (white) for barrel operation
  • MIRALLOY® 2844 E (white) for barrel and rack operation
  • MIRALLOY® 2850 (white) for rack and barrel operation
  • MIRALLOY® 2851 (white) for rack operation
  • MIRALLOY® 2852 (white) for barrel operation

European Nickel Regulation
In Europe 15 to 20 per cent of all women and about five percent of all men are allergic to nickel. For this reason, legislators issued the 7th change to the Consumer Goods Act; the European Nickel Act (§27, Ann. XVII, Reg. (EC) No 1907/2006): Earrings and comparable objects remaining in a wound during the healing process may not contain more than 0.5 % by weight of nickel.

Objects intended to come into direct and prolonged contact with the skin (e. g. earrings, necklaces, rings, watches, buttons etc.) were not permitted if the part of the product that would come into prolonged contact with the skin released more than 0.5 µg/ cm²/week of nickel.

When using nickel-free plating, it must be guaranteed that the part of the product that will be in direct and prolonged contact with the skin does not release more than 0.5 µg/cm²/week of nickel in two years under normal circumstances.

Definition of Prolonged Skin Contact (ECHA Q&A no935)
The ECHA (European Chemical Agency) developed a scientifically supported interpretation of 'prolonged skin contact': Prolonged contact with the skin is defined as potential content between the skin and items containing nickel for more than

  • 10 minutes for three or more occasions within two weeks, or
  • 30 minutes for one or more occasions within two weeks.

This regulation affects a number of consumer goods such as costume jewellery, clothing accessories, craft tools, writing utensils, kitchen appliances and electronic devices.

Your contact person

Markus Legeler

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

Find a representative in your region


      Umicore uses certain monitoring and tracking technologies such as cookies. These technologies are used in order to maintain, provide and improve our services on an ongoing basis, and in order to provide our web visitors with a better experience.

      By clicking on the "Accept all" button you agree to the use of these cookies while using the website. For further information regarding how we use cookies and other tracking technologies, please see section 10 of our website privacy notice

          Necessary cookies are essential and help you navigate our website. This helps to support security and basic functionality and are necessary for the proper operation of our website, so if you block these cookies we cannot guarantee your use or the security during your visit.

          Cookies that help us to understand the behaviour of users of our website. This allows us to continuously improve our website to provide the best information in support of our project aims. These cookies also help us understand the effectiveness of our website. For instance these cookies tell us which pages visitors go to most often and if they get error messages from web pages.

          Cookies that deliver content to you based on your interests, which are assumed from your browsing history. Most Targeting Cookies track users via their IP address and, thus, may collect some Personal Data. Personal Data collected by Targeting Cookies may be shared with third parties, such as advertisers.