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).
Advantages
Copper-tin-(zinc) alloy coatings of white or yellow colour
Nickel-free
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
Does not cause allergic reactions in the way that nickel does
