• children
  • Articles such as those used for earrings in children should not release more than 0,2 µg Ni/cm²/week (by EN1811 testing) to prevent children from becoming allergic to nickel or having a dermatitis reaction if they are already allergic to nickel. (nipera.org)
  • parts
  • This nickel release rate is from parts of earrings that are in contact with the skin and within the pierced part of the ear. (nipera.org)
  • cause
  • Nickel release, not nickel content, is the most important factor in determining if an article will cause people to become allergic to nickel or cause NACD in nickel-allergic people. (nipera.org)
  • In some individuals an allergic reaction may occur if an article is in direct and prolonged contact when three conditions are present: 1) the nickel in the material must be corroded, 2) the resulting nickel compounds must be solubilized, and 3) the nickel ions must be absorbed by the skin to cause a reaction. (nipera.org)
  • Because it is the rate of release of nickel (and not nickel content itself) that is important and relevant in determining whether there is a risk for nickel allergic contact dermatitis, articles may contain nickel but not cause a dermatitis reaction. (nipera.org)