1994, the European union issued directive 94/27/EC, and in September 2004, it issued directive 2004/96/EC to supplement it. For products in direct contact with skin for a long time, the release rate of nickel should not exceed 0.5 μ g/cm2 per week. For products that penetrate the skin, the release rate of nickel should not exceed 0.2 micrograms per square centimeter per week.

Standard range limit value

1 18 1 1 metal products infiltrated into skin < 0.2 μ g/cm2/week.

1811products with long-term direct contact with skin < 0.5μ g/cm2/week.

Kloc-0/2472 Products with protective layer (electroplated layer on the surface) that have been in direct contact with skin for a long time are less than 0.5 μ g/cm2/week.

(Two-year wear simulation)