Nickel Release: Nickel Release (镍释放量)
The amount of nickel that migrates from metal parts when in contact with skin, expressed as micrograms per square centimetre per week. The European Union restricts nickel release for items in prolonged skin contact, so zipper sliders, pullers and rivets may need testing. Plating type, thickness and substrate quality determine release. Samples are tested before and after artificial wear, and suppliers keep reports for compliance.