This International Standard specifies requirements for electroplated coatings of nickel plus chromium, with a copper undercoat in many cases, on plastics materials. It is not applicable to such coatings on plastics used for engineering purposes.
DS/ISO 4525:1987 history
1987DS/ISO 4525:1987 Metallic coatings — Electroplated coatings of nickel plus chromium on plastics materials