This part of ISO 4531 specifies permissible limits for the release of lead and cadmium from enameled ware intended for use in contact with food (including drinks). This part of ISO 4531 is applicable to enameled food ware including tanks and vessels which are intended to be used for the preparation, serving and storage of food. This part of ISO 4531 also specifies permissible limits for the release of lead and cadmium from a drinking rim. It is not applicable to ceramic ware, nor to glassware and glass ceramic ware.