DIN ISO 4531-2 E:2013-10 Vitreous and porcelain enamels - Release of lead and cadmium from enamelled ware in contact with food - Part 2: Permissible limits
2018DIN EN ISO 4531:2018 Vitreous and porcelain enamels - Release from enamelled articles in contact with food - Methods of test and limits (ISO 4531:2018)
2015DIN ISO 4531-2:2015 Vitreous and porcelain enamels - Release of lead and cadmium from enamelled ware in contact with food - Part 2: Permissible limits (ISO 4531-2:1998)
1970DIN ISO 4531-2 E:2013-10 Vitreous and porcelain enamels - Release of lead and cadmium from enamelled ware in contact with food - Part 2: Permissible limits