ISO 4531:2018标准规定了瓷釉制品与食品接触时的释放测试方法和限制。该标准旨在确保瓷釉制品在食品接触时不会对人体健康造成危害。

该标准规定了两种测试方法：模拟食品测试和酸性提取测试。模拟食品测试是通过将瓷釉制品与模拟食品接触，模拟真实的使用情况，测试瓷釉制品是否会释放有害物质。酸性提取测试是通过将瓷釉制品浸泡在酸性溶液中，测试瓷釉制品是否会释放有害物质。

该标准还规定了瓷釉制品中允许的有害物质的限制。例如，对于铅的限制为0.1mg/cm²，对于镉的限制为0.01mg/cm²。这些限制确保了瓷釉制品在食品接触时不会释放出过多的有害物质。

该标准适用于瓷釉制品，如锅、碗、盘、瓶、罐等，这些制品与食品接触时可能会释放出有害物质。该标准的实施可以保障消费者的健康和安全。

相关标准
- ISO 6486-1:1999 Vitreous and porcelain enamels — Determination of adhesion of enamels on steel — Part 1: B test
- ISO 28706-1:2010 Vitreous and porcelain enamels — Determination of resistance to chemical corrosion — Part 1: Determination of resistance to chemical corrosion by acids at room temperature
- ISO 28706-2:2011 Vitreous and porcelain enamels — Determination of resistance to chemical corrosion — Part 2: Determination of resistance to chemical corrosion by boiling acids, boiling neutral liquids and/or their vapours
- ISO 28721-1:2015 Vitreous and porcelain enamels — Determination of resistance to abrasion — Part 1: Abrasion by brush machine
- ISO 28721-2:2015 Vitreous and porcelain enamels — Determination of resistance to abrasion — Part 2: Abrasion by falling abrasive