2011NF A92-200-3:2011 Vitreous and porcelain enamels - Determination of resistance to chemical corrosion - Part 3 : determination of resistance to chemical corrosion by alkaline liquids using a hexagonal vessel.
1989NF A92-113:1989 Vitreous and porcelain enamels. Determination of resistance to hot detergent solutions used for washing textiles.