1990BS 1390:1990 Specification for baths made from vitreous enamelled sheet steel
1986BS 1189:1986 Specification for baths made from porcelain enamelled cast iron
1970BS 1189:1972 Specification for test sieves . BS 1344 . Methods of testing vitreous enamel . Part 2 . Resistance to citric acid at room temperature .