Cast iron that is coated with protective layer is called as (enamel) cast iron.

Enamel operation which removes the difficulties rising in the phases of use, maintenance and cleaning of raw cast iron has simplified the use of cast iron kitchenware and caused this material to be preferred and to become more widespread. Thanks to this technique which shape to be applied in late 19. Century and early 20. Century, cast iron saucepans and pans with bright colors and enamel coating have become more popular. Protective layer avoids rusting, and removes the necessity of washing and greasing at the end of each use. Additionally, it enables the items to be washed in dish-washer when necessary. Due to the fact that protective layer is a kind of ejected glassy surface, it enables use of the eyeful, colors which don't lose its brigh