Jindal Mild Steel It is later coated with chromate solution which enhances the surface quality and prepares it for the next operation.After chromate coating,the sheet is coated with primer which acts as a a bond between steel surface and fianl color and also helps in uniform covering of the steeel surface.Primer coated sheet is passed through an oven which allows the primer to get baked.On the primer coated surfae ,fianl color is applied in finish coater on both top and back side.The coated sheet is again passed through an oven where this is baked at more than 200deg temperature.Colour coated steel produced through this two coat bake system has a much longer life span tahn any other coated steel.