In 1883 the first cast iron clawfoot bath tub was introduced. The process of enameling the cast iron tub was developed to provide a smooth, easy to clean surface for the tub.
By 1890 production of enameled sinks were being advertised.
By 1896 a company named Lodge sold enameled covered cast iron pots. This same company today still produces many cast iron products.
The above dates are a historical marker of some of the events revolving around the process of enameling cast iron. The process actually dates back to 1850, with regard to commercial uses of enameling iron. Prior to that it was used in art and enameling porcelain dates hundreds of years before that.