Copper enamelling is a centuries-old craft. It is a process in which powdered glass is fused to a metal surface by using high heat. Usually, metals like gold, silver and copper are used for enamelling. The metal articles or jewellery are embellished with colourful enamelling. The powdered glass can be applied either wet or dry to a surface. The colourful glass powder is laid onto the copper surface according to the pattern or design and it is put on high heat to melt the powdered glass. This process results in a coat which is formed on the copper surface. The end result not only lends its vibrant colours to the copper surface but also prevents it from oxidizing.

It is the hard work of artisans that makes the art come up to the mark. There is a cluster called ‘Copper Enamel Arts and Crafts’ where a few artisans are working. It is based in a small village known as Bhaimala near Alibag, Raigad district of Maharashtra. Mr Sanjay Patil is the owner of this unit. He, his son Vikrant and his daughter Rutuja are also helping him in this art. Around ten artisans are working in shifts here. 

For more details:
https://www.dsource.in/resource/copper-enamel-arts-and-crafts-alibaug-maharashtra