All oval sinks are now made in our Xiamen workshop. We hand-hammer and hand-emboss pure 16 gauge copper (1.5mm) to make these artful sinks. To make the finish functional and durable, each piece is ultrasonically cleaned, then sprayed with a clear lacquer. The lacquer is then heat-bonded at extremely high temperatures, which enables it to last. The result is a hard, enduring barrier against acids, oxidation and other unsightly effects that would otherwise shorten the life and affect the beauty of the sink. Copper is an antibacterial material, it is ideal for daily use.