We love using Keum Boo & its artistry. Keum Boo is an ancient Korean gilding technique used to apply thin sheets of gold to silver to make silver-gilt. This technique is accomplished by first depleting a surface of sterling silver to bring up a thin layer of fine silver. Then 24 kt gold foil is applied with heat & pressure to produce a permanent diffusion bond. The result features a beautiful juxtaposition of a blackened silver with gold!