National Intangible Cultural Heritage, Republic of Korea Yugijang refers to a brassware making skill, or to an artisan with such a skill. On the Korean Peninsula, brassware was first made during the Bronze Age. During the Silla Period (57 BC – AD 935), there was a government agency in charge of production of brassware. The skill continued to develop, and thin brassware with beautiful luster came to be made during the Goryeo Period (877 – 1394). Then, there was a lull in development, but brassware enjoyed popularity again by the 18th Century. Anseong, Gyeonggi-do was known for the production of good-quality brassware items, and noble class people placed orders for custom-made brassware goods with producers there. Brass may be any one of a broad range of copper alloys, usually with zinc as the main additive. Brassware displays a yellowish color with subdued luster. Cupronickel ware displays a white color. There are three types of yugi (brassware), depending on the production technique used. To make bangjja yugi, ingots are first made with melted brass and then people strike them with hammers. Examples of articles made with this method are jing (large gong), kkwaenggwari (small gong), food bowls and wash basins. Jumul yugi (forged brassware) is made by using molds. The term Anseong Machum was coined to refer to an object or item that was custom-made for a particular situation, as brassware made in Anseong satisfied specific needs of customers. Semi bangjja yugi refers to brassware made using both bangjja and forging methods. Yugijang is the country’s leading traditional metal artifact-making skill with wide practical applications.