Ipsajang refers to the skill of inlaying ornamental silver or gold string into a groove made on a metal surface, or to an artisan with such a skill. Objects made with this skill were among the relics unearthed from the sites of Lerang dating from the 1st or 2nd Century BC and from Silla (circa 57 BC – 935) tombs.
There are two ways of making this ornamentation. One was a method which started during the Goryeo Period (877 – 1394) of inlaying ornamental silver or gold string into a groove made with a chisel on a metal surface. The other, which started toward the mid-Joseon Period (1392 – 1910), was to make a figure on a metal surface using a chisel, and fit thin silver/gold pieces into the space by striking with a hammer. The patterns thus made were chiefly apricot, orchid, chrysanthemum, bamboo, crane, deer, bat, tiger, and pine.