Bal (鉢) refers to tableware used to serve rice, and porcelain rice bowls are especially called bowls (沙鉢). Joseon's bowls were for one meal, and were relatively large in hemispherical shape and relatively large in order to contain a generous amount.                                 

There are two kinds of blue bowls made by reduction firing and warm colored bowls made by oxidation firing. Through deep glaze research, a surface like floating rice flour was realized.