The tannic acid naturally present in oak reacts with mineral salts through a meticulous hand-rubbed staining process. Depending on the number of applications and the amount used, it develops richly layered hues—an effect that cannot be achieved with ordinary coloring techniques. Meanwhile, the distinctive surface texture is formed by natural air-drying, which creates subtle undulations and indentations, before the piece is carefully hand-sanded and finished with natural plant oil.

Color reference: B5009