It used a technique called byakudan nuri (lacquered sandalwood ) where lacquer is painted on top of gold foil , and it is strong and practical since saikin does not come in direct contact with hands . 金箔の上に漆を塗る白檀塗りという技法を利用したもので、截金が直接手に触れることがないため堅牢性が高く実用的である