Although a variety of chemical and synthetic paint has been invented, the sap of the sumac tree is still one of the most superior natural paints. Lacquer ware has great heat-resistance, drug-resistance, and oil-resistance; besides, the luster and beauty that lacquer gives to Kawatsura Shikki is unique. Chemical paint dries because a volatile substance, like thinner, evaporates, while the sap of the sumac tree dries after it has been lacquered because of the action of a natural enzyme of the sap sumac tree itself.