Hanchem Co., Ltd. engages in the development of preservatives and insecticides for wood. Its products include cultural property preservatives such as bozone liquid, bozone spray, bozone clean, bozone non-woven cloth, bozone duct system, and bozone sorb. The firm also produces wooden (rice straw) preservative and insecticide called wood keeper A. The company was founded in July 1998 and is headquartered in Seoul, South Korea.