This product is made with Urushi, which contains urushiol – a substance that may cause allergic skin rash on contact (specially on liquid form) We carefully look into delivering complete dry products to reduce any allergic threat. Consult your health advisor for more details. Since the lacquer product use the natural resin “urushi”, it may change colors after a few months it was shipped from our store. At first the inlay painting lay not be visible but after using for a few months it gradually becomes more clear. The shade of the lacquerware may also differ according to the seasons, the time of the day when the lacquer was coated on the works.