This research aimed to provide a scientific methodology for removing white and black/brown colouredstains on the wall paintings of tombs of Jinpari No 1 and No 4. in the Democratic People’s Republic of Korea. Forthe analysis of chemical composition of stains of the samples from the wall paintings, a microscope and SEM/EDXwere used. The analysis confirmed that the fomula of white coloured stains should be CaSO4 or CaCO3 and theblack/brown coloured stains should be CaSO4 or CaCO3 with soil deposition. Because of the difficulties of testingseveral cleaning solutions on sample patches of large area of the painting, the author considered a risk-free cleaningsolution as being the most appropriate one, with Ammonium bicarbonate and Anion exchange resin showing satis-that physical cleaning should be followed by applying a cleaning solution.