Author's technique. Razor, illuminated specially processed black photo paper all colors are under a black layer of paper by cutting with a razor layers of illuminated specially processed photo paper and reaching the desired color a picture is created Pictures should be in normal conditions in a dry place! Protect from humidity, dampness from sunshine and keep under glass! Do not wipe! Under normal conditions, durability is provided and longer than that of photographs, since all chemistryu is cut off during operation! The paintings are covered with a special protective layer. The picture with the year and retains its appearance,durability guaranteed!