The classical technique is difficult to realize if the timing of time, money, place, etc. do not overlap. This classical technique was realized ... I was able to rent a large room that could be a dark room. Work is "Monochrome print" ... This kind of work doesn't exist at present. In the 1980's advertising industry, it is necessary to make monochrome prints from positive and negative films in the layout of photographs. In other words, there was a work called “monochrome printing”.