부산대학교 도서관

A photosensitive laminated original printing plate for letterpress printing that does not contaminate developers, being capable of suppressing a cost increase due to developer replacement and is of high quality; and a process for producing a letterpress printing plate using the photosensitive laminated original printing plate for letterpress printing. There is provided a photosensitive laminated original printing plate for letterpress printing, comprising a support and, at least sequentially superimposed thereon, a photosensitive resin layer which is sensitive to ultraviolet radiation and is developable with water or a mixture of water and alcohol and a mask material layer which contains at least a nonultraviolet-absorbing organic dye and ultraviolet-absorbing organic dye and a binder soluble or dispersible in water or a mixture of water and alcohol and is removable by means of water or a mixture of water and alcohol, wherein the nonultraviolet-absorbing and ultraviolet-absorbing materials are of compositions having compatibility with the binder.