| 摘要 |
The present invention provides a method for producing a cylindrical relief printing original plate by mounting a printing original plate sheet around a cylindrical support, which method can produce a cylindrical relief printing original plate having high joint strength in terminals thereof whereby the printing original plate is not demounted even when a laser engraving is applied thereto. The method of the present invention comprises (i) a step for preparing a printing original plate sheet having an uncured photosensitive resin layer on a surface thereof, wherein compressive strength of the uncured photosensitive resin layer at 25°C is 1.0 to 3.0 kgf/cm 2 ; (ii) a step for mounting the printing original plate sheet around a cylindrical support in such a manner that a starting terminal of the mounting and an ending terminal of the mounting are overlapped; and (iii) a step for applying pressure to the overlapped area of the starting terminal of the mounting and the ending terminal of the mounting at a temperature range of 10 to 40°C so as to pressure-bond the overlapped area. The method of the present invention may further comprise, after the step (iii), a step (iv) for photo-curing the uncured photosensitive resin layer and may further comprise, after the step (iv), a step (v) for grinding, abrading and/or machining the overlapped area. |
