| 摘要 |
PROBLEM TO BE SOLVED: To provide a letterpress printing device for manufacturing an organic EL element of less uneven light emission, and to provide a method of manufacturing an organic EL element, and an organic EL element.SOLUTION: A letterpress printing device includes a rotary plate cylinder 7 having a surface on which printing letterpress 8 is installed, an ink replenishing device 3 for supplying ink 5 to the printing letterpress 8, a stage 1 on which a board 2 printed by the printing letterpress 8 is mounted, and a priming unit 41 having a priming roll performing preliminary transcription by the printing letterpress 8 and a cleaning device for cleaning the priming roll. Contact angle between the surface of the priming roll and a cleaning liquid used in the cleaning device is smaller than the contact angle between the surface of the priming roll and the ink 5. |
