High Sensitive Photopolymerization Initiator System using Violet Laser and Its Application to Photopolymer CTP Plate

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  • Shibuya Akinori
    Synthetic Organic Chemistry Laboratories, R&D Management Headquarters, FUJIFILM Corporation
  • Kunita Kazuto
    Synthetic Organic Chemistry Laboratories, R&D Management Headquarters, FUJIFILM Corporation
  • Koizumi Shigeo
    Synthetic Organic Chemistry Laboratories, R&D Management Headquarters, FUJIFILM Corporation

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A highly sensitive photopolymerization system by using violet laser, 405nm, was investigated. The photopolymerization composition which contained an initiator and a high fluorescent dye showed efficient sensitization of the system. The photosensitization mechanism seemed to have a singlet energy transfer process. A key molecular design of the dye getting the higher photosensitization efficiency is a repression of thermal relaxation from the excitation state. The photopolymerization system was applied to the computer to plate (CTP) technology, a digital printing plate, to develop our i-Presso P-NV for the violet laser. As compared with a system using a conventional FD-YAG laser, the P-NV system revealed the advantage of high productivity on plate making and also handling under a brighter safelight.

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