MANUFACTURING METHOD OF FLEXOGRAPHIC PRINTING PLATE

    公开(公告)号:US20230393480A1

    公开(公告)日:2023-12-07

    申请号:US18452721

    申请日:2023-08-21

    发明人: Kenji KANO

    IPC分类号: G03F7/12 B41C1/10

    摘要: Provided is a manufacturing method of a flexographic printing plate, which achieves both a depth of a concave portion and reproducibility of independent dots by eliminating an insufficient depth of the concave portion and increasing a cured region around the independent dots. The manufacturing method of a flexographic printing plate includes an exposure step of irradiating, with an energy ray, a flexographic printing plate precursor which includes, in the following order, at least a support, a photosensitive layer, and a mask portion on which an image is formed, through the mask portion to expose the photosensitive layer, and a development step of removing a non-exposed portion of the photosensitive layer. The exposure step includes a step of radiating the energy ray in a state in which, from the photosensitive layer side, the mask portion and a film-like optical element are present in this order between an energy source and the photosensitive layer. The film-like optical element is an element which converges the incident energy ray to enhance directivity and emits the energy ray to the mask portion.