DEVELOPER, PROCESS FOR TREATING DEVELOPING SOLUTION, PROCESS FOR PRODUCING PRINTING PLATE, AND FILTER APPARATUS

摘要

The present invention provides a developer that can efficiently remove photosensitive resin components dispersing in a developing solution. The present invention provides a developer comprising: a feeder 31 that feeds a developing solution 5 to a printing raw plate 1; a dispersing-object-filter 13, wherein the developing solution 5 in which a photosensitive resin composition separated from a photosensitive resin composition layer of the printing raw plate 1 is dispersed, is passed through the dispersing-object-filter 13 to flocculate the photosensitive resin composition dispersing in the developing solution 5; and a flocculating-object-filter 15 that removes the flocculated photosensitive resin composition from the developing solution 5 passed through the dispersing-object-filter 13.