| 摘要 |
A developing method for a photosensitive resin printing plate which can reduce the cost for treating waste liquid by using an aqueous developing liquid not containing surfactant and recycling and reusing the developing liquid. A photosensitive resin printing plate which is hardened in a prescribed pattern by exposure is developed by spraying an aqueous developing liquid comprising either water only or two phases of gas and liquid to a surface of printing plate under a high pressure (water pressure 1 to 30 MPa, gas pressure not lower than 0.1 MPa), a hygroscopic photosensitive resin mixed in a worn-out developing liquid is separated and removed by means of filter or the like, and filtrate is recycled and reused as a developing liquid. |
