| 摘要 |
PURPOSE:To obtain the resistance to pressing and rubbing and to shorten the time for vacuum contact by incorporating an org. solvent which can dissolve or swell a photosensitive layer into an aq. liquid which is sprayed in such a manner that the content thereof attains <5wt.%. CONSTITUTION:The aq. liquid to be sprayed onto the surface of a photosensitive printing plate contains the org. solvent which can dissolve or swell the photosensitive layer; in addition, said liquid is so formed that the content of said solvent attains <5wt.%. An acrylic resin, a copolymer contg. at least one kind of monomer units having a sulfonic acid group, etc., are used as the resin to be dissolved or dispersed into the above-mentioned aq. soln. Additives such as light absorbents, dyes and pigments for various purposes may be added into the coating liquid. The photosensitive printing plate which has the resistance to pressing and rubbing and is short in vacuum contact time is obtd. in this way. |
