PLATE MAKING METHOD FOR PHOTOSENSITIVE FLAT PRINTING SHEET

摘要

PURPOSE:To eliminate the occurrence of the waste treating liquid or to minimize the amount of the waste liquid, by using the trating liquid with circulation and at the same time setting the amount of the supplied liquid of the preceding process smaller than the amount of the liquid which is carried out and supplementing the treating liquid for the shortage. CONSTITUTION:The printing sheet PS is developed by the developer which is sprayed from the treating liquid spray pipes 10A-10C. The excessive developer is squeezed by a squeezing roller 18. The sheet PS is squeezed by the front squeezing rollers 19 and 21 plus the rear squeezing rollers 20 and 22. Meanwhile a solution which stops the development is sprayed through a treating liquid spray pipe 11, and at the same time a treating liquid having the non-semitizing action is sprayed through a treating liquid spray 12. Thus the rate is larger than 1 between the residual amount caused by the rear squeezing and that caused by the front squeezing. As a result, no waste treating liquid is substantially discharged and at the sme time a stable treatment is possible for a long period of time.