| 摘要 |
PURPOSE:To obtain a dye concn. sufficient for visible images by constituting the dyeing liquid for waterless planographic printing plates of the liquid which contains surfactants and does not substantially contain org. solvents. CONSTITUTION:This dyeing liquid contains water, dyes, and the nonionic surfactant, further contains at least one kind among the anionic surfactant, cationic surfactant and amphoteric surfactant and does not substantially contain the org. solvents. The amt. of the noionic surfactant to be added is 0.1 to 10wt.%, more preferably 0.2 to 5wt.% of the weight of the dyeing liquid and the HLB value is specified to a 13.0 to 19.0 range. The staining of the silicone layer of non-image parts, the rear surface of a base and the rubber roller, etc., of a developing machine is suppressed in this way. The effect of the nonionic surfactant is high when used in combination with the anionic surfactant. |
