JPS6446758A - Developing solution for photosensitive planographic printing plate - Google Patents

Abstract

PURPOSE:To obviate the generation of inconveniences in physical distribution or use while enriching a developing soln. to a higher concn. and enhancing the applicability of effective development additives by preserving >=2 components of the developing soln. separately or in combination into separate containers and housing the respective containers in one housing box. CONSTITUTION:An org. alkali compd., chelate compd., alkali metal salt, solvent, inorg. salt, and surfactant soln. as the developing soln. are separated to the components which dissolve stably in high concn. in each other. For example, one component is prepd. into the concd. soln. of sodium silicate or potassium silicate and caustic soda or caustic potash and another is prepd. by mixing the surfactant, aluminum corrosion inhibitor, defoaming agent, etc., into a solvent in the case of separating the developing soln. to the two components. These component containers 5, 6 are housed in one box 1 and taking out ports 3, 4 are provided to the respective containers. The generation of the inconveniences in physical distribution is thereby obviated while the enriching of the developing soln. to the higher concn. and the applicability of the effective development additives are enhanced.