| 摘要 |
<p>A method of recycling waste liquid from a plate-making process, including: performing, in an automatic developing machine, a plate-making process using a development replenisher liquid, the plate-making process including developing a planographic printing plate precursor after exposure to light, the development replenisher liquid including at least one selected from the group consisting of anionic surfactants having a naphthalene skeleton and nonionic surfactants having a naphthalene skeleton at a total content of from 1% by mass to 10% by mass, the total content of organic solvent having a boiling point within a range of from 100°C to 300°C being no more than 2% by mass, and the development replenisher liquid having a pH of from 10 to 13; concentrating, by evaporating, the discharged plate-making process waste liquid, such that the ratio of the volume of the plate-making process waste liquid after concentration to the volume of the plate-making process waste liquid before concentration is within a range of from 1/10 to 1/2, thereby separating water vapor; and using the obtained regenerated water as diluent water for preparation of the development replenisher liquid for the automatic development machine or rinse water.</p> |
