| 摘要 |
A developer replenishing method of an automatic development device of photosensitive lithographic printing plate including developing a plurality of exposed photosensitive lithographic printing plates with a developer containing an electrolyte and keeping the developer activity constant, which includes measuring an electric conductivity of the developer in every predetermined fixed period; providing a predetermined setting value of replenishing amount due to aging in every fixed time; providing a predetermined setting value of replenishing amount due to processing in every processing of a plate having a fixed area; calculating a replenishing amount due to aging based on the replenishing amount setting value due to aging; calculating a replenishing amount due to processing based on the replenishing amount setting value due to processing; calculating an operating value of electric conductivity from the replenishing amount due to aging and the replenishing amount due to processing; and increasing or decreasing the setting value of replenishing amount due to aging and the setting value of replenishing amount due to processing based on a result obtained by comparing the calculated operating value of electric conductivity with the electric conductivity of the developer. |
