| 摘要 |
PURPOSE:To eliminate a need for the operation management of developing solution, which lowers the operation rate of the device, maintain the developing capacity of developing solution, and obtain a stable resolution in the automatic developing machine for a board manufacturing film for manufacturing a printed board. CONSTITUTION:The machine is equipped with a control strip running line 1b which allows a control strip 9 for controlling developing solution to be moved in parallel with a developing line 1a developing a exposed film 8, a light irradiating section 13 measuring the photographic density of a pattern for the developing solution concentration management control strip 9 having a plurality of patterns which are exposed in advance while the exposure degree is lowered in accordance with the feeding direction at the rear stage of the control strip running line 1b, and with a measuring and computing section 7 including a transmitted light detecting section 14, the photographic density of each pattern is examined while the exposed film 8 is being moved so as to allow the concentration of developing solution to be instantly judged, so that developing solution is resultantly replenished. |
