| 摘要 |
PROBLEM TO BE SOLVED: To provide a method for controlling development in an automatic developing device for a photosensitive lithographic printing plate that can minimize variation in liquid developer sensitivity with change of development processing conditions while making the constitution of a development section of the automatic developing device simple and low-cost. SOLUTION: The electric conductivity of the liquid developer is measured in each predetermined fixed period, a development replenisher is replenished every fixed time as a time lapse replenisher in an amount based upon a set value of a time lapse replenishment rate, the development replenisher is replenished every processing of a fixed area of a photosensitive lithographic printing plate as a processing replenisher in an amount based upon a set value of a processing replenishment rate, a calculated value of electric conductivity is calculated from the amounts of the time lapse replenisher and the processing replenisher, the set values of the time lapse replenishment rate and the processing replenishment rate are increased or decreased according to the result of the comparison of the calculated value with the measured value, and the value of the difference between the conductivity calculated value and liquid developer conductivity is displayed as a degree of a liquid developer activity. COPYRIGHT: (C)2007,JPO&INPIT |
