CONTROLLER FOR DAMPENING WATER SUPPLY AMOUNT, OFFSET PRINTER HAVING THE CONTROLLER, AND METHOD FOR CONTROLLING DAMPENING WATER SUPPLY AMOUNT

摘要

PROBLEM TO BE SOLVED: To provide a controller for a dampening water supply amount and a method for controlling the amount to contribute to a reduction in a production cost of printing and particularly adapted to an automatic control by decreasing a spoilage for causing a decrease in a water content while maintaining good color tone quality on a printed product and a printer having them. SOLUTION: The controller for a dampening water supply amount and a method for controlling the amount regulate a rotating amount of a water fountain roller so that a lowest water content falls within a predetermined range between an upper limit and a lower limit from distribution data of the content of a mixture layer of an ink and a dampening water on a metal roller of inking rollers. The offset printer has the controller and the method.