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    • 1. 发明专利
    • DAMPENING WATER FOR OFFSET PRINTING
    • JPH04158094A
    • 1992-06-01
    • JP28495590
    • 1990-10-22
    • SOUSEI KKMETETSUKUSU SANWA KK
    • MIYAWAKI JUNICHISUZUKI KEIICHI
    • B41N3/08
    • PURPOSE:To reduce the consumption of an additive, improve the workability and to save the energy by passing well water, city water, etc., through two kinds or more of ceramic aggregates having different dielectric constants and using water mainly comprising water treated under the fluidized state of the ceramic aggregates as dampening water for off-set printing. CONSTITUTION:Two kinds or more of ceramic aggregates having different dielectric constants are composed of the single bodies of the fine particles of ceramics having the low dielectric constant and ceramics having the high dielectric constant or a mixture thereof, and granulated and backed, and granular ceramics having diameters of approximately 1-5mm are favorable, and a mixing ratio extends from 3/7 to 7/3. A water activating purifier houses granular ceramics under a fluidizable state, is formed so as to be able to pass water, and has excess volume and shape proper to the most effective fluidizing and collision of the granular articles. Accordingly, the surface tension of water is lowered to approximately sixty % or eighty % of that of distilled water, the dampening of dampening water can be improved extremely, and a surface-active agent need not be added or may be hardly added.