| 摘要 |
Water and oil base ink are delivered to lithographic plates as a single liquid, a mixture of water and ink, wherein the water is in the form of fine droplets dispersed in the ink. Preferably also, lithographic concentrate is added to the mixture as part of the water content. During a printing run the mixture is automatically resupplied to the printing machine by a level sensor that controls the amount of ink and water and by a pH sensor that controls the concentrate percentage. The proportion of ink and water is controlled by a moisture sensor. The thickness of the film of mixture delivered to the lithographic plate is controlled by a density sensor. A viscosity sensor controls the agitation of the mixture. As few as three rollers are required to deliver the ink-water-concentrate dispersion from a fountain to a lithographic plate.
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