Abstract: A solvent recovery method and apparatus recover waste wash liquid generated in automatic washing of a printing machine so as to enable a printing machine washing of high productivity, excellent safety and health effect, and low cost. The solvent recovery apparatus has a gravity separation tank (1) for receiving waste wash liquid used for washing of the printing machine and separating it by a specific gravity difference. A vaporizer (2) receives, heats and vaporizes the separated liquid from the tank (1) in order from a lower layer liquid (H) to an upper layer liquid (L). A condenser (3) receives, cools and condenses, by water (W), the vapor from the vaporizer (2). A distillate gravity separation tank (4) receives liquid from the distillate gravity separation tank (4) receives liquid from the condenser (3) and holds it statically to separate the liquid into organic solvent (S) and water (W).

Abstract: A wetting apparatus for offset printing machines comprising a first wetting roller immersed in a pan having dampening solution, a metering roller contacting with the first wetting roller, a second wetting roller contacting with the metering roller and with a printing surface, an ink application roller contacting with the printing surface, an ink receiving roller rotatably in contact with the second wetting roller and movable toward and away from at least one of the metering roller and the ink application roller, a vibrating roller rotatably in contact with the ink application roller, and an ink transferring roller rotatably in contact with the vibrating roller and movable toward and away from the ink receiving roller.