FLAT-BED PRINTING METHOD

摘要

1. Planographic printing process in which, without a moistening device being employed, aqueous printing inks are transferred to the printing material by the use of lithographic printing plates of which the printing faces are moisture-absorbent and the non-printing faces are moisture-repellent, characterised in that the non-printing faces of the printing plates used are coated with silicone rubber and their information-carrying faces are metal surfaces or moisture-absorbent plastic surfaces, and in that the printing inks used correspond to the aqueous printing inks of gravure or flexographic printing and have a viscosity of 10 to 250 Pa.s, preferably 20 to 50 Pa.s, as measured at 23 degrees C.