New Developments and Trends in Lithography.

Despite the research that has been done, lithography still has some limitations that can restrict its future growth. These are (1) the variability of the ink-water balance, (2) the need for special characteristics in paper, (3) the use of tacky inks, (4) the possibility of slur in the impression when printing on smooth surfaces, and (5) the overall content of the blanket with the paper in the impression nip. In addition it suffers from the use of poor pigments, the fact that papers are not white, and the graying of halftone tints. Developments in photography, platemaking, press, and paper and ink are helping to eliminate these limitations. Discussed are the use of balanced inks, better plates, the Dahlgren and other dampening systems, a new disposable blanket, ink transfer and tinting studies, and work on the development of a Print Quality Instrument that may eventually lead to automation of quality on the press.