GCM 110 Chapter Notes - Chapter 5: Viscosity, Bookbinding, Offset Printing
25 Apr 2016
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Plate, impact, or pressure printing: offset litho, letterpress, flexo, gravure, screen; prints at higher resolution and print quality than plate-less process; for long-run. Plateless, non-impact, or pressureless printing: digital printing systems; electrophotographic printers, ion or electron deposition, magnetographic ink-jet, thermal transfer, and dye sublimation; for short-run, variable information, or demand printing 1) plate printing processes and 2) digital printing processes. Offset lithography: reproduces soft, smooth transitions of color and tones, hq photographic images, and sometimes differences in color balances throughout a run. Letterpress/ flexography: reproduces sharp edges with crisp line art printing, lq photographic images, slight embossing of type on the back of printed sheets. Gravure: reproduces strong, saturated colors, slightly ragged type. Can be printed direct, but majority of lithographic printing uses the offset principle. = increased plate life 3) the plate image is right reading rather than reversed reading; 4) less ink is required for equal coverage= drying is faster, smudging/set-off reduced.
