gravure printing

gravure printing

Printing processes used for catalogs, magazines, newspaper supplements, cartons, floor and wall coverings, textiles, and plastics. The Bohemian Karel Klíc made photogravure a practical commercial process in 1878. An image is etched in the copper surface of the printing cylinder as pits or wells of different depths. In rotogravure printing, the cylinder rotates through a trough filled with fast-drying ink. A thin steel doctor blade removes the ink from the surface but not from the wells. The cylinder comes in contact with the paper, which draws the ink out of the wells. Because of the various depths of the wells, a full range of tonal values can be printed; in reproducing illustrations, gravure comes closest to simulating continuous-tone copy. In colour printing, a separate cylinder is prepared for each colour. See also letterpress printing; offset printing.

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gravure printing [grə′vyu̇r ‚print·iŋ]

(graphic arts)

A process that prints from sunken or depressed surfaces or cups on a plate, in contrast to the raised printing surfaces of letterpress; the depth (and the area) of the depressed areas varies, thus yielding more or less ink on the paper.