Definition: (1) Photomechanical printing process using two inks to increase tonal range: two half-tone screens are made at different angles. Darker colour ink is used to print solid and near-solid areas, lighter colour ink is used to print mid and lighter tones. * Used in high-quality print reproduction of photographs for books, posters etc. (2) Mode of working in image manipulation software that permits printing of image with two inks, each with its own reproduction curves.

Related Terms: tritone, quadtone

Previous Term: drum scanner  Next Term: duplex

Type a photography term below to find its definition: