Method and device for ink monitoring in a printing machine

Abstract

Abstract During sheet printing, a three-colour offset printing machine produces colour measurement bars with a plurality colour measurement fields. A grey screen field (52) produced by the superimposition of three colours serves as the reference field, the colour location of which is compared in a colour separation computer (68) with the colour location of an associated nominal reference field (51). From the colour separation, a layer thickness modification computer (71) calculates a layer thickness modification control vector with the aid of a sensitivity matrix (74) calculated by a matrix computer (73) on the basis of a linear model. In addition, the matrix computer (73) evaluates a series of adjacent fields which comprise three single- colour screen fields, three single-colour full tone fields, three two- colour full tone fields and one three-colour full tone field. …<IMAGE>…

Inventors

• 👤 Guido Keller
• 👤 Helmut Prof. Dr. Kipphan

Bibliographic Details