Surface of guiding printed substrate with micro-protuberance

Abstract

A printing-material-carrying surface, having micro-elevations which make contact with a printing material provided with printing ink, and having a guide printing is at least partly provided, preferably substantially only at peaks of the micro-elevations, with a fluid additive to improve print quality, in particular in recto and verso printing. The fluid additive, in particular a liquid additive diluting the printing ink and / or delaying and / or slowing the drying of the printing ink, is at least partly transferred to the printing material by the surface.

Description

technical field [0001] The invention relates to a surface for guiding a printing substrate with microprotrusions. [0002] Furthermore, the present invention also relates to the use of microprotrusions for guiding the surface of a printing substrate. [0003] Furthermore, the present invention also relates to a printing method. Background technique [0004] In duplex printing, ie the substrate is printed on both sides in one pass through the printing press, after the substrate has been turned over, the substrate is placed against the reverse printing unit with the side that has already been printed and may not have dried sufficiently on the corresponding surface of the impression cylinder. While passing through the printing gaps of the reverse printing units, the printing material is pressed against the corresponding surface of the impression cylinder under a pressing force. In order to avoid contamination of the surface of the impression cylinder with ink, contamination ...

AI Technical Summary

Problems solved by technology

[0012] Because the solutions of the prior art do not always guarantee a satisfactory print quality, and because it is necessary to especially avoid the generation of so-called "white spots" (cf. image 3 and related instructions), so there has always been a desire to improve the surface of the leading substrate

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