Method and device for printing grey scale images at high printing speed and image quality

摘要

The present invention relates to ink jet printing, and more particularly to a method of printing and an apparatus for providing images having grey levels of varying intensity. ;The present invention provides a method and device for printing grey scale images on a printing medium. The method includes delivering at least a number of first droplets of printing material of a colour with a first volume from a first printhead and a number of second droplets of printing material of that colour with a second volume from a second printhead, the first volume and the second volume being different, and merging together the number of first droplets and the number of second droplets on a target pixel position on the printing medium to obtain a given greyscale dot on the printing medium.