3. Offset printing Register differences in the register mark Register differences in a picture Close register in the register mark Register position To correct an image, where the colours are far apart, the printer uses the so-called register marks, for correcting the plate positions until the register marks appear correctly.
4. Offset printing Densitometer Bedienungspult einer Formatoffsetmaschine Colour control is achieved using a densitometer or scanner to measure the control strip. Measurement results for each colour tell the printer whether to give more or less ink in a certain area.
5. Offset printing Folding machine After printing, the sheets go to the print-finishing area. In some cases, depending on the layout of the print, the sheets need to be cut in half before they can be processed in the folding machine. In the folding machine, the sheets are normally folded to the uncut end size.
