An overprint is an additional layer of text or graphics[graphics?:graphics pattern] added to the face of a postage stamp or banknote after it has been printed. Post offices most often use overprints for internal administrative purposes such as accounting but they are also employed in public mail. The most well-recognized varieties are commemorative overprints which are produced for their public appeal and command significant interest in the field of philately.
Effective use of manual signs to ensure overlay accuracy, the machine can be adjusted after the overlay, first adjust the knob to manually register layout, and then adjust the computer. Overlay error to rely on the tension adjustment of the vertical and horizontal error horizontal position control system relying on paper[paper?:paper sample maker cutting machine] tape and push-pull version of the roller adjustment. While observing the line of manual and computer overprint logo mark sign on the version of the standard color is accurate. If the above steps fail to consider the purpose of the overlay sign making and graphic placement failure or wrong.
