Presetting and Controlling by the Heidelberg CPC-System

New technologies for presetting and setting ink keys in printing machines are described. Instrumental inspections of developed plates or printed sheets require optoelectonic and microprocessor means. Developing stages and present equipment are discussed. Calibration facilities due to so many plate surfaces common in graphic arts are briefly described. Calculations of zonal image area into duct sweep and ink valve openings and their parameters are mentioned. Examples of computer recommendations are given and the importance of the printer's decision is pointed out.