First of all, the basis of color registration synchronization of printing machine lies in the guarantee of mechanical accuracy. The key components of printing press, such as cylinder, gear and transmission system, must be kept in good condition to ensure its smooth operation and no gap. In particular, the pressure and position relationship between the printing plate cylinder and the rubber cylinder directly affects the transfer effect of graphics and text. Regular inspection and maintenance of the
mechanical structure of the printing machine to avoid the misregister caused by wear or looseness is the premise to realize synchronous misregister.
Secondly, correct printing plate installation and calibration is also an important step to achieve consistent color registration. During the installation process, plates should be positioned in strict accordance with the registration marks, so as to ensure that the position of each color plate is accurate. Modern printing machines are usually equipped with an automatic plate alignment system, which can detect the mark points of plates through sensors and realize automatic adjustment. However, even so, the operator still needs to be familiar with the manual version adjustment method, so as to deal with the equipment abnormality in time.
In addition, the stability of paper also has an important impact on color registration. Because the paper is affected by humidity, temperature and other factors, it may expand and contract, which will lead to the position deviation of graphics and text. Therefore,
the paper with good dimensional stability should be selected as far as possible in the printing process, and the temperature and humidity in the printing workshop should be kept within the standard range (generally, the temperature is 20 ~ 25℃ and the humidity is 50 ~ 60% RH) to reduce the problem of color registration caused by paper deformation.
The experience and sense of responsibility of operators can not be ignored. Even if the equipment is advanced, the operator needs to have good judgment and debugging ability. For example, in the printing process, we should pay close attention to the changes of the first proof and the continuous proof, find out the color registration deviation in time and adjust it. At the same time, reasonably arrange the printing color sequence to avoid overprinter errors caused by inconsistent ink drying time.
To sum up, the color registration synchronization of printing machine is a systematic project, involving
mechanical accuracy, printing plate installation, paper control and operation technology. Only on the premise of good equipment, standardized technology, stable materials and skilled personnel can we realize high-quality multi-color printing and ensure accurate colors and clear pictures and texts of printed products. With the continuous development of printing technology and the introduction of automation and intelligent means, the accuracy and efficiency of color registration synchronization will
be further improved, and higher production benefits and quality assurance will be brought to the printing industry.