What is the color standard for printed copies in China? What are the standard values?

Printing is divided into special edition printing and imposition printing. The color difference of special edition printing is 5%- 10%. The color difference of imposition printing is 10%-20%.

Printing: Printing (graphic art, graphic communication) is a technology that transfers ink to the surface of paper, fabric, leather and other materials through the processes of plate making, ink application and pressure, and copies the original contents in batches. In a simple sense, printing is a process of transferring graphic information from the manuscript to the substrate by printing plate or other means, and it can also be understood as a replication process of transferring colorants/pigments (such as ink) to the substrate by using analog or digital image carriers.