The ISO 2846-1 standard specifies Color and transparency requirements for inks groups for four-color printing, applicable to sheet and thermoset web offset plate printing. The standard provides clear technical specifications for ensuring ink color conformity and transparency during four-color printing, with the aim of improving printing quality and color reproducibility. By defining color and transparency parameters for different types of Printing inks, printing plants and manufacturers can produce high-quality prints that meet industry standards. This standard not only applies to sheet offset plate printing, but also covers the printing application of thermosetting web paper, which is widely used in commercial printing and Encasement printing.