GB/T 41197-2021 focuses on the field of printing technology and standardizes the communication rules of printing paper characteristics. It defines the terminology of paper characteristics, covering quantification, whiteness, smoothness, etc. It stipulates the representation method and accuracy requirements of paper characteristic data, as well as the key description content of different paper characteristics in the communication. Through unified communication rules, printing practitioners, paper suppliers and other parties can accurately transmit and understand paper information, help to accurately select paper according to printing needs, improve printing quality, and reduce production problems caused by poor communication of paper characteristics.