CY/T 227-2020 "flexographic printing ultraviolet (UV) curing ink usage requirements and inspection methods" This standard specifies the definition of terms, technical requirements and inspection methods for ultraviolet (UV) curing ink in flexographic printing, which is suitable for flexographic printing of plastic and paper substrates. The standard specifies key performance indicators such as curing speed, adhesion, solvent resistance of inks, and provides detailed detection methods, including curing Energy range, ink layer thickness and Glossiness testing. By standardizing the use and testing of inks, this standard aims to improve the production efficiency and printing quality of flexographic printing, while providing a unified technical basis for the industry.