DIN 16526-1994 "Inks.letterpress plate for printing and ink performance for flat printing" This standard was published by the German Institute for Standardization (DIN) in 1994 and specifies the label marking method for ink performance for relief printing and planographic printing. The standard aims to clearly display the key performance indicators of inks, such as drying, Glossiness, adhesion, viscosity, etc. through a unified marking symbol, so that printing enterprises can quickly identify and select suitable inks in the production process. These markers provide a standardized reference for the printing industry, which helps to optimize the printing process and improve printing quality and production efficiency.