ISO 2812-1-2017 "Determination of resistance to liquids of Paints and varnishes, Part 1: Immersion in liquids other than water" specifies a general method for assessing the resistance of single or multi-layer coatings to liquids or pasty products other than water. These methods allow testers to determine the effect of different test liquids on coatings and, if necessary, assess the extent of damage to substrates. This standard applies to quality control and performance evaluation of coating systems and helps to ensure the durability and Stability of coatings under various environmental conditions. The ISO 2812-1-2017, prepared by SC 9 group under ISO/TC 35 technical committee, cancels and replaces the 2007 second edition, adding CAS numbers and terms and definitions clauses to improve the accuracy and applicability of the standard.