The ASTM D1640/D1640M-14 (2022) Standard Test Method for organic coatings drying, curing, or film formation provides a standardized set of test methods for evaluating the drying, curing, or film formation process of organic coatings under different conditions. The standard includes a variety of test techniques for determining Coating drying time, curing speed, and film formation mass for different types of organic coatings (e.g. paints, varnish, etc.). The test covers the hardening, drying and film formation of the coating in the specified environment to help evaluate whether the coating can achieve the expected physical performance during actual use. This standard is important for Coating manufacturers, Quality control personnel and engineers in related industries to ensure the conformity and Reliability of Coating performance, especially in the process of Coating application. Accurate control of drying and film formation speed.