The GB/T 16995-1997 standard specifies a method for measuring the gel time of thermosetting powder coatings at a given temperature (usually 180 ° C). Gel time refers to the time it takes for powder coatings to melt and become non-deformable, which is an important indicator of powder coatings properties and quality control. This method is not suitable for powder coatings with ultra-short gel time (less than 15 seconds). The standard describes the test principle, required materials, instrumentation and specific test procedures in detail, which is of guiding significance for quality control and Product Research & Development in the powder coatings industry.