GB/T 1735-2009 "Determination of Paints and varnish heat resistance" stipulates the determination method of Paints and varnish heat resistance. The standard specifies the preparation requirements of the sample, standardizes the heat resistance test process of different types of Paints varnish under specific temperature and time conditions, and the evaluation criteria for the change of coating Appearance and performance after the test. Through scientifically setting the detection steps and judgment basis, it provides a unified technical standard for accurately measuring the heat resistance of Paints and varnish and ensuring the mass of products.