GB/T 1743-1979 "Determination of Gloss of Paint Film" provides a standard method for the measurement of Gloss of paint film. This standard uses a fixed-angle photoelectric Glossometer to calculate the Gloss value by comparing the amount of light reflected from the surface of the paint film and the surface of the standard plate. The result is expressed as a percentage. This method is suitable for various types of paint film, ensures the accuracy and repeatability of Gloss measurement, helps to evaluate the visual mass and Glossiness of the coating surface, and is instructive for coating mass control and comparison.