The KS L1209-1989 standard specifies a method for the determination of 45-degree gloss in Pottery and porcelain tableware. It is suitable for glazed Pottery and porcelain samples and materials with similar reflection characteristics. The gloss is assessed by measuring the reflected light intensity of the sample under specific geometric conditions. This method is not only used to compare the Gloss of Pottery and porcelain products, but also helps to study their corrosion resistance, abrasion resistance and other characteristics, which is of great significance for Pottery and porcelain product quality control and evaluation.