GOST 24768-2000 Determination of fine porcelain whiteness is a Russian national standard that specifies the determination method of fine porcelain whiteness. The standard determines whiteness by measuring the Light spectrum reflection coefficient of the sample, which is suitable for all types of fine porcelain products. Its core content includes Measurement principles, instrument requirements, sample preparation and result expression. Whiteness is expressed as a percentage, reflecting the relative luminance of the sample and the standard whiteboard. The standard provides a scientific basis for quality control and Product Research & Development in the ceramic industry.