This standard specifies the basic requirements and methods for the determination of true density of ceramic materials and pigments. True density is the ratio of the mass of the specimen to its true volume. The scope of application includes ceramic raw materials, billets and pigments. A variety of equipment and appliances are required during the test, such as Analytical Balance, thermostatic box, weighingbottle, drying device, Specific Gravity bottle, vacuum device, boiling device, true density analyzer, test sieve, etc. Sample preparation includes steps such as sampling, screening, drying to constant weight, etc., to ensure that the prepared mass of the specimen meets the requirements.