The QB/T 1668-2012 "Cobb Absorption Tester" standard specifies the classification, technical requirements, test methods, inspection rules, marking, Encasement, transportation and storage requirements of the product. This standard is applicable to the production acceptance, mass assessment and periodic calibrating of Cobb Absorption Tester in use. The standard describes the design and manufacturing requirements of the tester in detail to ensure its accuracy and Reliability during use. At the same time, the standard lists relevant normative reference documents, including GB/T 191, GB/T 13306, GB/T 13384 and GB/T 14253, to ensure that the Encasement, labeling and general technology of mechanical products of the tester meet the requirements of national standards.