FZ/T 51016-2019 "Waterborne colorants for chromadizing of viscose fibre stock solution" standard details the terms and definitions, product identification, technical requirements, test methods, inspection rules, marking, Encasement, storage and transportation requirements of water-based colorants suitable for chromadizing of viscose fibre stock solution. The standard ensures the Stability and Reliability of colorants during the chromadizing process of viscose fibre, covering various specifications from product preparation to use. Quoting a number of national standards, such as Paints, varnish and plastic non-volatile-matter content determination, pigment Color comparison test method, etc., to ensure that colorants products meet the requirements of safety and environmental protection.