GB/T 33299-2016 "Colorant Dispensing Machine for Coatings" applies to colorant dispensing machines for coatings that use water-based colorants for color mixing. It specifies the definitions of terms, classification, technical requirements, test methods, and other contents. The colorant dispensing accuracy is tested using an electronic balance, the color uniformity of the mixed coating is measured with a colorimeter, the operating noise of the equipment is measured with a noise meter, and the electrical safety performance is tested with an insulation resistance meter and a grounding resistance meter. The standard also clarifies the rules for type testing and factory inspection to ensure the performance and safety of the colorant dispensing machine.