This standard specifies the method for determining the mixing degree of paint base for Paints and varnish, aiming to evaluate the uniformity and dispersion of paint base components. Through specific test procedures, the standard provides a technical means to evaluate whether the components in the paint base are sufficiently mixed to ensure that the paint has a consistent performance during use. The standard details the preparation of samples, the determination steps of mixing degree and the evaluation criteria, which is suitable for paint manufacturers, quality control laboratories and R & D institutions. This method can effectively monitor the mixing mass of paint raw materials and ensure the Stability and performance conformity of the final product. The standard helps to improve the production process mass of paint products and ensure that the use effect of coatings meets the requirements.