Performance indicators of paint products -- What is the solid content of paint products?

Testing methods for solid content: Traditional testing methods – ASTM Analysis Standard D2369: Determining the content of volatile components in coatings by oven drying. This standard was put into effect in 1965 and enables accurate measurement of volatile compound levels; however, this method typically requires several hours of testing time, which has an adverse effect on production efficiency. Furthermore, this method cannot provide real-time analysis results, which leads to delays in the detection and resolution of abnormal issues during the production process. Rapid drying loss method: Due to the continuous advancements in drying loss technology, the American Society for Testing and Materials established a new testing standard in 2006, ASTM D7232 – Standard Test Method for Rapid Determination of the Content of Non-volatile Components in Coatings Using the Drying Loss Method. This testing method can yield test results identical to those of ASTM D2369, but the testing time is reduced from over 2 hours to just a few minutes, allowing it to fully replace the ASTM D2369 standard.