Interpretation of the standard"Test Methods for Building Sealants—Part 21:Determination of Color Change after Laboratory Accelerated Weathering Procedures"
Interpretation of the standard"Test Methods for Building Sealants—Part 21:Determination of Color Change after Laboratory Accelerated Weathering Procedures"
This article introduces the preparing background and main content of the national standard GB/T 13477.21-2022"Test methods for building sealants—Part 21:determination of color change after laboratory accelerated weathering procedures".In this standard,a UV aging chamber with an automatic spray device is used as an artificial accelerated aging device.By measuring the color difference value of the sealant specimen before and after the artificial accelerated automatic cycling exposure,the stability of the sealant color is evaluated,and the color change level is divided.
关键词
建筑密封材料/试验方法/人工加速老化/颜色变化/变色等级
Key words
building sealing materials/test method/artificial accelerated aging/color change/color change level
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