GB/T 13477.21-2022 specifies the method for determining the color change of building sealants after accelerated aging in the laboratory under simulated climatic factors such as light and heat. The method uses a colorimeter to measure color coordinates before and after aging, quantifying the degree of discoloration of the material by calculating the color difference value (ΔE).
This summary is not the original standard text and is for reference only. For accurate information, please obtain it through official channels.
| Status | Active | ||
|---|---|---|---|
| CCS | Q24 | ICS | 91.100.50 |
| Release Date | 2022-07-11 00:00:00 | Implementation Date | 2023-02-01 00:00:00 |
