The ASTM 313-2020 standard specifies a method for calculating yellowness and whiteness indices using instrument measurement Color coordinates. The method is suitable for samples with a dominant wavelength of 570-580nm (for yellowness measurement) and for samples with a Munsell value greater than 8.3 (for whiteness measurement). The standard illustrates the correlation of these indices with visual estimation and recommends comparison with visual evaluation results in practical applications. The standard also states that the way samples are prepared may affect the accuracy of measurement results.
This summary is not the original standard text and is for reference only. For accurate information, please obtain it through official channels.
| Status | |||
|---|---|---|---|
| CCS | ICS | ||
| Release Date | Implementation Date | ||
