This standard specifies a method for quantifying the degree of yellowness and its variation in transparent or opaque plastic materials, including various forms such as sheets, films, and powders. It calculates the yellowness index by measuring the spectral data of the sample under standard conditions and applying a prescribed formula. One of the core applications of this method is to evaluate the impact of environmental factors, such as high temperature and ultraviolet radiation, on the color stability of plastics. The primary testing instruments specified in the standard are colorimeters or spectrophotometers, which are used to obtain the spectral reflectance or transmittance data required for the calculations.
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 | G31 | ICS | 83.080.01 |
| Release Date | 2021-03-09 00:00:00 | Implementation Date | 2021-10-01 00:00:00 |
