The ASTM D 2244-23 standard describes a method for calculating the color difference by measuring the color coordinates of an instrument. Test results can be expressed on the L, a, b, or x, y, z scales, and are often used in conjunction with UV accelerated aging testing. The standard emphasizes measurement in the same color scale system to ensure accurate comparison of Color differences between samples. Color differences are usually expressed as "Delta E". When Delta E is greater than or equal to 2.3, the human eye can perceive the color difference. The standard also states that the test sample needs to be kept clean, dried, and provide a flat and uniform measurement area.
This summary is not the original standard text and is for reference only. For accurate information, please obtain it through official channels.
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