The ASTM D7298-06 (2017) standard provides a method of measuring the relative clarity of printings using polarizing filters. This test method is designed to evaluate the effect of layout, font, font size, Color, and background on label legibility. Studies have shown that the age of the subject has a significant impact on test results, so subjects aged 19 to 28 are recommended to maintain data Stability. This method helps testers evaluate the relative clarity of printings by comparing the readability of different labels under different conditions, but is not used to quantify the difference in readability from the standard.