GB/T 5211.17-1988 "Comparison of Contrast Ratio (Hiding Power) of White Pigments" specifies the method for comparing the contrast ratio (hiding power) of white pigments, applicable to various types of white pigments. The method involves preparing a dispersion of the pigment with a vehicle, applying it to form a film of specified thickness, measuring its reflectance on black-and-white substrates, and calculating the contrast ratio. The test requires the use of a reflectometer, film applicator, black-and-white standard substrates, and an analytical balance, providing a unified basis for evaluating the hiding performance of white pigments.
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 | G53 | ICS | 87.060.10 |
| Release Date | 1988-09-05 00:00:00 | Implementation Date | 1989-04-01 00:00:00 |
