QB/T 2789-2006 《General methods on determination of cosmetics -Determination of colour tristimulus values and colour difference△E》 Related products

This standard specifies the determination method of tristimulus values and color difference Delta E of cosmetic color, which is suitable for cosmetics without pearlescent agents. The method includes the measurement of reflection color and transmission color, and directly compares the lightness (L '), chroma (a, b') of the sample with the standard sample to calculate the color difference Delta E value. The instruments used include a fully automatic color difference meter and a constant pressure powder sample press. The sample preparation method involves cream, honey, nail polish, etc. The measurement steps include sample preparation, instrument calibrating and color difference calculation. The results are based on the average of two measurements.