Evaluation of color changes during stability studies using spectrophotometric chromaticity measurements versus visual examination.

b* differences were however slightly significant for the visual examination from day 28 onward (p = 0.002), but a change in L* vales was only detected as significant after 39 days (p = 0.015). ΔE values varied from 0.027 to 0.163 for the samples stored in the dark (days 7 to 46) and from 0.035 to 3.558 (days 7 to 46) when exposed to light.

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