Colors were expressed as L*, a* and b* values, which indicates color lightness, redness, and yellowness of the sample, respectively (Chen, Zhu, Zhang, Niu, & Du, 2010).
Colors were expressed as L*, a* and b* values, which indicates color lightness, redness, and yellowness of the sample, respectively (Chen, Zhu, Zhang, Niu, & Du, 2010).
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