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. 2019 Mar 19;20(6):1378. doi: 10.3390/ijms20061378

Table 1.

Color coordinates by CIElab color space (L*a*b*) and density of the bio-based polyethylene terephthalate (bio-PET)/recycled cotton fiber (RCF) composite pieces.

Code L* a* b* Tone Density (g·cm−3)
Bio-PET100 75.4 ± 1.0 −2.3 ± 0.3 −2.9 ± 0.4 graphic file with name ijms-20-01378-i001.jpg 1.253 ± 0.003
Bio-PET99/RCF01 46.8 ± 1.5 −1.2 ± 0.3 4.7 ± 1.8 graphic file with name ijms-20-01378-i002.jpg 1.280 ± 0.002
Bio-PET98/RCF02 35.2 ± 1.0 −0.9 ± 0.1 5.2 ± 1.0 graphic file with name ijms-20-01378-i003.jpg 1.285 ± 0.011
Bio-PET97/RCF03 32.2 ± 0.8 −0.3 ± 0.2 5.0 ± 1.3 graphic file with name ijms-20-01378-i004.jpg 1.291 ± 0.004
Bio-PET96/RCF04 28.1 ± 1.6 −0.4 ± 0.1 3.4 ± 0.9 graphic file with name ijms-20-01378-i005.jpg 1.294 ± 0.001
Bio-PET95/RCF05 26.6 ± 1.3 0.5 ±0.1 1.6 ± 0.7 graphic file with name ijms-20-01378-i006.jpg 1.296 ± 0.002
Bio-PET90/RCF10 26.6 ± 2.5 0.3 ± 0.2 1.0 ± 0.4 graphic file with name ijms-20-01378-i007.jpg 1.301 ± 0.003

L*: luminosity (+L luminous, −L dark); a*: red/green coordinates (+a red, −a green); b*: yellow/blue coordinates (+b yellow, −b blue).