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Optical properties in terms of lightness (L*), chroma (Cab*), hue angle (hab*), and internal transmittance (Ti) at 550 nm of the polylactide (PLA), M1, and M2 multilayer films.
| Film | L* | Cab* | hab* | Ti (550 nm) |
|---|---|---|---|---|
| PLA | 94.9 ± 1.0 a | 4.3 ± 1.0 a | 127 ± 7.0 a | 0.93 ± 0.004 a |
| M1 | 84.6 ± 1.0 b | 2.6 ± 0.4 b | 132 ± 4.0 a | 0.90 ± 0.01 b |
| M2 | 85.6 ± 1.0 b | 1.9 ± 0.2 c | 148 ± 1.4 b | 0.91 ± 0.01 b |
a–c Different superscript letters within the same column indicate significant differences among the samples (p < 0.05).
