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b ∗ value and difference before and after the aging of silicone rubber specimens coated with nano-TiO2 with different concentrations of silicon and aluminum (F = 1951.636, P < 0.05).
| Chromatic aberration | Concentration | |||
|---|---|---|---|---|
| 0% | 0.05% | 0.10% | 0.15% | |
| Front | 15.22 ± 0.50 | 7.57 ± 0.48 | 5.15 ± 0.21 | 1.09 ± 0.09 |
| After | 23.20 ± 0.47 | 13.40 ± 0.52 | 9.72 ± 0.21 | 10.00 ± 0.15 |
| Δb∗ | 7.98 ± 0.10 | 5.83 ± 0.10 | 4.57 ± 0.10 | 8.91 ± 0.12 |
