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Color difference of the VBTL powders
| VBTL particles (μm) | L | a | b |
|---|---|---|---|
| 125–300 | 34.02 ± 1.233c | 3.96 ± 0.754a | 14.66 ± 0.885a |
| 75–125 | 32.68 ± 0.698c | 4.23 ± 1.024a | 15.15 ± 1.374a |
| 75–40 | 28.43 ± 1.134b | 4.87 ± 0.589a | 16.98 ± 0.668b |
| <40 | 24.67 ± 0.955a | 5.02 ± 0.717a | 18.64 ± 0.431b |
Values were mean ± SD of three determinations. The lower case letters of a–c are significantly different in the same column, P < 0.05
