Table 4. Optical Properties of the WTT Papersg.
| code | whiteness (ISO%) | brightness (ISO%) | yellowness (E313) | L | a | b |
|---|---|---|---|---|---|---|
| C | 62.3d | 68.0dc | –11.2d | 83.1 | 0.84 | –5.34 |
| 7S | 62.2d | 66.8d | –10.1e | 83.0 | 0.58 | –4.31 |
| 10S | 63.0cd | 69.8dc | –10.1e | 83.5 | 1.26 | –4.33 |
| 7S1D | 62.8cd | 70.0bc | –14.1b | 83.2 | 1.37 | –6.79 |
| 10S1D | 62.5d | 69.7bc | –14.1b | 83.2 | 1.09 | –6.68 |
| 7S12G | 63.3c | 70.5bc | –14.0b | 83.6 | 1.29 | –6.72 |
| 10S12G | 62.6d | 67.4c | –10.4e | 83.2 | 0.53 | –4.43 |
| 7S15G | 62.3d | 66.7c | –10.8e | 83.1 | 0.17 | –4.24 |
| 10S15G | 63.0c | 67.6bc | –10.0ef | 83.5 | 0.50 | –4.23 |
| 7S12G1D | 63.9bc | 72.2b | –16.5a | 83.9 | 1.11 | –7.23 |
| 10S12G1D | 63.9bc | 72.5a | –16.4a | 83.9 | 1.60 | –7.90 |
| 7S15G1D | 63.4bc | 72.2b | –16.8a | 83.7 | 2.01 | –8.22 |
| 10S15G1D | 65.8a | 72.6a | –12.7c | 84.8 | 1.08 | –5.74 |
g
Mean values with the same lowercase letters are not significantly different according to Duncan’s mean separation test