Table 1.
Physico-chemical properties of the edible coatings (Mean ± SD, n = 3)
| Parameter | Shellac | Aloe gel | Shellac + Aloe gel |
|---|---|---|---|
| Total solids (%) | 4.0 ± 0.1a | 1.0 ± 0.1b | 4 ± 0.1a |
| pH | 7.5 ± 0.1a | 5.7 ± 0.1b | 7.5 ± 0.1a |
| Viscosity (cp, at 30 °C) | 17.4 ± 0.1a | 9.8 ± 0.1b | 17.6 ± 0.1a |
| Drying time (min) | 4.1 ± 0.1b | 3.6 ± 0.1a | 5.0 ± 0.1c |
| OTR (cc/m2/day/atm, at 75 % RH and 30 °C) | 460 ± 10a | 1560 ± 25c | 650 ± 15b |
| CTR (cc/m2/day/atm, at 75 % RH and 30 °C) | 980 ± 30a | 1200 ± 4 °C | 1500 ± 30b |
| WVTR (g/m2/day/atm, at 75 % RH and 30 °C) | 5.6 ± 0.2a | 78.2 ± 1.4c | 9.2 ± 0.2b |
| L* | 4.15 ± 0.12a | 56.8 ± 0.16b | 4.19 ± 0.11a |
| a* | 2.13 ± 0.03a | −1.37 ± 0.01b | 2.08 ± 0.02a |
| b* | 0.32 ± 0.02a | 4.67 ± 0.03c | 0.45 ± 0.1b |
*Values with different superscript in same row differ significantly (P < 0.05)