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The visual aspects, homogeneities, and microstructures (SEM images) of uncoated (0:0, control) and coated paperboards with different numbers of coating layers (NCL). The polymers were used in different agar–agar/chitosan (AA:CHI) ratios.
| Ratio (AA:CHI) | NCL | Visual Aspect | Homogeneity | |
|---|---|---|---|---|
| Control/Coating Side | Uncoated Side | |||
| 0:0 (Control) | - |
|
|
|
| 100:0 | 1 |
|
|
|
| 2 |
|
|
|
|
| 50:50 | 1 |
|
|
|
| 2 |
|
|
|
|
| 0:100 | 1 |
|
|
|
| 2 |
|
|
|
|
