Table 1 Information of the samples
Sample No. | Image of the sample | Side | Description |
|---|---|---|---|
S1 |
| Front side | Partially covered with red pigment and partially exposed rock. |
S1 |
| Back side | Rock without pigment coverage. |
S2 |
| Front side | Partially covered with red pigment and partially exposed rock. |
S2 |
| Back side | Rock without pigment coverage. |
S3 |
| Front side | Well-covered by red pigment. |
S3 |
| Back side | Rock without pigment coverage. |
S4 |
| Front side | Completely covered by red pigment, but with partial flaking. |
S4 |
| Back side | Rock without pigment coverage. |
