Table 3 Microstructural observation of pigments and SEM–EDS point analysis results
Sample | Green | White | Red | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
SEM image |
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SEM–EDS | Concentration (wt%) | |||||||||||
C | O | Al | Si | Cl | K | Ti | Fe | Pb | Cu | Sn | Total | |
Green | 41.21 | 25.14 | – | – | 5.3 | – | – | – | 3.73 | 23.68 | 0.93 | 100 |
White | 11.91 | 55.89 | 0.25 | 31.95 | – | – | – | – | – | – | – | 100 |
Red | 26.91 | 37.22 | 5.67 | 7.05 | – | 1.49 | 0.19 | 19.97 | – | – | – | 100 |
