Table 1 Assignment of C 1 s regions
From: pH-dependent warping behaviors of ancient lacquer films excavated in Shanxi, China
| Carbon type | Binding energy (eV) | Corresponding chemical bonds |
|---|---|---|
| C1 | 284.8 | C–C or C–H |
| C2 | 286.3 ± 0.1 | C–O |
| C3 | 288.0 ± 0.1 | C= O or O–C–O |
| C4 | 289.0 ± 0.1 | O =C–OH |