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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