Layer | Color | Pigment/dye/foil | Method |
---|---|---|---|
Ground coat layer | Light grey/brownish | Quartz (SiO2) Anorthite [Ca(Al2Si2O8)] | XRD |
Blue paint layer | Sky blue | Indigo (C16H10N2O2) | Raman |
White paint layer | White | Chalk (CaCO3) | Raman |
Gold-colored layer | Golden | Gold-silver (quite possibly 76Au:24Ag, wt%) | EDX |
Other colors on Hexi painting | White | Lead white (2PbCO3·Pb(OH)2) | EDX, Raman |
Dark emerald green | Atacamite [Cu2(OH)3Cl] | EDX, XRD | |
Dark red | Hematite (α-Fe2O3) | Raman | |
Black | Carbon black (C) | Raman |