Table 1 Results of non-invasive analyses
ID point | Colorimetry | pXRF | Raman (cm−1) | Pigment | |||
|---|---|---|---|---|---|---|---|
Average L* | Average a* | Average b* | |||||
White | CB10, CB45, CB49, CB50 | 59.28 | 11.4 | 11.93 | Ca, Fe*, S*, Sitr, Ktr | ca. 280, 712, 1086 | Calcite |
Bright red | CB6, CB7, CB14, CB26, CB62, CB63, CB64 | 41.19 | 19.03 | 15.13 | Ca, Hg, S, Si*, Fe*, Al*, Ktr, Titr, Pbtr | ca. 251, 283, 340 | Cinnabar |
Dark red | CB8, CB9, CB17, CB18, CB25, CB51, CB56, CB57 | 45.48 | 10.49 | 10.64 | Ca, Fe, S*, Hg*, K*, Si*, Sr*, Al*, Ti*, Pb*, Cutr | ca. 225, 290, 413, 498, 616 | Red ochre |
Purple | CB1, CB5, CB24, CB27, CB31, CB32, CB42 | 46.04 | 10.09 | 8.38 | Ca, Fe, S*, Sr*, Si*, K* | ca. 225, 290, 413, 498, 617 | Hematite |
Pink | CB19, CB33, CB34, CB35, CB43, CB44, CB55 | 62.57 | 9.94 | 15.16 | Ca, S, Fe, Sr*, Si*, K* | ca. 247, 304, 361, 426, 509, 955, 1012, 1116, 1184, 1241, 1288, 1324, 1334, 1430, 1482, 1511, 1533,1616 | Calcite + Red ochre/hematite + organic pigment |
Yellow | CB4, CB15, CB21, CB39, CB40, CB41, CB60, CB61 | 60.51 | 11.04 | 31.98 | Ca, Fe, S*, K*, Si*, Ti*, Al* | ca. 245, 298, 386, 553 | Yellow ochre |
Black | CB2, CB3, CB16, CB20, CB28, CB36, CB37, CB59 | 36.71 | 5.06 | 4.78 | Ca, Fe*, S*, Ti*, Si*, K*, Al*, Ptr, Pbtr | ca. 1380, 1620 | Carbon black |
Green | CB11, CB12, CB13, CB29, CB30, CB38, CB53, CB54, CB58 | 51.54 | -9.97 | 5.80 | Ca, S, Cu, Fe, Cr, K*, Si* | - | Green earth + Egyptian blue |
Blue | CB46, CB47M CB48, CB65 | 66.50 | -3.50 | -2.50 | Ca, Cu, S, Cr, Fe*, Ti*, Si*, K* | - | Egyptian blue |
