Table 2 Micro-samples from paintings for comparative benchtop analyses
Painting | Colour code reference | Documented varnish type | pFTIR spot sample area | pFTIR spot and micro sample coordinates (cm) | Sample type | Analytical method |
|---|---|---|---|---|---|---|
Woll 148 | Gr.02 (green paint) | Laropal K 80 grade 9 (1983) | Bottom right-hand corner—varnish layer over green paint | L 39.5–B 4.5 | Micro scraping and cross-section | ATR-FTIR, THM-GC/MS and microscopy |
Woll 148 | Bl.01 (blue paint) | Laropal K 80 grade 9 (1983) | Left edge—varnish in sky | L 1.5–B 50.5 | Micro scraping and cross-section | ATR-FTIR, THM-GC/MS and microscopy |
Woll 148 | Bl.02 (blue paint) | Laropal K 80 grade 9 (1983) | Mid sky—varnish | L 12.5–B 54 | Micro scraping | FTIR and THM-GC/MS |
Woll 224 | V.06 (blue/red paint) | Laropal K 80 grade 9 (1983) | Blue/red paint right side with varnish | L 32–B 3.5 | Micro scraping and cross section | ATR-FTIR, Raman, THM-GC/MS and microscopy |