Table 3 Pigments, fillers and dyes identified in the tube colours by Raman, SEM–EDS, and HPLC
Trade name (Brand) | Nos. | Raman/SEM–EDS | HPLC |
|---|---|---|---|
Cadmium yellow dark (Pacht) | 2 | CdS orange | |
Cadmium yellow light (Pacht) | 2 | CdS yellow | |
Brilliant yellow (Pacht) | 2 | CdS yellow, ZnO | |
Cadmium lemon yellow (Pacht) | 1 | KCd2(CrO4)2(H3O2) | |
Chromium yellow light (Pacht) | 1 | PbCrO4, Pb3(CO3)(OH)2 | |
Viridian (Pacht) | 2 | Cr2O3·2H2O, Al2O3 | |
Viridian* (Pacht) | 2 | Cr2O3·2H2O, BaSO4, Si, carbon black | |
Chrome green light (Pacht) | 1 | Cr2O3·2H2O, CdS, ZnO, BaSO4 | |
Chrome green medium (Pacht) | 1 | Cr2O3·2H2O, CdS, KZn2(CrO4)2(H3O2), ZnO, BaSO4 | |
Cobalt blue (Pacht) | 2 | CoAl2O4·Al2O3 | |
Ivory black (Pacht) | 3 | C,Ca5(PO4)3(OH) | |
Snow white* (Pacht) | 1 | ZnO, carbon black | |
Green lake light (Averhoff) | 1 | Fe4[Fe(CN)6]3, BaSO4, Al | Naphthol yellow S, auramin O, martius yellow |
Madder lake golden rose (Pacht) | 1 | CaCO3, Mg3Si4O10(OH)2, Al, P | Purpurin, pseudopurpurin |
Madder lake deep rose (Pacht) | 2 | CaCO3, BaSO4, Al, P | Purpurin, alizarin |
Madder lake rose (Alman) | 1 | Al, P, S, Sn | Purpurin |
Carmine lake ordinary (Lefranc) | 1 | CaCO3, Al, Sn | Carminic acid |
Red oxide (Pacht) | 1 | CdS orange, Al | Purpurin, alizarin |
Red oxide (Averhoff) | 1 | Fe2O3, BaSO4, Al, P | Not analysed |
Red oxide (Averhoff) | 4 | CdS orange, Al, P | Not analysed |