by Lucian Cristian Ratoiu — Last updated on October 22, 2025 — Reading time: 20 min
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The INFRA-ART Spectral Data Collections is a blog article series that highlights key groups of art-related materials represented in the INFRA-ART Spectral Library. Each article focuses on a specific material category—examining its composition, technical details, and history of use—while also showcasing the spectral data collections available within the INFRA-ART database. By connecting material knowledge with accessible spectral reference data, the series aims to support research, education, and interdisciplinary engagement across the cultural heritage field.
WATERCOLORS in the INFRA-ART Database
Watercolor samples and available spectral data in the INFRA-ART Spectral Library
Professional Watercolor
| Sample name | Color Index | Sample ID | Supplier | Spectral data |
| Alizarin Crimson | PR 83 | WN0101004 | Winsor & Newton | FTIR, XRF |
| Aureolin | PY 40 | WN0101016 | Winsor & Newton | FTIR, XRF |
| Burnt Sienna | PR 101 | WN0101074 | Winsor & Newton | FTIR, XRF |
| Cerulean Blue | PB 35 | WN0101137 | Winsor & Newton | FTIR, XRF |
| Chinese White | PW 4 | WN0102150 | Winsor & Newton | FTIR, XRF |
| French Ultramarine | PB 29 | WN0101263 | Winsor & Newton | FTIR, XRF |
| Ivory Black | PBk 9 | WN0101331 | Winsor & Newton | FTIR, XRF |
| Lemon Yellow | PY 53 | WN0101347 | Winsor & Newton | FTIR, XRF |
| Olive Green | PY 65 + PB 15:6 + PR 101 | WN0101447 | Winsor & Newton | FTIR, XRF |
| Payne’s Gray | PB 15 + PBk 6 + PV 19 | WN0101465 | Winsor & Newton | FTIR, XRF |
| Permanent Rose | PV 19 | WN0101502 | Winsor & Newton | FTIR, XRF |
| Permanent Sap Green | PG 36 + PY 110 | WN0101503 | Winsor & Newton | FTIR, XRF |
| Raw Sienna | PY 42 + PR 101 | WN0101552 | Winsor & Newton | FTIR, XRF |
| Viridian | PG 18 | WN0101692 | Winsor & Newton | FTIR, XRF |
| Winsor Blue | PB 15 | WN0101707 | Winsor & Newton | FTIR, XRF |
| Winsor Red | PR 254 | WN0101726 | Winsor & Newton | FTIR, XRF |
| Winsor Violet | PV 23 | WN0101733 | Winsor & Newton | FTIR, XRF |
| Winsor Yellow | PY 154 | WN0101730 | Winsor & Newton | FTIR, XRF |
| Yellow Ochre | PY 43 | WN0101744 | Winsor & Newton | FTIR, XRF |
Cotman Watercolor
| Sample name | Color Index | Sample ID | Supplier | Spectral data |
| Alizarin Crimson Hue | PR 206 | WN0301003 | Winsor & Newton | FTIR, XRF |
| Burnt Sienna | PR 101 | WN0301074 | Winsor & Newton | FTIR, XRF |
| Burnt Umber | PBr 7 + PY 42 | WN0301076 | Winsor & Newton | FTIR, XRF |
| Cadmium Orange Hue | PO 43 + PY 83 | WN0301090 | Winsor & Newton | FTIR, XRF |
| Cadmium Red Deep Hue | PR 188 + PR 254 | WN0301098 | Winsor & Newton | FTIR, XRF |
| Cadmium Red Hue | PR 149 + PR 255 | WN0301095 | Winsor & Newton | FTIR, XRF |
| Cadmium Red Pale Hue | PR 255 + PY 65 | WN0301103 | Winsor & Newton | FTIR, XRF |
| Cadmium Yellow Hue | PY 65 + PY 97 | WN0301109 | Winsor & Newton | FTIR, XRF |
| Cadmium Yellow Pale Hue | PY 175 + PY 65 | WN0301119 | Winsor & Newton | FTIR, XRF |
| Cerulean Blue Hue | PB 15 | WN0301139 | Winsor & Newton | FTIR, XRF |
| Chinese White | PW 5 | WN0301150 | Winsor & Newton | FTIR, XRF |
| Cobalt Blue Hue | PB 29 + PW 5 | WN0301179 | Winsor & Newton | FTIR, XRF |
| Dioxazine Purple | PV 23 | WN0301231 | Winsor & Newton | FTIR, XRF |
| Emerald | PG 7 + PY 175 | WN0301235 | Winsor & Newton | FTIR, XRF |
| Gamboge Hue | PR 209 + PY 150 | WN0301266 | Winsor & Newton | FTIR, XRF |
| Hooker’s Green Dark | PB 15 + PG 7 + PY 139 | WN0301312 | Winsor & Newton | FTIR, XRF |
| Hooker’s Green Light | PB 15 + PG 7 + PY 139 | WN0301314 | Winsor & Newton | FTIR, XRF |
| Indian Red | PR 101 | WN0301317 | Winsor & Newton | FTIR, XRF |
| Indigo | PB 15 + PB 29 + PBk 7 | WN0301322 | Winsor & Newton | FTIR, XRF |
| Intense Phthalo Blue | PB 15 | WN0301327 | Winsor & Newton | FTIR, XRF |
| Intense Phthalo Green | PG 36 | WN0301329 | Winsor & Newton | FTIR, XRF |
| Ivory Black | PBk 9 | WN0301331 | Winsor & Newton | FTIR, XRF |
| Lamp Black | PBk 6 | WN0301337 | Winsor & Newton | FTIR, XRF |
| Lemon Yellow Hue | PY 175 | WN0301346 | Winsor & Newton | FTIR, XRF |
| Light Red | PR 101 | WN0301362 | Winsor & Newton | FTIR, XRF |
| Mauve | PR 122 + PV 23 | WN0301398 | Winsor & Newton | FTIR, XRF |
| Payne’s Gray | PB 15 + PB 29 + PBk 7 | WN0301465 | Winsor & Newton | FTIR, XRF |
| Permanent Rose | PV 19 | WN0301502 | Winsor & Newton | FTIR, XRF |
| Prussian Blue | PB 27 | WN0301538 | Winsor & Newton | FTIR, XRF |
| Purple Lake | PV 19 | WN0301544 | Winsor & Newton | FTIR, XRF |
| Raw Sienna | PR 101 + PY 42 | WN0301552 | Winsor & Newton | FTIR, XRF |
| Raw Umber | PBr 7 + PY 42 | WN0301554 | Winsor & Newton | FTIR, XRF |
| Rose Madder Hue | PR 206 | WN0301580 | Winsor & Newton | FTIR, XRF |
| Sap Green | PG 36 + PR 101 + PY 139 | WN0301599 | Winsor & Newton | FTIR, XRF |
| Sepia | PBk 7 + PBr 7 | WN0301609 | Winsor & Newton | FTIR, XRF |
| Turquoise | PB 15:3 + PG 7 | WN0301654 | Winsor & Newton | FTIR, XRF |
| Ultramarine | PB 29 | WN0301660 | Winsor & Newton | FTIR, XRF |
| Vandyke Brown | PBr 7 + PR 101 | WN0301676 | Winsor & Newton | FTIR, XRF |
| Viridian Hue | PG 7 | WN0301696 | Winsor & Newton | FTIR, XRF |
| Yellow Ochre | PY 42 | WN0301744 | Winsor & Newton | FTIR, XRF |
Designers Gouache
| Sample name | Color Index | Sample ID | Supplier | Spectral data |
| Alizarin Crimson | PR 83 | WN0605004 | Winsor & Newton | FTIR, XRF |
| Bengal Rose | PR 169 | WN0605028 | Winsor & Newton | FTIR, XRF |
| Brilliant Red Violet | PV 1 | WN0605050 | Winsor & Newton | FTIR, XRF |
| Cadmium Lemon | PY 35 | WN0605086 | Winsor & Newton | FTIR, XRF |
| Cerulean Blue | PB 35 | WN0605137 | Winsor & Newton | FTIR, XRF |
| Cobalt Blue | Pb 28 | WN0605178 | Winsor & Newton | FTIR, XRF |
| Cobalt Turquoise Light | PG 50 | WN0605191 | Winsor & Newton | FTIR, XRF |
| Perylene Black | PBk 31 | WN0605505 | Winsor & Newton | FTIR, XRF |
| Prussian Blue | PB 27 | WN0605538 | Winsor & Newton | FTIR, XRF |
| Rose Tyrien | PR 173 | WN0605593 | Winsor & Newton | FTIR, XRF |
| Ultramarine | PB 29 | WN0605660 | Winsor & Newton | FTIR, XRF |
| Zinc White | PW 5 | WN0605748 | Winsor & Newton | FTIR, XRF |
Further reading and resources
How to cite this resource
Ratoiu, L.C. (2025, Oct 22). INFRA-ART spectral data collections: watercolors. INFRA-ART Blog.
