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Figure 3 | Heritage Science

Figure 3

From: Winsor & Newton original handbooks: a surface-enhanced Raman scattering (SERS) and Raman spectral database of dyes from modern watercolor pigments

Figure 3

Raman analysis of cochineal-based pigments. (a) Raman spectrum of reference carmine naccarat compared to examples of Raman spectra obtained from Winsor & Newton cochineal-based pigments (λexc = 488 nm): (b) crimson lake 20th century edition, (c) crimson lake 19th century edition, (d) scarlet lake 19th century edition, and (e) dragons’ blood 20th century edition.

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