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Heritage Science
Fig. 10 ( | Heritage Science

Fig. 10 (

From: Analytical studies on commercial artists’ colour charts from Das Deutsche Farbenbuch (1925)—identification of synthetic and natural organic colourants by Raman microscopy, surface-enhanced Raman spectroscopy and metal underlayer ATR-FTIR spectroscopy

Fig. 10 (

a) SERS spectrum of Rosalack by Turm Wasserfarben vs. Acid Red 51 and Acid Red 87; (b) SERS spectrum of Krapplack dunkel by Flamuco Tempera Farben vs. Acid Red 87 and alizarin; (c) MU-ATR-FTIR spectrum of Krapplack dunkel by Flamuco Tempera Farben vs. alizarin reference; (d) SERS spectrum of Paynes grau vs. Pigment Violet 1

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