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Heritage Science
Fig. 4 | Heritage Science

Fig. 4

From: Hidden in plain sight: revisiting the synthesis, characterisation, degradation and the intricate relationship between Scheele’s green and Emerald green

Fig. 4

Detailed comparisons of the FTIR spectra generated for synthesis C Trippkeite, Pertlik [8] in water and G Scheele’s, Saxena and Bhatnagar [11], D1 Method #11, Sharples [5], D2 Method #10, Sharples [5], D3 Method #11, modified with sodium arsenite, Sharples [5], E Scheele’s, Riffault et al. [43], H Scheele’s, Parker [9] and the spectra of pure copper sulphate for comparison (bottom), Y-axis has absorbance units

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