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Heritage Science
Fig. 4 | Heritage Science

Fig. 4

From: Multi-instrumental approach with archival research to study the Norwich textile industry in the late eighteenth and early nineteenth centuries: the example of a Norwich pattern book dated c. 1790–1793

Fig. 4

Chromatogram and selected UV–visible spectra for: a purple pattern 4, page 1, Norwich worsted pattern book (c. 1790–1793), accession number 65 × 695.3, Winterthur Museum, Garden and Library and b orchil standard (ACROS Organics™, pure, certified) undergoing mild hydrolysis. Displayed UV–visible spectra correspond to characteristic components found in all purple samples except patterns 374 and 439, in which no dye components were detected

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