Fig. 1From: Exploring elucidation of red dye mixtures on woolen historical textiles via non-destructive spectroscopic analysis and multivariate cluster analysisTwo pages of a Norwich patternbook produced by John Christopher Hampp (1750–1825) in Norwich, UK. Patternbooks contain textiles organized by number or pattern. Textiles 1027–1030 were analyzed in this manuscript. Courtesy, Winterthur Museum, Garden, and Library. Joseph Downs Collection. Accession Number 65 × 695.6. Photo credit: J. SchneckBack to article page