title: Library of UV-Vis-NIR reflectance spectra of modern organic dyes from historic pattern-card coloured papers.
abstract: An accurate characterisation of the organic dyes used in artworks, especially those made of paper, is an important factor in designing safe conservation treatments. In the case of synthetic organic dyes used in modern works of art, for example, one frequently encountered difficulty is that some of these dyes are not still commercially available. Recognizing this problem, the authors of this paper present the results of an analysis of UV-Vis-NIR fibre optic reflectance spectra of 82 samples of dyed paper prepared with 41 dyes. The samples come from a historic book, The Dyeing of Paper in the Pulp, which was published by Interessen-Gemeinschaft (I.G.) Farbenindustrie in 1925. The dyes used in the paper pulp belong to the azo compounds, acridine, anthraquinone, azine, diphenylmethane, indigoid, methine, nitro, quinoline, thiazine, triphenylmethane, sulphur and xanthene classes.
authors.affiliation: Departamento de Conservação e Restauro, Faculdade de Ciências e Tecnologia, Universidade Nova de Lisboa, Monte de Caparica 2829-516, Portugal.
authors.forename: Cristina
authors.initials: C
authors.lastname: Montagner
authors.forename: Mauro
authors.initials: M
authors.lastname: Bacci
authors.forename: Susanna
authors.initials: S
authors.lastname: Bracci
authors.forename: Rachel
authors.initials: R
authors.lastname: Freeman
authors.forename: Marcello
authors.initials: M
authors.lastname: Picollo
mesh_terms: D001154:Art; D004396:Coloring Agents / Q000032:analysis* / Q000737:chemistry*; D003247:Conservation of Natural Resources; D010209:Paper; D013056:Spectrophotometry, Ultraviolet; D019265:Spectroscopy, Near-Infrared
chemical_list: D004396:Coloring Agents