Please use this identifier to cite or link to this item: http://hdl.handle.net/10174/28038

Title: On the Use of Fibre­Optic Reflectance Spectroscopy (FORS) in the Ultraviolet and Visible Range (UV-Vis) for the Analysis of Organic Lake-Pigments in a Mid-16th Century Illuminated Antiphonary – a Chemometric Approach
Authors: Miguel, Catarina
Jacobs, Whitney
Barrocas Dias, Cristina
Manhita, Ana
Ferreira, Teresa
Fialho Conde, Antónia
Candeias, António
Keywords: Antiphonary
illuminations
FORS
chemometrics
LC/DAD/MS
Issue Date: 2020
Publisher: ACAD Organisation
Citation: Catarina Miguel, Whitney Jacobs, Cristina Barrocas Dias, Ana Manhita, Teresa Ferreira, Antónia Fialho Conde and António Candeias, On the Use of Fibre­Optic Reflectance Spectroscopy (FORS) in the Ultraviolet and Visible Range (UV-Vis) for the Analysis of Organic Lake-Pigments in a Mid-16th Century Illuminated Antiphonary – a Chemometric Approach, Eur. J. Sci. Theol. (2020) 16, 3, 151-164
Abstract: The dye source of the organic pink-lake pigments used to produce reddish-to-pink paints present in six representative illuminated capital letters of a mid-16th century illuminated Antiphonary housed in the Biblioteca Pública de Évora, Portugal - the Manizola 116c - was studied in-situ by non-invasive Fibre Optic Reflectance Spectroscopy (FORS) in the UV-VIS range. Historically accurate reproductions of pink lake pigments were used for calibrating the Principal Component Analysis (PCA) where historical FORS spectra were projected. The chemometric approach indicated the use of cochineal to produce the reddish (cochineal acidic form) and pink-purple (cochineal basic form) hues to obtain the painting layer. Two representative micro-samples were analysed by LC/DAD/MS, confirming the use by the illuminator of cochineal in its acid-basic equilibrium to produce different shades of reddish-to-pink colours across the manuscript.
URI: http://hdl.handle.net/10174/28038
ISSN: 1842 - 8517
Type: article
Appears in Collections:HERCULES - Publicações - Artigos em Revistas Internacionais Com Arbitragem Científica

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