We report a non-invasive and multi-analytical physico-chemical method for the characterization of paper artworks, able to identify sizing, inks, and glues and to quantify oxidative degradation by-products. The proposed methodology is mostly carried out in situ by using easy-to-use and cheap portable instrumentation for the acquisition of multispectral images, punctual ultraviolet-visible-near infrared fiber-optics reflectance spectroscopy (FORS) and punctual fiber optics fluorescence spectroscopy. Further analytical information is provided by non-invasive in-situ sampling of paper surface by using soft latex sponges, making possible laboratory chromatographic and infrared spectroscopic analyses on the aqueous sponge extracts. The proposed diagnostics method was applied to two 17th century letters written by St Francis of Sales (1567–1622), collected at the Chigi Palace in the town of Ariccia (Italy). Results show an intense oxidative degradation of the letters, also localized in water spots, and the presence of carboxylic acids by-products. Analysis of FORS spectra provided the concentration of chromophores in the paper substrate. The diagnostic method allowed the identification of gelatin sizing, the presence of starch glue in specific areas of the letters and the type of ink used in the text. Our diagnostic approach aims to offer to conservator-restorer a characterization of a paper artwork, that can be applied to other, for a correct planning of conservation interventions.

Titubante, M., Marconi, C., Citiulo, L., Mosca Conte, A., Mazzuca, C., Petrucci, F., et al. (2022). Analysis and diagnosis of the state of conservation and restoration of paper-based artifacts: a non-invasive approach. JOURNAL OF CULTURAL HERITAGE, 55, 290-299 [10.1016/j.culher.2022.04.003].

Analysis and diagnosis of the state of conservation and restoration of paper-based artifacts: a non-invasive approach

Mosca Conte A.;Mazzuca C.;Petrucci F.;Pulci O.;Micheli L.;
2022

Abstract

We report a non-invasive and multi-analytical physico-chemical method for the characterization of paper artworks, able to identify sizing, inks, and glues and to quantify oxidative degradation by-products. The proposed methodology is mostly carried out in situ by using easy-to-use and cheap portable instrumentation for the acquisition of multispectral images, punctual ultraviolet-visible-near infrared fiber-optics reflectance spectroscopy (FORS) and punctual fiber optics fluorescence spectroscopy. Further analytical information is provided by non-invasive in-situ sampling of paper surface by using soft latex sponges, making possible laboratory chromatographic and infrared spectroscopic analyses on the aqueous sponge extracts. The proposed diagnostics method was applied to two 17th century letters written by St Francis of Sales (1567–1622), collected at the Chigi Palace in the town of Ariccia (Italy). Results show an intense oxidative degradation of the letters, also localized in water spots, and the presence of carboxylic acids by-products. Analysis of FORS spectra provided the concentration of chromophores in the paper substrate. The diagnostic method allowed the identification of gelatin sizing, the presence of starch glue in specific areas of the letters and the type of ink used in the text. Our diagnostic approach aims to offer to conservator-restorer a characterization of a paper artwork, that can be applied to other, for a correct planning of conservation interventions.
Pubblicato
Rilevanza internazionale
Articolo
Esperti anonimi
Settore CHIM/01
Settore CHIM/02
Settore FIS/01
English
Ancient paper
Cellulose degradation
In-situ sampling
Non-invasive diagnostic
Sizing, inks
Regione Lazio under the ADAMO project n. B86C18001220002 of the centre of Excellence at the Technological District for Cultural Heritage of Lazio (DTC). We 297 [57]134647 M. Titubante, C. Marconi, L. Citiulo et al. Journal of Cultural Heritage 55 (2022) 290–299 acknowledge funding of Regione Lazio (through L.R. 13/08 Progetto Gruppo di Ricerca MICROARTE n. prot. A0375–2020–36515) and funding from the National Research Council of Italy under the Project n. B86C19000230005 of the Joint Bilateral Agreement CNR/CACH Biennial Programme 2019–2021
Titubante, M., Marconi, C., Citiulo, L., Mosca Conte, A., Mazzuca, C., Petrucci, F., et al. (2022). Analysis and diagnosis of the state of conservation and restoration of paper-based artifacts: a non-invasive approach. JOURNAL OF CULTURAL HERITAGE, 55, 290-299 [10.1016/j.culher.2022.04.003].
Titubante, M; Marconi, C; Citiulo, L; Mosca Conte, A; Mazzuca, C; Petrucci, F; Pulci, O; Tumiati, M; Wang, S; Micheli, L; Missori, M
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Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/2108/303004
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