NIR Portátil Aplicado à Avaliação de Resina, Cola e Aglutinante usados em Pinturas sobre Tela

Fábio Luiz Melquiades; Rafael Molari; Carlos  Roberto Appoloni

doi:10.5433/1679-0375.2025.v46.52197

Portable NIR Applied to the Evaluation of Resin, Glue and Agglutinant used in Canvas Paintings

Authors

Fábio Luiz Melquiades Universidade Estadual de Londrina https://orcid.org/0000-0003-1154-0339
Rafael Molari Universidade Estadual de Londrina https://orcid.org/0000-0002-7366-4639
Carlos Roberto Appoloni Universidade Estadual de Londrina https://orcid.org/0000-0002-0694-5596

DOI:

https://doi.org/10.5433/1679-0375.2025.v46.52197

Keywords:

archaeometry, canvas painting, NIR spectroscopy, exploratory analysis

Abstract

The aim of this work was to study various compounds commonly used in painting canvases by employing portable near-infrared spectroscopy (portable NIR) and to discriminate the compounds through exploratory statistical analysis of the spectra data. To this end, a painting specifically created for archaeometric analysis was examined. Two portable spectrometers with complementary wavelength ranges were combined for the measurements, one operating from 900 to 1700 nm (11100 - 5880 cm^-1) and the other from 1350 to 2150 nm (7400 - 4650 cm^-1). Portable NIR spectrometry identified characteristic spectral bands for each class of compound: waxes, binders, organic resins, and acrylic resins. Applying exploratory statistics via principal component analysis (PCA) allowed for material differentiation. This study demonstrated that combining NIR spectroscopy and PCA is a versatile tool for achieving consistent results in this application.

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Author Biographies

Fábio Luiz Melquiades, Universidade Estadual de Londrina

Prof. Dr., Applied Nuclear Physics Laboratory, Universidade Estadual de Londrina, Londrina, PR, Brazil

Rafael Molari, Universidade Estadual de Londrina

Prof., PhD in Physics, Applied Nuclear Physics Laboratory, State University of Londrina, Londrina, PR, Brazil (Expertise in Archaeometry).

Carlos Roberto Appoloni, Universidade Estadual de Londrina

Prof., PhD in Physics, Applied Nuclear Physics Laboratory, State University of Londrina, Londrina, PR, Brazil. (Senior Researcher in Applied Nuclear Physics with emphasis in Archaeometry)

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