J.CAC VOLUME 46 (2021–22)

Materials and Techniques of Louis Dulongpré: Six Religious Paintings from 1805 to 1823

Kate Helwig, Sophie Roberge, Debra Daly Hartin, Jennifer Poulin

Results of a technical study of six oil-on-canvas religious paintings by Louis Dulongpré are presented, supplementing previously published research on Dulongpré’s portraits. The earliest painting in the study is a signed and dated work from 1805, while the latest paintings studied are from c. 1823. Visual examination was followed by sampling and analysis using a multi-instrumental approach. Primary methods were scanning electron microscopy/energy dispersive X-ray spectrometry (SEM/EDS), Fourier transform infrared (FTIR) spectroscopy, Raman spectroscopy and polarized light microscopy (PLM). In some cases, X-ray diffraction (XRD), gas chromatography/mass spectrometry (GC-MS) and/or pyrolysis-gas chromatography-mass spectrometry (Py-GC-MS) were also undertaken. The technical data from these religious paintings, together with those from the previous study of Dulongpré’s portraits, can contribute to attribution research and inform future conservation treatments.

Download: JCAC46 Helwig et al.