Publications by authors named "Frederique Broers"
, one of the most famous masterpieces by Rembrandt, is the subject of a large research and conservation project. For the conservation treatment, it is of great importance to understand its current condition. Correlated nano-tomography using x-ray fluorescence and ptychography revealed a-so far unknown-lead-containing "layer", which likely acts as a protective impregnation layer applied on the canvas before the quartz-clay ground was applied.
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- Paintings contain various chemical compounds that can degrade over time, significantly affecting their appearance.
- The main focus of the study is on how the medium surrounding arsenic sulfide pigments, specifically orpiment, influences their degradation, revealing the formation of both arsenolite and arsenate species.
- Results indicate that in the presence of a medium, As(V) species can migrate and react over time, causing structural stress in the paint and leading to visual changes like cracks or delamination.
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- Rembrandt's "The Night Watch," painted in 1642, is renowned and housed in the Rijksmuseum, Amsterdam.
- Recent research using X-ray powder diffraction uncovered the presence of lead(II) formate, a compound not previously found in historical oil paints, in multiple areas of the painting.
- The study involved creating model oil paint media from 17th-century recipes to explore the chemical processes, and sophisticated techniques identified new lead-based compounds, enhancing our understanding of lead reactivity in old paintings.
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- Artist pigments can degrade over time, altering both the appearance of artworks and the artist's original intent.
- The article uses a still life painting by A. Mignon as a case study to explore the visual effects of degradation on a yellow rose.
- Advanced imaging techniques, like MA-XRPD and x-ray fluorescence, revealed how degradation products impacted the painting’s light-shadow modeling, highlighting changes caused by lead arsenates and fading pigments.
Among the artists' materials of the nineteenth century, pastel crayons merit scientific interest since their early commercial formulations are mostly unknown and, until now, have been considerably less studied with respect to other contemporary painting materials. In this framework, research herein reports the results of a comprehensive multi-analytical study of 44 pastel crayons of two recognized brands (LeFranc and Dr. F.
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