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Francien Bossema is a PhD student at the Centrum Wiskunde & Informatica (CWI) on the topic of Computational Imaging for Cultural Heritage. Her research is part of the NWO/NICAS funded Impact4Art project in a collaboration between CWI and the Rijksmuseum. During this presentation she presents the research on the Hugo de Groot book chest. In the ‘Historisch Bewijs’ series, the following question was asked: ‘Can we determine which of three candidate chests, if any, is the original in which Hugo de Groot escaped Castle Loevestein?’. The investigations led to a novel X-ray imaging method for dendrochronology of large wooden objects. Dendrochronology is an important tool to determine the date and provenance of historical wooden art objects, based on tree rings. These are not always accessible on the outside and thus X-ray computed tomography (CT) has been applied to visualise the tree rings non-invasively. For large objects it is often impossible to rotate fully within the scanner as is necessary for CT. The research team developed a line trajectory X-ray tomography technique, in which the object is moved only sideways. Using this easily implementable scanning trajectory, sharp reconstruction images of the tree rings can be obtained. This interdisciplinary project was recently awarded an NWO Team Science Award.

In September 2021, NICAS launched the international project ‘A Global Infrastructure for Heritage Science’, made possible by The Andrew W. Mellon Foundation. The initial phase will map out the common ground between different cultures of conservation and find ways that interdisciplinary and international collaboration can be better used to preserve the material integrity of the object, its layered cultural significance, and its historical context. The international and interdisciplinary team of six Research Associates will introduce ourselves and our goals, which include identifying the major global challenges faced by the field now and in the future, and the opportunities that exist for more fruitful collaboration. We invite attendees to join the conversation and share their experiences, insights, and ideas.

In this NICAS-colloquium presentation, Sanne Berbers will share her PhD project which she started in September 2021. The research will focus on the relation between lipids and synthetic organic pigments (SOP’s). The combination of SOP’s and oil paint in 20th and 21st century oil paints has been shown to give problem of solubility of the paint, migration of SOP components, and colour fading. The lipid fraction and SOP’s of these paints have not yet been studied in relation to each other. This includes both chemical changes and interactions that occur at the start of the drying process and those that occur when the painting ages over time.