We are very pleased to announce the next edition of the NICAS Colloquium on Thursday 20 April from 12.00 to 13.00 hrs. The colloquium will take place in conference room B of the Atelier Building (Hobbemastraat 22, Amsterdam).
The chair of this colloquium will be Guus Verhaar (University of Amsterdam), PhD-candidate conducting research on glass sickness.
Please note that the next editions of the NICAS Colloquium will be on 11 May and 8 June 2017.
The following presentations are scheduled for this edition of the NICAS Colloquium:
Roberto Padoan - Quantitative monitoring of works of art on paper with spectral imaging.
The goal of this research is to determine potentials and limits of UV-VIS-NIR Spectral Imaging for the non-destructive quantitative monitoring of spectral changes that may occur in historical papers and writing media during exhibitions e.g. at the Rijksmuseum. Four spectral imaging instruments in Europe, with different technical specifications, have been used on the same set of reference targets and on samples that will be light aged at different humidity levels using the same LED illumination as is present in the exhibition rooms of the Rijksmuseum. The samples include: a historical blue paper, a light sensitive pastel, papers with foxing and metal intrusions, a sanguine (red chalk) and the Blue Wool Standard grade 1. All of them will be recorded a second time after accelerated ageing in order to assess the monitoring sensitivity. This research project is made possible by the Migelien Gerritzen Fund/Rijksmuseum Fund.
Roberto Padoan has a thirteen years’ experience as book and paper restorer/conservator at the Secret Vatican Archive and the National Archives of the Netherlands. He obtained his BA in “Methods and Technologies for the Conservation and Restoration of Library Heritage” at the University of Rome Tor Vergata (Italy), followed by a research master (Mres) in Heritage Science at the Institute for Sustainable Heritage, UCL (London). In September 2016 Roberto was granted the Migelien Gerritzen Fellowship and is now conducting research at the Rijksmuseum.
Kate van Lookeren Campagne - ‘Not too white’: an investigation into the influence of the use of calcium carbonate-rich imported marls on 17th – 18th century Dutch tin-glaze tile production.
Despite the fact that millions of Dutch tin-glaze tiles were produced and extensively exported during the 17th and 18th century, no significant research has been undertaken into the raw materials and techniques used in their production, information that is important for a beter understanding of deterioration processes. From the early17th century, Dutch delftware tiles were produced using local clays mixed with imported calcium carbonate rich ‘marl’. It is generally assumed that the imported calcium-carbonate-rich clay was added to influence the coefficient of expansion of the ceramic to prevent crazing of the glaze, but this research investigated the argument that a major factor for its use was a reduction of production costs due to its influence on the ceramic colour (a light body needing less tin oxide in the glaze) and mechanical strength (enabling the production of thinner tiles). In this PhD-project, carried out under the supervision of the UvA and RCE and with the collaboration of colleagues at TU Delft and LNEC in Lisbon, archival research into recipes and clay sources is combined with clay-recipe reconstructions in order to investigate the influence of the use of the imported marl on the ceramic product.
Kate van Lookeren Campagne is a ceramic and glass conservator and lecturer at the UvA. After working as a conservator in London and Paris she moved to the Netherlands in 1993 and began teaching at the Opleiding Restauratoren. She is assistant coordinator of the ICOM-CC Glass and ceramic working group and co-founder of the Dutch Glass and Ceramic Research Network.
More information about the NICAS Colloquium can be found here.
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