The next edition of the NICAS Colloquium takes place on Thursday, 14 June 2018, from 12:00 to 13:00 in conference room B of the Atelier Building (Hobbemastraat 22, Amsterdam).
The chair of this colloquium will be Arie Pappot (Rijksmuseum/UvA), PhD-candidate in the NICAS Partner project Copper in the Dutch Golden Age.
The following presentations are scheduled for this edition of the NICAS Colloquium:
Historical formulations of lac lake pigments and dyes: a study of the compositional variability
Lac is an oriental organic insect based colourant that was used as a lake pigment or a dye throughout history. Although historical sources indicate extensive usage, findings in historical samples remain scarce. This can be attributed to a number of factors: it is often present at low concentrations, in mixture with other colourants, and prone to acid degradation during commonly used sample extractions methods. This master thesis research carried out at the British Museum in London investigates the effect of the production method on the compositional variability of lac. This was accomplished through a combination of research on historical recipes, the creation of mock-up samples, and their analysis by o.a. HPLC-DAD-ESI-Q-ToF. Following this, recommendations are made to the usage of mass-spectrometry in the identification of colourants due to its capability of detecting non-colourant molecules that can present in the pigment or dye due to production methods.
Sanne Berbers is due to graduate this summer from her two master’s degrees in Conservation & restoration – specializing in museum science, and Analytical chemistry at the University of Amsterdam.
Annelies van Hoesel
Glaze composition of 17th - 18th century Dutch Delftware
The Rijksmuseum is working on a new catalogue of its collection of Dutch Delftware, in which art historical information is combined with analytical material research. The goal of the technical part of the project is to enhance the understanding of the glaze technology and provide scientific support for the attribution of objects to specific periods and places of production using non-destructive XRF-spectroscopy. This research focusses on the composition of the white tin-glaze and blue inglaze decoration of approximately 450 marked objects dating from the 17th and 18th centuries and attributed to several factories in the town of Delft. These objects will used as a reference for when unmarked objects are measured. Results of the first ~75 marked objects are presented.
Annelies van Hoesel obtained her PhD in Earth Sciences in Utrecht. She has completed a postdoc in archaeology at Leiden University and worked as a researcher at the RCE. Currently she is working on two projects at the Rijksmuseum: 'Delftware 2.0' and 'Visualization of Watermarks'.
More information about the NICAS Colloquium can be found here.
Thursday, 14 June 2018
12:00 – 13:00 hrs
Conference Room B, Atelier Building
Hobbemastraat 22, Amsterdam
Hobbemastraat 22 | 1071 ZC AmsterdamGo to detailpage