Netherlands Institute for Conservation, Art and Science

NICAS Colloquium

23Nov2017 12:00 - 13:00


The next edition of the NICAS Colloquium takes place on Thursday, 23 November 2017, from 12:00 to 13:00 in conference room B of the Atelier Building (Hobbemastraat 22, Amsterdam).


The chair of this colloquium will be Jonas Veenhoven (KIK/IRPA, Ghent University), PhD candidate in the NICAS partner project PHYSICAL.


The following presentations are scheduled for this edition of the NICAS Colloquium:

Art Néss Proaño Gaibor

Fugitive purple technology: new insights from secondary chemical research and historic informed reconstructions

Using mild extraction methods for dye analysis have in recent years led to a better identification of light sensitive colorants in textiles. In combination with more sensitive detectors of chromatographic techniques, we are able to identify dye sources even in almost completely faded objects. The obtained data from 2011 was revisited for purple colorants and new patterns in the chromatograms were discovered. In addition to the analytical data, secondary research of the dye source, like historically informed reconstructions, can shed light into long lost dye technologies. Theme in this presentation is purple dyes in objects dating from the late antique period to the 19th century, with specific examples of synthetic mauveine, natural lichens dyes and purple sea snail dyes.

Art Néss Proaño Gaibor graduated from the Regional Chemistry Laboratory of Amsterdam in 2008. He has been a conservation and restoration specialist at the Cultural Heritage Agency of the Netherlands since 2017.


Maarten van Bommel

TooCOLD: Toolbox for studying the Chemistry of Light-induced Degradation

This presentation will introduce a new project just granted by STW (now TTW, part of NWO). The aim is to develop a new tool to study light-induced degradation of components in a solution. Although a quite fundamental approach, we hope to learn more about the behavior of a wide range of components under the effect of intense UV/Vis irradiation. This information can lead to more knowledge about the original appearance of objects of art, possibly a prognosis of future behavior and to new mitigation strategies. Although cultural heritage is obviously the main interest of the NICAS audience, the tool will be also used in other domains, especially food safety and water purification. The project is supported by STW, Unilever, van Gogh Museum, cultural heritage agency of the Netherlands, water cycle research institute, PWN technology and Da Vinci Laboratory solutions.

Maarten van Bommel is professor of Conservation Science at the University of Amsterdam. He has a background in analytical chemistry, and was previously employed as a senior scientist at the Cultural Heritage Agency of the Netherlands.

NICAS Colloquium

More information about the NICAS Colloquium can be found here.



Thursday, 23 November 2017


12:00 – 13:00 hrs


Conference Room B, Atelier Building
Hobbemastraat 22, Amsterdam

Published by  NICAS