Programme start: 2012

CICRP programme director: Jean-Marc Vallet

Partnership(s): CNR-ISAC, Italy; LRMH; le Consiglio Nazionale delle Ricerche (Istituto di Scienze dell’Atmosfera e del Clima et Istituto di Chimica Inorganica e delle Superfici); le Nederlandse Organisatie voor Toegepast Natuurwetenschappelijk Onderzoek; la Fundacion TECNALIA Research & Innovation; Fraunhofer Gesellschaft zur Foerderung der Angewandten Forschung e.V.; AIDICO; Instituto Tecnológico de la Construcción; RED S.R.L.; NANO TEGO INC.; Bofimex Bouwstoffen B.V.; Metropolitankapitel der Hohen Domkirche Köln – Dombauverwaltung; Opera di Santa Croce Firenze; Eschlimann Restoration Workshop – Painting; T-O-P Oberflächen GmbH; SC DUCT SRL

The ‘nanomatch’ European project (nano-systems for the conservation of immovable and movable polymaterial Cultural Heritage in a changing environment), coordinated by A. Bernardi (CNR-ISAC, Italy), was launched at the end of 2011 for a duration of three years. Its purpose is to develop two conservation products using nanotechnology that can be applied to stone, wood (whether or not painted) and glass, and which provides better compatibility, effectiveness and durability than conventional products, while respecting the environment. The CICRP‘s contribution will be in the context of work evaluating the compatibility of these products, in terms of projects conducted by the LRMH on mural stone and paintings.


Programme start: 2011

CICRP: Philippe Bromblet (director)

Partnership(s): A-Corros (Arles); restorers: Alessandro Ingoglia, Emmanuel Desroches, Olivier Rolland, Sébastien Aze

The CICRP sought on the one hand to define specifications for water bath desalination and on the other to evaluate the possibility of using electrophoresis to optimise the effectiveness of this method.

Several restoration sites have formed the object of an in-depth follow-up to determine, with the help of restorers and architects, the main difficulties encountered in the course of water bath desalination, and to adapt this methodology accordingly. Moreover, a research internship has been created to test electrophoresis. Sections of columns highly deteriorated and contaminated by soluble salts have been used for comparative testing of desalination by static water baths and electrophoresis baths by varying the parameters (intensity of current, electrodes etc.). The results have not revealed higher effectiveness for the electrophoresis method, while confirming the reductions in pH and the attack risks to the stone in the course of the desalination by electrophoresis. Technical improvements (osmotic membranes) are being considered to improve the effectiveness of this technique.

Publications:

  • Internship report of Sabrina Brunel, trainee for the Professional Degree in conservation/restoration of built heritage for Arles (Aix-Marseille University): ‘Contribution of electrophoresis to the desalination of stone by bath in terms of effectiveness and safety’.
  • ‘Water bath desalination, protocols for optimisation’, ICOMOS technical day, Philippe Bromblet, communication.
  • Bromblet Ph., Vergès-Belmin V., Franzen C., Aze S. and Rolland O., ‘Toward an optimization of the specifications for water bath desalination of stone objects’, Salt Weathering on Buildings and Stone Sculptures, Proceedings from the International Conference, 19–22 October 2011, Limassol, Cyprus, 2011, pp. 397–404.