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A new comprehensive concept for the conservation of stained glass windows

: Römich, H.; Fuchs, D.R.

Duran, A. ; Sociedad Espanola de Ceramica y Vidrio:
XVI. International Congress on Glass 1992. Proceedings. Vol. 7
Madrid: Industrias Graficas, 1992 (Boletin de la Sociedad Espanola de Ceramica y Vidrio 31C)
International Congress on Glass <16, 1992, Madrid>
Conference Paper
Fraunhofer ISC ()
coating; conservation; heteropolysiloxane; Methode; ormocere

Two materials, complementary to each other, were developed for the application in conservation of stained glass windows: Inorganic gels, prepared by sol-gel techniques, offer a promising new method for the consolidation of endangered paint layers. The fixation material was tailored for good adhesion to glass and long-term stability. The development and characterization were carried out on test pieces simulating loose paint on non-corrosive glass. First results of adhesion tests confirm the consolidation effect of the material. Further investigations on its efficiency on corrosion-sensitive model glasses and originals will be carried out before recommending the method for the restorer's workshops. The supplementary protective coating is based on a heteropolysiloxane (ORMOCER) in combination with inorganic fillers. The laboratory test phase of this system is considered to be completed. The two new materials can be combined to a new comprehensive conservation concept: local, irreversible fixation of endangered paint contours and reversible protection of the whole glass surface by extensive application of the ORMOCER coating.