Glass - Back to the Future!



Presenting Author:
Jonathan Cooke
<info@stainedglassconservation.co.uk>

article posted 13 Jun 2016


Jonathan Cooke

Jonathan Cooke ACR served a traditional four-year apprenticeship at York Minster: he has worked as an independent stained glass conservator since 1987. He undertakes stained glass conservation projects throughout the UK and beyond: most are ecclesiastical, and he also works for a number of national and regional museums, the National Trust and private clients. He teaches glass-painting regularly at Swansea and elsewhere - this year in Trondheim and York. His glass-painting manual Time and Temperature was published by Swansea Metropolitan University in 2012.






Glass jigsaw puzzles; a conservator's notebook

Jonathan Cooke
Jonathan & Ruth Cooke Ltd, Stained Glass Conservation, 5 Tivoli Place, Ilkley, LS29 8SU
phone: 01943 602521 mobile: 07968 967490


Architectural glass is vulnerable to loss through neglect, accidental or intentional damage, and deterioration over time, and with each successive restoration and rearrangement of what remains.

Attitudes to the stained glass of previous generations have varied at different periods: the concept of the 'conservation glazier' is arguably something of a late c20 phenomenon. Previous restorations and reorderings present complex challenges: while there are more advanced conservation techniques and materials now available, the ethical debate about the purpose as well as the scope of any restoration continues, and this is particularly sensitive in the case of degraded or jumbled ecclesiastical glazing. In the nineteenth century and sometimes later, restoration of ancient glass could include a generous amount of artistic licence. In the recent past, conservation has sometimes resulted in a fossilisation of an intermediate arrangement at an arbitrary point in its existence; there are also instances of careful collaborations to achieve improvements in legibility. Sometimes the glass is deemed to be beyond practical conservation by any known means.

Using a series of varied examples, this presentation provides an overview of dilemmas encountered by the conservator, client and heritage bodies, and an insight into decision making processes and contrasting results of various 'conservation' interventions.