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1993
Conference paper (published)
The refractive index of nineteenth century paint media: a preliminary study
Townsend, Joyce H.
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1999
Conference paper (published)
A technical assessment of eight portraits by Reynolds being considered for conservation treatment
Eight portraits at the Tate Gallery by Sir Joshua Reynolds (1723-1792) were examined to assess whether the varnishes could be removed safely. Analysis of the paint medium was carried out with DTMS (direct temperature-resolved pyrolysis mass spectrometry), varnish having been removed beforehand in test cleans by a variety of methods....Jones, R. R. ; Townsend, Joyce H. ; Boon, Jaap J.
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1993
Conference paper (published)
Colour transparencies : studies on light fading and storage stability
The stability of four types of colour transparencies is discussed, for storage at room temperature, storage at elevated temperature and relative humidity (RH), and for accelerated light ageing. When complicating factors such as heat and RH sensitivity and colour recovery in the dark are taken into account, the film can...Townsend, Joyce H. ; Tennent, Norman H.
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1996
Conference paper (published)
Turner's 'drawing book', the Liber Studiorum: materials and techniques
Townsend, Joyce H.
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2002
Conference paper (published)
Pre-Raphaelite technique, and its consequences
Hackney, Stephen ; Ridge, Jacqueline ; Townsend, Joyce H.
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1982
Conference paper (published)
A simple integrating dosimeter for ultraviolet light
The ISO Blue Wool standard is useful for measuring UV light only for an extended period of a couple of years. The work reported was undertaken in order to find a suitable material which could be used as a dosimeter for UV radiation and would complement the use of the...Tennent, Norman H. ; Townsend, Joyce H.
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1984
Conference paper (published)
The significance of the refractive index of adhesives for glass repair
Tennent, Norman H. ; Townsend, Joyce H.
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2014
Conference paper (published)
Kurt Schwitters’ British sculptures: materials analysis and assessment of stability
The first technical study of Kurt Schwitters’ small sculptures and three-dimensional mixed-media collages known as assemblages, made in the 1940s in Britain, was carried out using low magnification and ultraviolet examination, and x-radiography. Paint and plaster samples were analysed using SEM/EDX, FTIR and examination of cross sections. Some sculptures were...Townsend, Joyce H. ; von Aderkas, Nelly ; Ormsby, Bronwyn ; Sofer, Gates