AHRC Collaborative Doctoral Partnership PhD studentship
The National Gallery, Scientific Department & Nottingham Trent University, 
School of Science & Technology
Conservation varnishes at the National Gallery: studying their optical and 
material properties
Applications are invited for a Collaborative Doctoral Partnership PhD 
studentship, to be undertaken at Nottingham Trent University (School of Science 
& Technology) and the National Gallery (Scientific Department). This three-year 
(full-time) studentship commences on 1 October 2017 and will be jointly 
supervised by Professor Haida Liang (Nottingham Trent University) and Dr 
Catherine Higgitt (National Gallery). The student may undertake a (remunerated) 
6 month placement at the Gallery during the PhD to further develop and expand 
their skills. The student will need to spend concentrated periods of time both 
in Nottingham and London. This interdisciplinary project involves close 
collaboration between physicists, conservation scientists and conservators.

Historically and today, conservation varnishes are applied to Old Master 
paintings after cleaning and restoration, altering a painting's appearance by 
saturating the surface and reducing variation in gloss. Optical, chemical and 
physical properties are crucial in selecting a varnish with suitable aesthetic 
characteristics. Many varnishes become yellow and cloudy over time, so 
stability is also important in order to limit how often they need to be removed 
and replaced. Understanding of such properties is largely based on experimental 
studies or the expected properties of the bulk resin, which do not always 
accurately reflect the behaviour of thin varnish films. Furthermore, in 
practical usage, conservators often adjust formulations to obtain a varnish 
with a satisfactory appearance.

This project will investigate the properties of conservation varnishes, to 
predict more accurately how they will behave in practice and how they might be 
improved or modified for particular applications, based on the use of 
cutting-edge non-invasive imaging techniques, especially optical coherence 
tomography (OCT), to allow (non-subjective) assessment of their appearance, 
condition and properties. OCT produces 3D images (‘virtual’ cross-sections) of 
surface and subsurface microstructure of (semi)-transparent materials and shows 
promise for research on varnishes. OCT and other non-invasive portable 
equipment, and more traditional chemical analysis will be used to investigate 
the effect of not only the choice of resin but also practical issues of 
formulation and application method on varnish properties. The research will 
draw on the unique resource of the actual, naturally aged conservator-applied 
varnishes on Gallery paintings and also experimental systems in which 
formulations and application method can be explored. The research outcomes have 
the potential to feed directly into conservation practice at the National 
Gallery and around the world.

Applicants must have a good first degree (usually a minimum 2:1) or a Masters 
degree (or equivalent experience) in physics, chemistry, materials science, 
conservation science, heritage science, archaeological science, or a related 
physical science discipline, or conservation (in which case a first degree in a 
physical science subject is desirable). They should be highly motivated 
individuals with a keen interest in art history and conservation, and in 
conducting interdisciplinary research. The project would suit a candidate 
interested in a career in conservation science or a scientist with an interest 
in applying cutting-edge scientific techniques and complex data processing 
methods to challenging questions such as those posed by cultural heritage 
artefacts. Students must also meet eligibility requirements of the Art and 
Humanities Research Council for graduate students. The minimum English language 
proficiency requirement for candidates who have not undertaken a higher degree 
at a UK HE institution is IELTS 6.5 (with a minimum of 6.0 in all skills).

The full studentship award for students with UK residency includes fees, a 
stipend of £14,553 per annum plus £550 p.a. additional stipend payment for 
Collaborative Doctoral students for 3 years. In addition, the Student 
Development Fund (equivalent to 0.5 years of stipend payments) is also 
available to support training, work placements, and other development costs. 
Students with EU residency are eligible for a fees-only studentship award. 
International applicants are normally not eligible to apply for this 
studentship. The Gallery will provide up to £1000 a year to cover travel and 
other costs incurred travelling to undertake research at the Gallery or other 
locations. Both partners and the Collaborative Doctoral Partner consortium will 
provide opportunities for training and career development.

The closing date for applications is 12:00 noon (UK time) on 13th March 2017.

For informal enquiries, please contact the main supervisors Professor Haida 
Liang ([email protected]<mailto:[email protected]>) or Dr Catherine 
Higgitt 
([email protected]<mailto:[email protected]>).
 Application is by covering letter, CV and online application form, and should 
be sent to [email protected]<mailto:[email protected]> and copied 
to [email protected]<mailto:[email protected]>.
Application packs can be obtained from 
http://www4.ntu.ac.uk/research/ntu_doctoral_school/studentships/index.html





Dr Catherine Higgitt

Principal Scientific Officer
Scientific Department
National Gallery
Trafalgar Square
London
WC2N 5DN
e. [email protected]<mailto:[email protected]>
[The National   Gallery, Trafalgar Square, London WC2N 
5DN]<http://www.nationalgallery.org.uk>
[Australia’s Impressionists 
exhibition]<http://www.nationalgallery.org.uk/whats-on/exhibitions/australias-impressionists>
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