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Infrared Reflectography

Examination of paintings by infrared radiation often reveals changes in composition, damages, fillings and retouches. Its most frequent use is in the detection of underdrawing executed with carbon pigments. Thin paint layers, opaque to visible light, are often partially transparent to radiation in the 700 nm to 2,000 nm range. White gesso, and to a lesser extent other light-coloured grounds, reflect infrared rays, but where there is drawing reflectance is reduced. This phenomenon can show the carbon-based under-drawing beneath paint layers. This can be extremely informative about the history and construction of the painting. We have equipment that will capture infrared in the region of 1,000-1,300nm & 1,700-2,000nm. We are currently developing a new infrared mosaicing system and the website will be updated with this information.

 

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Internships in the Conservation of Easel paintings

Nov 05, 2019

Two internships available to begin in September 2020

Conservation students help deliver teacher enrichment

May 07, 2019

HKI students talked to teachers about how they reconstructed a 15th century painting as part of a successful CPD day.

HKI in film to promote interest in museum collections

Jan 29, 2019

Staff and students star in a short film made by the Colnaghi Foundation in collaboration with the Wallace Collection to give the public an insight into what lies behind museum collections.

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