Most of the cameras used for infrared reflectography, including the one we employed, are relatively low resolution. As a result, paintings or illuminations must often be recorded in small areas and the images joined together to give a full picture (called an infrared reflectogram mosaic).

Our infrared reflectograms were captured with an InGaAs air-cooled camera with a 640x512 pixels sensor (Photonic Science), equipped with a 50 mm Stingray lens. Illumination was provided by one or two lamps fitted with low voltage 35W SoLux bulbs (colour temperature 4700K, beam-spread 36°). Exposure times were adjusted for each image individually.

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