In some cases, underdrawing can be clearly visualized using infrared reflectography because carbon black pigments absorb infrared light, whereas opaque pigments such as lead white are transparent with infrared light.
12.
Infrared reflectography has revealed the many changes he made to the composition during this time, including the removal of a fourth boy near the mast and a second schooner in the distance.
13.
As a specialist in reflectography and infra-red techniques, he pioneered the restoration of the works of Leonardo da Vinci and was able to use the latest technology to uncover The Adoration of the Magi.
14.
The images hidden beneath the paint, uncovered in full detail by infrared reflectography, show figures constructing a staircase, transforming the scene from one of a world in ruins to one in reconstruction at the beginning of the Renaissance.
15.
"Thanks to infrared reflectography, " she said, " we've been able to read the newspaper page Schwitters painted on and it says so much about him in the last years of his life when he was ill.
16.
In a small dark room that looked more like a radiology lab than an art museum, filled as it was with cameras and computer terminals, Heather Galloway, a conservation intern, explained how infrared reflectography was used during the run of the show.
17.
:" Many of the questions about the unity with the Father portrait could be clarified by the infrared reflectography investigation of the Florentine portraits 2012 : As a result of a fundamental change of approach in the development process of the father portrait needs this, contrary to previous assumptions that have been done before the image of the mother ."
18.
Infrared reflectography of the underdrawings for the " Last Judgment " panels show letters used to denote the final colour to be applied, for example " g " for " gelb " ( yellow ) or " w " for " weiss " ( white ), and there are few deviations in the finished work.
19.
After studying in The Netherlands, earning a doctorate at Harvard and joining the National Gallery on a fellowship in 1973, he had plumbed Vermeer's mastery of perspective and his evident use of the camera obscura, a light-box and forerunner of the camera, and subjected virtually all the artist's works to infrared reflectography to expose revealing alterations and underpaintings.
