Teresa M. Russo
In the early 1980s the Metropolitan Museum of Art in New York began the systematic examination of underdrawings in Northern Renaissance paintings in their collections using infrared reflectography. In an effort to improve the quality of underdrawing documents and facilitate their creation, the Metropolitan Museum and the National Gallery of Art in Washington collaborated with Amparo Corporation of Santa Fe, New Mexico, in the development of Mosart, a digital image processor that produces infrared reflectogram assemblies. This paper describes, from a user's point of view, how infrared reflectography and Mosart are used to document underdrawings.