Facture Volume 1: Renaissance Masterworks

Jan van Eyck, The Annunciation, c. 1434–1436, oil on panel transferred to canvas, National Gallery of Art, Andrew W. Mellon Collection. Details of the Virgin's robe: (left) after cleaning, with paint losses inpainted but before compensating for the missing blue glaze; (center) infrared reflectogram used to guide final recreation of the glaze (images collected with a Kodak platinum silicide camera configured to 1500–2000 nm); (right) after treatment, with the missing blue glaze recreated in reversible materials.

South Netherlandish, The Triumph of Christ ("The Mazarin Tapestry"), c. 1500, wool, silk, gilt-foil-wrapped silk yarn, National Gallery of Art, Widener Collection. Detail, trio of pages: false-color image obtained from the hyperspectral image cube. Spectral differences based on different secondary protein structures are reflected in the false-color image, where white areas correspond to silk fibers, purple areas correspond to wool fibers, and green areas correspond to metal threads.

Giorgio Vasari with drawings by Filippino Lippi and Sandro Botticelli, Page from Libro de' Disegni (recto), drawings probably 1480–1504, mounting and framework by Vasari after 1524, album page with four drawings in various media with decoration in pen and brown ink, brown wash, over black chalk, National Gallery of Art, Woodner Collection, Patrons' Permanent Fund. Detail, Filippino Lippi, Various Figure Studies, c. 1493/1495. Filippino's drawing is depicted in color and Vasari's framing in gray scale.