National Gallery Technical Bulletin Volume 33 - National Gallery London Author:Ashok Roy The acclaimed National Gallery Technical Bulletin features contributions by curators, scientists, and conservators, on materials and techniques of painting, and the scientific examination of paintings. Volume 33 presents new findings on the use of colorless powdered glass in 15th- and 16th-century European paintings; the conservation and restora... more »tion of Niccolò di Pietro Gerini's Baptism Altarpiece; an examination of Renoir's The Umbrellas; the techniques of Adolphe Monticelli; and a comprehensive study of Vuillard's La Terrasse à Vasouy.« less