Technical Bulletin 21

The National Gallery Technical Bulletin is a unique record of research carried out at the National Gallery. Drawing on the combined expertise of curators, conservators, and scientists, it brings together a wealth of information about artists' materials, practices, and techniques.

Volume 21 of the Technical Bulletin contains the following essays:  

  
• A Virgin and Child in the Style of Albrecht Dürer. The authors readdress the question of  attribution of this picture in the light of new information on the underdrawing, painting technique, and materials
  
• The technique and materials of the Virgin and Child Enthroned with Saints by Michael Pacher, a fifteenth-century painter and sculptor from the Tyrol
  
• A note on occurrences of the purple pigment fluorite
  
• The discovery and identification of an original varnish on a panel by Carlo Crivelli
  
• The restoration of two panels by Cima from the Wallace Collection, London
  
• Pollutant monitoring at the National Gallery; a review of past and present monitoring of the main pollutants that affect paintings, and the implications for works displayed at the National Gallery
  

Ashok Roy is Director of Science at the National Gallery.