Technical Bulletin 24

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 24 of the Technical Bulletin contains the following essays:  

  
• Seurat’s Painting Technique: Theory, Practice, and Development
  
• Giulio Romano’s Birth of Jupiter: Studio Practice and Reputation
  
• The Two Tax Gatherers by Marinus van Reymerswaele: Original and Replica
  
• The Triptych of Saint Catherine and the Philosophers Attributed to Goossen van der Weyden in Southampton City Art Gallery
  
• “Black Earths”: A Study of Unusual Black and Dark Grey Pigments Used by Artists in the Sixteenth Century
  
• Fading and Color Change of Prussian Blue: Methods of Manufacture and the Influence of Extenders
  
• Pigment-Medium Interactions in Oil Paint Films Containing Red Lead or Lead-Tin Yellow
  

Ashok Roy is Director of Science at the National Gallery.