X-radiograph(s) of "Saint John the Baptist and Saint Barbara"

Identification and Creation

Credit Line: Harvard Art Museums/Straus Center for Conservation and Technical Studies, Alan Burroughs Collection of X-Radiographs
Object Number: Straus.8871
Contact: am_straus@harvard.edu
Permissions: The Harvard Art Museums encourage the use of images found on this website for personal, noncommercial use, including educational and scholarly purposes. To request a higher resolution file of this image, please submit an online request.

Description: X-radiograph Operators present: Kate Smith and Cristina Morilla
Duration of radiography session: 3 hours
Total number of exposures: 5
Material Description - oil on wood panel with original battens
Radiation source- Comet tube
Exposure settings-
50 kV
5 mA
120 seconds
178 cm focal distance
Filtration used: none
Screens used: none
Set up/sequencing notes:
Scanning notes: laser power high, PMT 10, 16-bit linear data scale, 50 micron scan resolution
Image manipulation notes: 3 scans converted to tiff and assembled into composite radiograph in Photoshop

Cristina Morilla, Naming Blue Pigments and Colors in Medieval Catalonia: The Case of Lluís Borrassà, Polychrome Art in the Early Modern World,, Routledge (New York, NY, 2025), Pages 38-54, Figure 3.5, Page 47; Figure 3.6, Page 48; Figure 3.7, Page 48