Art and Design Commons^™

Retrieving Images From Tarnished Daguerreotypes Using X-Ray Fluorescence Imaging With An X-Ray Micro Beam With Tunable Energy, Tsun-Kong Sham, Y. Zou Finfrock, Qunfeng Xiao, Renfei Feng, Sarah Bassnet

Visual Arts Publications

We report recent observations using a synchrotron X-ray micro-beam to retrieve images from tarnished 19th century daguerreotypes. We confirm that high quality image can always be retrieved from tarnished plates using Hg Lα XRF as long as the bulk of the image particles and their distribution remains intact. We also report results from using tunable tender X-rays (2 - 7 keV) to conduct imaging in high vacuum at energy above the Ag L-edge and the Hg M-edge, extracting images using Ag Lα and Hg Mα, respectively among others (e.g., S to track corrosion). Images obtained with the surface sensitive total …