Ronald R. Martin

Retrieving Tarnished Daguerreotype Content Using X-ray Fluorescence Imaging—Recent Observations on the Effect of Chemical and Electrochemical Cleaning Methods

Alison Stark, Fraser P. Filice, James J. Noël, Ronald R. Martin et autres

We report a study on the effect of chemical and electrochemical cleaning of tarnished daguerreotypes observed using X-ray fluorescence (XRF) microscopy with a micro-focussed X-ray beam from a synchrotron source. It has been found that, while both techniques result in some success …

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Bromine, a possible marine diet indicator? A hypothesis revisited

Madalena S. Kozachuk, Tsun‐Kong Sham, Ronald R. Martin, Andrew J. Nelson

This study examines the hypothesis that bromine in human skeletal tissue serves as an indicator of marine diet. Synchrotron‐based X‐ray fluorescence microscopy of samples from archaeological sites on the Peruvian North Coast showed relative enrichment of bromine in the cementum and osteons. …

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Eyeing the past: synchrotron µ-XANES and XRF imaging of tarnish distribution on 19th century daguerreotypes

Madalena S. Kozachuk, Tsun‐Kong Sham, Ronald R. Martin, Andrew J. Nelson et autres

Louis-Jacques-Mandé Daguerre introduced the first successful photographic process, the daguerreotype, in 1839. Tarnished regions on daguerreotypes supplied by the National Gallery of Canada were examined using scanning electron microscopy energy-dispersive X-ray spectroscopy and synchrotron-radiation analysis. Synchrotron X-ray fluorescence imaging visualized the distribution …

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Recovering Past Reflections: X-ray Fluorescence Imaging of Electrocleaned 19th Century Daguerreotypes

Madalena S. Kozachuk, Tsun‐Kong Sham, Ronald R. Martin, Andrew J. Nelson et autres

The first commercially viable photographic image, the daguerreotype, captured images for a span of approximately 20 years (1839–1860). DeDterioration now disfigures many of these valuable images. One proposed restoration method is an electrochemical process. However, its safety and effectiveness are still under …

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Technology for Technology’s Sake: The Technical Study of Gothic Miniature Boxwood Carvings in the Thomson Collection at the Art Gallery of Ontario

Lisa Ellis, Alexandra Suda, Ronald R. Martin, Elizabeth A. Moffatt et autres

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Franklin expedition lead exposure: New insights from high resolution confocal x-ray fluorescence imaging of skeletal microstructure

Treena Swanston, Tamara L. Varney, Madalena S. Kozachuk, Sanjukta Choudhury et autres

In the summer of 1845, under the command of Sir John Franklin, 128 officers and men aboard Royal Navy ships HMS Erebus and HMS Terror sailed into Lancaster Sound and entered the waters of Arctic North America. The goal of this expedition …

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Author Correction: Recovery of Degraded-Beyond-Recognition 19th Century Daguerreotypes with Rapid High Dynamic Range Elemental X-ray Fluorescence Imaging of Mercury L Emission

Madalena S. Kozachuk, Tsun‐Kong Sham, Ronald R. Martin, Andrew J. Nelson et autres

A correction to this article has been published and is linked from the HTML and PDF versions of this paper. The error has not been fixed in the paper.

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Synchrotron Radiation Analysis of 19th Century Daguerreotypes

Madalena S. Kozachuk, Tsun‐Kong Sham, I. Coulthard, Ronald R. Martin et autres

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Recovery of Degraded-Beyond-Recognition 19th Century Daguerreotypes with Rapid High Dynamic Range Elemental X-ray Fluorescence Imaging of Mercury L Emission

Madalena S. Kozachuk, Tsun‐Kong Sham, Ronald R. Martin, Andrew J. Nelson et autres

Abstract A daguerreotype image, the first commercialized photographic process, is composed of silver-mercury, and often silver-mercury-gold amalgam particles on the surface of a silver-coated copper plate. Specular and diffuse reflectance of light from these image particles produces the range of gray tones …

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Imaging the Surface of a Hand-Colored 19th Century Daguerreotype

Madalena S. Kozachuk, María Olivia Avilés, Ronald R. Martin, Brianne Potts et autres

Daguerreotypes are valued artifacts that constitute a unique historical photographic memory of the 19th century. Understanding their surface chemistry is important in order to conserve and, when necessary, to restore them. Colored highlights were often added by hand to emphasize different features …

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Exploring tarnished daguerreotypes with synchrotron light: XRF and μ-XANES analysis

Madalena S. Kozachuk, Tsun‐Kong Sham, Ronald R. Martin, Andrew J. Nelson et autres

Abstract We report on the elemental and chemical characterization of tarnish on a historic daguerreotype plate. Scanning electron microscopy (SEM) and energy dispersive X-ray (EDX) spectroscopy reveal the presence of C, O, Na, K, P, Cl, Hg, Ag, Cu, S and Au. …

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The application of XANES for the examination of silver, gold, mercury, and sulfur on the daguerreotype surface

Madalena S. Kozachuk, Ronald R. Martin, Tsun‐Kong Sham, M. Robinson et autres

X-ray absorption near edge structure (XANES) spectroscopy was used to study a freshly prepared reference daguerreotype surface as the first step in devising improved methods for the conservation of these important historic artifacts. The results are consistent with the formation of alloy …

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