Abstract
ABSTRACT The Harrison D. Horblit Collection of Early Photography at Houghton Library, Harvard University contains 370 paper negatives, presenting an opportunity to study this nineteenth century technique in depth. In a pilot study on the composition and light stability of paper negatives by the French artist Frédéric Flachéron (1813–1883), nine paper negatives were analyzed with X-ray fluorescence analysis and three with microfade testing to ascertain if there was a correlation between the presence of halides and the light stability of the negatives. Technical analysis identified iodine and bromine in the negatives and indicated variability in Flachéron’s stabilization and fixing methods not previously documented.
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