Carbon Prints
A carbon print, sometimes referred to as a “pigment print,” is a photographic print consisting of pigmented gelatin, rather than using silver suspended in gelatin, as is typical in black-and-white prints, or using chromogenic dyes that are common in photographic colour prints. The carbon process was invented by French chemist, photographer, and civil engineer Alphonse Poitevin in 1855 in response to concerns about the fading of early types of silver-based prints, which was already becoming apparent within just a few years of their introduction. Because the carbon printing process uses pigments instead of dyes, it can produce a far more archivally stable print than any of the other color processes. The carbon process was later adapted by French photography pioneer Louis Arthur Ducos du Hauron in 1868, to allow colour prints to be made using coloured pigments.
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