A carbon print uses pigmented gelatin as opposed to silver/metallic particles or chromogenic dyes. This type of print was developed in the mid 19th century due to people's displeasure with silver based black and white prints that seemed to fade quickly. Scientist Alphonse Poitevin invented the process in 1855 and was later altered by Louis Arthur Ducos du Haron so that it could also be used with color. Carbon prints are very high quality and resist this previously seen fading as well as other common deterioration.
Albuman Print
Invented by Louis Desire Blanquart-Evrard in 1850, an Albuman print was the first commericially accepted way to print a photo from a negative. Albuman is found in egg whites and was used to bind the chemicals together on the paper and helped create clear, beautiful positives. Between the years of 1860 and 1890, Albuman prints were clearly the most popular form of photographic prints.
-Cam
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