Louis-Alphonse Poitevin

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Louis-Alphonse Poitevin (born August 30, 1819 in Saint-Calais , † March 5, 1882 in Conflans-sur-Anille ) was a French photography pioneer .

Alphonse Poitevin ( Bulletin de la Société française de photographie , 1883)

Poitevin studied from 1843 École Centrale in Paris and was then a state engineer in the salt pans of Dieuze, Montmoret and Gouhènans and director of the glass factory of Ahun-les-mines and Follenbray.

In 1855 he invented the Collotypie , the precursor of the light pressure , to Joseph Albert in 1867 perfected. This was also the basis of rubber printing and pigment printing (carbon printing), which quickly became popular and is still practiced today by photographers and artists (see fine printing process ). The basis was a gelatin layer with potassium or ammonium dichromate. Poitevin himself made carbon prints, from 1861 also with silver chloride paper soaked with chromic acid.

literature

  • Entry Alphonse Louis Poitevin in Winfried Pötsch, Annelore Fischer, Wolfgang Müller: Lexicon of important chemists, Harri Deutsch 1989
  • A. Potevin † in Photographische Korrespondenz , 19th year 1882, pp. 94–95
  • Poitevin: Traité des Impressions photographiques sans sels d'Argent, 1862

Web links

Commons : Alphonse Poitevin  - collection of images, videos and audio files
Wikisource: Photographic Correspondence  - Sources and Full Texts