DIRECTORY_1997#1598 new approved FotoMuseum Provincie Antwerpen conventionDeclaration ISAAR(CPF): Internationale norm voor archivistische geautoriseerde beschrijvingen van organisaties, personen en families, Antwerpen/Leuven/Amsterdam 2006. detailLevel http://ica-atom.org/doc/RS-2#5.4 created January 2, 2015 9:52:48 AM CET human revised June 27, 2022 12:48:14 PM CEST human Person (Male) person Esselens, Prosper conventionDeclaration Connected conventionDeclaration Brussels, 1816 - ?, ? 1863 - 1871 Bruxelles

<b>1863 - 1871 Bruxelles</b> Prosper Joseph Antoine, ° 2.4.1816. Chemist; active socialist and republican. Collaborator of the "Bulletin Belge de Photographie", 1863-1871. Patent of 31.12.1864 for improvements in the production of photographic prints [use of gold chloride for developing]. "The [specimens] are produced, it is said, by means of a salt of iron, and gold and platinum....The process is probably based upon the Chrysotype process of Sir John Herschell [sic]. The prints we have received are described as the imperfect results of a first trial...and they are, moreover, reproductions, which are not the most favourable for affording a fair estimate of a process" ("Another Permanent Printing Process", Photographic News, 3.2.1865, p. 53).