Momme Andresen

Momme Andresen (, ; 17 October 1857 – 12 January 1951) was a Danish-German industrial research chemist. His main area of work was to formulate better developers and fixers for black-and-white photographs.

Biography Andresen attended a Volksschule (a local state school) in Niebüll, Schleswig-Holstein, near his birthplace. He studied chemistry at the Technische Hochschule Dresden under Rudolf Schmitt. After doctoral studies at the University of Jena, he returned to Dresden to work as Schmitt's assistant.

His first independent scientific work was to determine the structure of the dyestuff safranin, for the German chemical company Cassella. Around that time, he also discovered "Andresen's acid". AGFA commercialised the formulation under the trade name Rodinal.

In 1892. he turned his attention to dry plate (gelatin process) photography. That process had been invented in 1871, and commercialised in 1879. It had problems; including inconsistent results and halation (German: Lichthof). In 1895, he had a part in devising improvements to the process which led to AGFA commercialising a product in 1898 which both gave better results and was quicker to develop than anything used before. It was especially useful in X-ray photography.

Publications .

Das latente Lichtbild, seine Entstehung und Entwicklung. Knapp, Halle (1913) Über lichthoffreie und farbenempfindliche Platten. Agfa, Berlin (1916) Über photographische Entwickler. Agfa, Berlin (undated) Über photographische Hilfsmittel im Negativ- und Positiv-Prozess. Agfa, Berlin (undated) Winke für die Blitzlicht-Photographie. Agfa, Berlin (undated) Agfa Photo-Handbuch. I. G. Farbenindustrie AG, Berlin (1930)