Background
Hinricus Lueppo-Cramer was born in 1871 in Leerbeek, Germany.
Hinricus Lueppo-Cramer was born in 1871 in Leerbeek, Germany.
Hinricus attended the Gymnasium in his hometown, then specialized in chemistry studies at Munich, Heidelberg and Berlin.
Upon finishing his studies in 1884, Lueppo-Cramer joined the Berlin chemical firm of Schering, which he left in 1902 to serve as director of Dr. Schleussner's dry plate factory in Frankfurt am Main, Germany. He held this position until 1918.
Lueppo-Cramer started to work for the Kranseder & Company dry plate factory in Munich, Germany. In 1922 he took charge of the research department of the Deutsche Gelatinefabriken A.G. at Schweinfurt, where he stayed until 1932.
While working at Schering Hinricus invented the intermediate developer Adurol (1899). He continued to study chemical development, contributing greatly to the discovery of new hydroquinone developers. His other experiments concerned such areas as solarization, the Herschel Effect, the Albert Effect, the desensitizing action of most developers (1901), and the desen sitization of emulsions, which permitted development under comparatively bright light (1920). He wrote hundreds of articles and papers and a number of books.