Edith Weyde

[1] She developed the silver salt Diffusion transfer—"Copyrapid"—which paved the way for the first photocopiers and instant photography.

[1] Then, she worked for four years as a laboratory assistant for the Verein für chemische und metallurgische Produktion.

[1] Four years later, she finished her doctorate with Robert Luther at the Photographic Institute of the Technical University of Dresden.

[1] She was involved in the development of the first Agfacolor papers from 1937 and contributed to the success of early color photography.

[1][3] Weyde developed the silver salt Diffusion transfer method—also called "Copyrapid"—which was a process for the accelerated production of a photographic positive image according to an original.