The freezing of a memory: Tribute to Edith Weyde

Edith Weyde was a German chemist at the Agfa company in Leverkusen who, together with the Belgian engineer André Rott, created the process of transferring images by diffusion or Diffusion Transfer Reversal (DTR), with the aim of automating the photographic process, was one of the bigger advances in silver copying techniques (silver salts). It is the basic process that allowed the instant photography of companies like Polaroid, Kodak or Fuji and even the origin of the direct electrophotographic reproduction system.

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