Chronology of events in the history of photography in the Czech lands till 1918.

Karel Schinzel and his patent for color photography

Karel Schinzel introduced two principles of color photography in the Austrian patent No. 42 478, which he worked on: a principle of a three-layered material (used later), and the idea of getting a picture by hydrogen peroxide bleaching from three pigments in three sensitive layers (used later with other oxidizing reagents used in cibachrome).