Gabriel Lippmann
In practice, the Lippmann process was not easy to use. Higher resolution needed smaller grains. Smaller grains were less affected by light so they needed to be exposed to the light for a longer amount of time.  With a lens with a large opening and a very brightly sunlit subject, a camera exposure of less than one minute were rare. Exposures measured in minutes were normal. Pure colors photographed well, but the colors of real-world objects could be a problem to photograph. The process could not make color prints on paper. It was not possible to make a good copy of a Lippmann color photograph by rephotographing it.  The requirements needed to see the colors to best effect meant the photographs could not be used for casual use.