Noun
English Wikipedia has an article on:autochromeWikipedia
autochrome (plural autochromes)
An early photograph produced by means of a glass plate coated on one side with a random mosaic of microscopic dyed grains of potato starch under silver halide emulsion.
Early color photography Autochrome color picture by Jean-Baptiste Tournassoud of North-African soldiers, Oise, France, 1917. Source: Internet
The additive RGB model and variants such as orange–green–violet were also used in the Autochrome Lumière color plates and other screen-plate technologies such as the Joly color screen and the Paget process in the early twentieth century. Source: Internet
Autochrome plates were one of several varieties of additive color screen plates and films marketed between the 1890s and the 1950s. Source: Internet
It first became a widespread commercial reality with the introduction of Autochrome plates in 1907, but the plates were very expensive and not suitable for casual snapshot-taking with hand-held cameras. Source: Internet
They went on to develop the first practical photographic color process, the Lumière Autochrome. Source: Internet
But where this autochrome was found has not been made known. Source: Internet