Plaques Autochromes Lumiгёre Here

: Fine black soot filled the tiny spaces between the starch grains to prevent unfiltered light from washing out the image .

: A special orange-yellow filter was required on the camera lens to correct the emulsion's natural over-sensitivity to blue light . Characteristics & Use Remembering Autochrome | Smithsonian Institution Archives plaques autochromes lumiГЁre

: Approximately four million tiny grains of dyed potato starch per square inch were spread onto a glass plate . : Fine black soot filled the tiny spaces