Definition: early color process invented by Professor Gabriel Lippmann (1845-1921). Light first passed through an almost transparent emulsion layer and was then reflected back by a layer of mercury. The interference between reflected and incident light produced a latent image in the emulsion which could be given b&w processing, but when backed with a mirror appeared in color.
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Thursday, March 20, 2008
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The name of the inventor of this process is Lippmann (2 "n's"). The image is developed with black and white chemistry, and the image is recorded as an interference pattern, just like a hologram. However, it does not record 3-D, though it does record full color, since it uses ordinary light, not laser light. It is viewed in reflected light, usually with a thin prism cemented over the emulsion to get rid of the front surface reflection of the light source. It is normally backed with black to improve contrast. No mirror is used. I have made a number of such images.
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