Abstract: The hologram recording mechanism in the dichromated gelatin layers are discussed. A new technologies are described for red rainbow hologram recording in the photographic emulsion and selfdeveloped dichromated gelatin - glycerol layers. A new method is suggested and experimentally approbated for relief plastic replica of the rainbow hologram fabrication based on the tanning developed or bleached photographic emulsion. This method is modification of the old photographic `bromoil' process. Some aspects of the noncoherent hologram coping on the dichromated gelatin films are discussed too.!8
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