Limited edition prints for Artists: Embossed holograms made from silver halide masters

Dr. David Pizzanelli
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This paper details the process used commercially for several years to make embossed holograms using silver halide emulsion plates as surface-relief masters. The principal benefit of using silver-halide materials, rather than photo-resist plates, is the speed of the emulsions, as they require just a few seconds of exposure, rather than several minutes. The second benefit of using silver-halide materials is their sensitivity to laser wavelengths in the visible spectrum, rather than the near-UV end of the spectrum, as is required for photo-resist plates. The sensitivity of silver-halide materials to red light means that relatively inexpensive Helium-Neon lasers may be used to make the holograms. The process would be ideal for artists who want to make a limited edition of their holograms as nickel shims, or larger editions where the hologram is embossed into plastic materials. Keywords: Embossed Hologram, Silver-halide Hologram, Holographic Artist, Limited Edition Hologram.