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Counterfeit Deterrent Features for the Next-Generation Currency Design (1993) / Chapter Skim
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Glossary
Pages 125-128

The Chapter Skim interface presents what we've algorithmically identified as the most significant single chunk of text within every page in the chapter.
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From page 125...
... When diffraction occurs from periodic structures, it produces color by interference, as in the colors produced by a diffraction grating. dpi dots per inch Electrophotography An electrostatic image-forming process in which light, x-rays, or gamma rays form an electrostatic image on a pre-charged, photoconductive, insulating medium.
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From page 126...
... Infrared Inks Inks containing dyes or pigments that absorb in the region 700 to 1,OOO ,um. Ink-let Printing A non-impact priting technique that uses electrostatic acceleration and deflection of ink particles emerging from nozzle to form characters on plain paper.
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From page 127...
... Photochromic Inks Inks containing dyes or pigments that change color when exposed to ultraviolet or very intense visible light. They s bsequently revert to their original color.
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From page 128...
... A typed "Void Patterns." Void Pattern | A security device consisting of a p riod structure as an overt but not visible feature. When copied on a machine with a different periodicity, the resulting moire pattern displays the word "VOID" or some other message.
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Key Terms

  • security feature
  • electromagnetic energy
  • energy beyond
  • identifiable reactions
  • interference filters

  • visible feature
  • visible spectrum
  • diffraction grating
  • viewing angle
  • containing dyes

  • security features
  • inks containing
  • variable inks
  • raised surfaces
  • periodic structures

  • plastic particles
  • special instruments
  • fine powder
  • ink contains
  • security device

  • colored wax
  • press printing
  • roller applies
  • change color
  • flying spot

  • image fixed
  • diffractive optical
  • powder called
  • slow luminescence
  • device consisting


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