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Method and apparatus for visually inspecting a substrate on a printing press

  • US 20040188644A1
  • Filed: 04/09/2004
  • Published: 09/30/2004
  • Est. Priority Date: 09/17/2002
  • Status: Abandoned Application
First Claim
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1. A method of visually inspecting a substrate of a printing press, the method comprising:

  • providing an image recording device including a monochromatic sensor configured to record images printed on a white substrate, the images including yellow ink; and

    illuminating the substrate with white light and blue light;

    wherein illuminating the white substrate with blue light highlights the yellow ink against the white substrate.

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