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Laser engraving methods and compositions, and articles having laser engraving thereon

  • US 7,927,685 B2
  • Filed: 09/14/2004
  • Issued: 04/19/2011
  • Est. Priority Date: 12/24/2001
  • Status: Active Grant
First Claim
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1. An article of manufacture capable of being laser engraved with a grayscale indicium, the article comprising:

  • a host material; and

    an effective amount of a laser enhancing additive material mixed into the host material, the laser enhancing additive comprising;

    a first laser enhancing additive including a first quantity of at least one of copper potassium iodide (CuKI3) or Copper Iodide (CuI); and

    a second laser enhancing additive different from the first laser enhancing additive;

    wherein the laser enhancing additive material is present in an amount from about 0.001 to 0.2 percent by weight based on the total weight of the article; and

    wherein the article comprises a coating or laminate.

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