Laser engraving methods and compositions, and articles having laser engraving thereon
First Claim
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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Accused Products
Abstract
The invention provides a composition having laser engraving properties, comprising a host material and an effective amount of a laser enhancing additive. The laser enhancing additive comprises a first quantity of least one of copper potassium iodide (CuKI3) or Copper Iodide (CuI), and a second quantity at least one substance selected from the group consisting of zinc sulfide (ZnS), barium sulfide (BaS), alkyl sulfonate, and thioester. The composition can be engraved with grayscale images by an Nd:Yag laser and can be added to laminates or coatings. The composition can be used during the manufacture of many articles of manufacture, including identification documents.
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Citations
15 Claims
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1. An article of manufacture capable of being laser engraved with a grayscale indicium, the article comprising:
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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. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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Specification