Title:
LASER ENGRAVING METHODS AND COMPOSITIONS
Document Type and Number:
WIPO Patent Application WO2003055684
Kind Code:
A3
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, or Copper Iodide, and a second quantity at least one substance selected from the group consisting of zinc sulfide, barium sulfide, alkyl sulfonate, and thioester. The composition can be engraved with grayscale images (70, 72) by an Nd:Yag laser and can be added to laminates (52) or coatings. The composition can be used during the manufacture of many articles of manufacture, including identification documents (10).
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Inventors:
LABREC BRIAN (US)
JONES ROBERT (US)
JONES ROBERT (US)
Application Number:
PCT/US2002/040906
Publication Date:
May 06, 2005
Filing Date:
December 20, 2002
Export Citation:
Assignee:
DIGIMARC ID SYSTEMS LLC (US)
LABREC BRIAN (US)
JONES ROBERT (US)
LABREC BRIAN (US)
JONES ROBERT (US)
International Classes:
B23K26/00; B32B9/04; B41M3/14; B41M5/24; B42D15/10; C08K3/16; C08K3/30; G03C1/00; G03C1/492; G03C1/494; G03C1/76; G06K5/00; G06K19/02; H01C13/00; B41M5/26; B41C; (IPC1-7): G06K19/02
Foreign References:
| US3860558A | 1975-01-14 | |||
| US6066594A | 2000-05-23 | |||
| US6752432B1 | 2004-06-22 |
Other References:
See also references of EP 1550077A4
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