Systems, compositions, and methods for full color laser engraving of ID documents
First Claim
1. A method of producing an identification document comprising the steps of:
- providing at least a first color dye in a document layer, the first color dye experiencing a transformation upon excitation;
providing at least a first sensitive dye in proximity of the first color dye;
exciting the first sensitive dye with a laser to excite the first color dye.
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Accused Products
Abstract
In one embodiment, the invention provides a method for forming a full color laser engraved image on an ID card. As described below, a special image capable layer is prepared that is addressable by one or more near infrared (NIR) lasers. Each type of particle contained within the image capable layer is associated with a particular color (e.g., cyan, magenta, or yellow) and is responsive (i.e., can selectively absorb) a particular wavelength of laser energy to form a laser engraved pixel in that respective color. In one embodiment, the particles are selected such that the wavelengths that they respond to do not overlap significantly. By providing discrete physical particles and preventing a given particle from responding to more than one laser wavelength, it can be possible to minimize so-called “cross talk” between the cyan, magenta, and yellow centers and minimize contamination and/or chemical mixing of image formers. This helps to ensure image accuracy and quality.
117 Citations
7 Claims
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1. A method of producing an identification document comprising the steps of:
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providing at least a first color dye in a document layer, the first color dye experiencing a transformation upon excitation;
providing at least a first sensitive dye in proximity of the first color dye;
exciting the first sensitive dye with a laser to excite the first color dye. - View Dependent Claims (2, 3, 4, 5)
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6. An identification document comprising
a core adhesively bound to, an imaging layer comprising a mixture including a first color dye, the first color dye experiencing a transformation upon excitation, and a first sensitive dye, wherein exciting the first sensitive dye with a laser excites the first color dye.
Specification