Secure identification documents
View Patent ↗Improvements that prevent tampering of images on identification documents for example identity cards, credit cards and the like, and passports. The document includes a full color image of a person, and a second, full, achromatic image of the person formed underneath and spaced from the color image and in congruence therewith using a laser. The second full image is not visible underneath the first full image during normal viewing of the document, and is only visible upon removal of all or a portion of the first full image. As a result, the document and the image have no outwardly apparent visual difference to the document holder or to a would-be counterfeiter. This provides a covert security feature that is not known or seen until the document is attacked by removing the first full image.
1. An identification document comprising a first, full, color printed image of a person, and a second, full image of the person is disposed underneath and spaced from the first, full image and in congruence therewith; the second, full image being an achromatic laser engraved image, wherein the second image is not visible underneath the first image during viewing of the document with an unaided eye, and the second image is only visible upon removal of all or a portion of the first image.
2. The identification document of claim 1 , wherein the document is an identity card, financial card, a driver's license, or a passport.
3. The identification document of claim 1 , wherein the second image is a gray scale image.
4. The identification document of claim 1 , wherein the second image is applied with 50% opacity settings on the laser.
5. The identification document of claim 1 , wherein the first, color printed image is a dye diffusion or pigment based printed image.
6. A method of forming an identification document containing a first, full, color printed image of a person, the method comprising:
forming a second, full, achromatic image of the person underneath and spaced from the first, full image and in congruence therewith using a laser so that the second image is not visible underneath the first image during viewing of the document with an unaided eye and the second image is only visible upon removal of all or a portion of the first image.
7. The method of claim 6 , wherein the document is an identity card, a financial card, a driver's license, or a passport.
8. The method of claim 6 , wherein the second image is a gray scale image.
9. The method of claim 6 , wherein the second, achromatic image is applied with 50% opacity settings on the laser.
10. The method of claim 6 , wherein the first image is applied by dye diffusion or pigment based printing, and the printing is direct printing or retransfer printing.
11. The method of claim 6 , wherein the second, achromatic image is applied after the first image is applied.
12. The method of claim 6 , further comprising using the same image file to form the first, color printed image and the second, achromatic image.
13. The method of claim 6 , further comprising blurring the border of the first image and the second image.