Patent ID: 6461544
Filing Date: 2002-10-08
Classification: B42D,B44F,G03H,Y10S

Abstract:
A method of making a graphic material, comprising the steps of:making a shim that has a microgroove pattern for forming a negative impression of a hologram and a non-holographic diffraction grating by growing a holographic microgroove pattern from a first microtexture interference pattern: and by growing a diffraction microgroove pattern from a second microtexture interference pattern; making an embossable blank having the negative image of the hologram and the diffraction grating by (i) impressing the shim holographic microgroove pattern into a first area of the embossable blank with a die; (ii) repositioning the die; (iii) and impressing the shim diffraction microgroove pattern into a second area of the embossable blank that is co-planer with the first area; forming a mater plate, having an image of the hologram and the diffraction grating, from the embossable blank by growing the master plate from the embossable blank with electroplating; forming the hologram over a first area of said graphic material by embossing the graphic material with the master plate; forming the non-holographic diffraction grating over a second area of said graphic material, separate from, but co-planar with said first area, said steps of forming said hologram and forming said diffraction grating occurring simultaneously via the microembossing of a single surface of the graphic material.