Method for producing an image on a substrate having the same spe

Details Method for producing an image on a substrate having the same spe Method for producing an image on a substrate having the same spe

1990-06-20

1992-09-01

Fuller, Benjamin R.

Recorders

Performance of multiple functions of steam and gas engines

Pressure responsive element

40443, 346 17, B41J 2005, B41J 2919

Patent

active

051443287

ABSTRACT:
A method for producing a large scale color graphic that presents substantially the same spectral content to a viewer when the graphic is illuminated with front or back lighting includes applying an ink film on a first surface and a second ink film on a second surface wherein the ink film creates the desired colored graphic image and which images produced are in registry with one another. A light source located on the same side as an observer viewing the image passes light through the ink film in one direction and is reflected back through the ink in a substantially opposite direction so that light reaching the observer passes through the equivalent of two ink film thicknesses. A light source located in back of the image so that the image is between the light source and an observer passes light through the first and second ink film layers in a direction toward the observer so that the observer views light having a spectral content that passes through the equivalent of two ink film thicknesses and replicates the spectral content of light from a light source located on the same side as the observer.

REFERENCES:
patent: 3163554 (1964-12-01), Gessler
patent: 4547786 (1985-10-01), Logan et al.
patent: 4666757 (1987-05-01), Helinski
patent: 4811038 (1989-03-01), Gordon et al.
patent: 4889761 (1989-12-01), Titterington et al.

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