Abstract: The present invention relates to printable security paper that includes a region capable of receiving printed indicia on the front side and on the reverse side which are observable in reflected light and form an image observable in transmitted light, as security element protecting against two-sided copying, characterized in that such region is a screened region having an average overall opacity less than the opacity of the vellum part of the rest of the paper, said screened region being made up from alternations of vellum miniregions, having an approximately constant thickness equal to that of the vellum part of the rest of the paper, and of miniregions of reduced opacity because of their smaller thickness compared with the vellum miniregions. The invention also relates to the security document obtained with this paper.
Abstract: The invention concerns a security document comprising, as security element against recto/verso copying, indicia present on both sides and capable of being viewed under reflected lighting and forming an image capable of being viewed under transmitted light. The invention is characterized in that said indicia comprise lines and form said image with 3D effect.
Abstract: This invention relates to a silver halide photographic element containing a phenolic infrared dye-forming coupler bearing in the 2-position either a benzamido group substituted with a sulfonyl group or a heterocyclic carbonamido group, and bearing in the 5-position a non-carbonamido group, which element is useful for incorporating and recovering metadata, such as sound data, into a photographic image and is specifically concerned with the incorporation of non-visually perceptible sound information into a photograph.
Abstract: A method for manufacturing a black matrix of a plasma display panel includes the steps of forming transparent electrodes of upper electrode patterns and black matrix patterns on an upper substrate, and depositing a predetermined metal material on the transparent electrodes of the black matrix patterns. In the method for manufacturing a black matrix of a plasma display panel, it is possible to manufacture the black matrix without performing a separate baking process. In addition, since it is possible to pattern the upper electrode and the black matrix at the same time, the manufacturing process steps are simplified and the manufacturing cost is saved.
Abstract: Growth and clustering of halftone dots is a drawback in the reproduction of halftoned continuous tone images on prior art recording materials. Certain thermographic materials show a local microdot shrink effect called negative cross-talk upon neighboring microdots when exposing a microdot. Exposing these materials according to the frequency modulated halftone data of an image results in better tone rendering and lower noise due to lower dot clustering or negative cross-talk characteristics.
October 9, 1998
Date of Patent:
April 23, 2002
Bart Horsten, Paul Delabastita, Jacobus Bosschaerts, Luc Schellekens
Abstract: A color photographic element includes a support, a silver halide emulsion layer, and associated therewith a phenolic dye-forming coupler having the formula ##STR1## wherein R.sup.1 represents hydrogen, a straight or branched chain alkyl group having 1 to about 20 carbon atoms, a cycloalkyl group having about 3 to 8 carbon atoms in the ring, or an aryl group having 6 to about 20 carbon atoms;R.sup.2 represents hydrogen or a substituent;R.sup.3 represents hydrogen, halogen, or alkyl, cycloalkyl or aryl groups as defined for R.sup.1 ;R.sup.4 represents a fluorosubstituted alkyl group having 1 to about 20 carbon atoms, a fluorosubstituted cycloalkyl group having about 3 to 8 carbon atoms, or a fluorosubstituted aryl group having 6 to about 20 carbon atoms;R.sup.5 represents hydrogen or a substituent; X represents hydrogen or a coupling-off group; Z represents carbon atoms or hetero atoms necessary to complete a 5-,6-, or 7-membered ring; m is 0 to 3; and n is 0 to 4.
Abstract: The present invention pertains to a new type of continuous-tone, photographic print comprising a continuous-tone, photographic relief on a substrate, filled with translucent glaze in such a manner that the thickness of said glaze is determined at any given location on the surface of the substrate by the depth of said relief at that location, and the thickness of said glaze determines the optical density of said print at that same location. Hence, it provides a type of continuous-tone, photographic print that can be formed on the surface of any suitable material, that is intrinsic to the surface of said material and as durable and as colorfast as the materials of which it is formed.
Abstract: A method for generating a screened reproduction of a contone image comprises the steps of screening the contone image to obtain screened data representative for tones of the contone image and suitable for driving exposure of microdots on a radiation sensitive imaging element; exposing the microdots according to the screened data by at least one set or plurality (p) of radiation beams (b), characterized in that at a point in time (t) at least two radiation beams of the set of radiation beams impinge on a particular microdot (m) of a scanline (l). In particular is described a method for making a lithographic printing plate comprising the abovementioned steps.
March 6, 1997
Date of Patent:
July 21, 1998
Jacobus Bosschaerts, Robert Overmeer, Paul Delabastita, Johan Van Hunsel
Abstract: A positive working radiation sensitive plate is image-wise exposed, developed and desensitized, and dried. Thereafter an oleophilic composition including a solvent capable of softening the image is applied to the plate and the plate is then washed to remove the oleophilic composition from the non-image areas. The image accepts ink readily even when the image-wise exposure is effected using a continuous tone original in the absence of a half-tone screen.