| Patent Number |
Title Of Patent |
Date Issued |
| 7264670 |
Coloured microstructured effect pigments |
September 4, 2007 |
| Disclosed are colored flake-form effect pigments comprising one or more layers, where at least one of the layers comprises one or more colorants or is itself a colorant and at least one of the layers has a groove or grid structure, and to processes for the preparation thereof, and to the |
| 6218070 |
Process to make ultrahigh contrast images |
April 17, 2001 |
| A process to make ultrahigh contrast photographic negative images is disclosed. In known processes, particularly those using hydrazine compounds, developer solutions to increase contrast contain high concentrations of amino compounds that are volatile, have an annoying, unwholesome o |
| 6150083 |
Photograhic silver halide material and process for preparing silver images |
November 21, 2000 |
| It was found that good sensitizing activity in the red spectral region and without residual stain can be obtained with dyes of the general formula (I) ##STR1## wherein R.sub.1 is an alkyl group having 1 to 6 carbon atoms or a heterocyclic ring, R.sub.2 and R.sub.3 are hydrogen, m |
| 6033825 |
Silver-halide recording material to produce negatives with reduced fog and ultrahardgradation |
March 7, 2000 |
| Photographic silver-halide materials for producing negative images with ultrahard-gradation contrast, which contain a hydrazine compound and a contrast-boosting amino compound and/or phosphonium compound, demonstrate a marked tendency to form "black fog" which results in inadequate a |
| 6030744 |
Silver-halide recording material with improved storage stability to produce negatives with ultra |
February 29, 2000 |
| Photographic silver-halide materials for producing negatives with ultrahard-gradation gamma contrast, which contain a hydrazine compound and a contrast-boosting amino compound and/or phosphonium compound, demonstrate an undesirable increase in fog during storage. By adding a sulphite |
| 5783357 |
Tertiary amino contrast increasers for ultrahigh contrast silver halide recording material |
July 21, 1998 |
| Silver halide recording material for the production of negative images with ultrahigh contrast.Known silver halide recording materials for the production of negative images with ultrahigh contrast contain hydrazine compounds and contrast-increasing compounds (so-called boosters). A mater |
| 5663034 |
Silver halide recording material for making negative images having ultrahigh contrast |
September 2, 1997 |
| Silver halide recording material for making negative images having ultrahigh contrast.Known silver halide recording materials for making negative images having ultrahigh contrast contain hydrazine compounds and contrast enhancing compounds (so-called boosters). The invention involves a m |
| 5637439 |
Photographic silver halide photosensitive material and method for developing the same |
June 10, 1997 |
| Negative images of super-high contrast can be formed by developing an exposed silver halide photographic photosensitive material in the presence of at least one compound selected from the compound of formula (1): ##STR1## wherein R.sup.1, R.sup.2, R.sup.3, R.sup.4, R.sup.5 and R.sup. |
| 5601971 |
Hardening of hydrophilic colloids with imidazolium and triazine combinations |
February 11, 1997 |
| An improved method of hardening a hydrophilic colloid is detailed. The hardening results in a stronger matrix and less water pickup. These and other advantages are obtained by hardening with a combination of at least one hardener chosen from Formula I either alone or in combination with |
| 5416218 |
Aryl hydrazides |
May 16, 1995 |
| Photographic silver halide materials containing aryl hydrazides as defined and novel aryl hydrazides with a cationic group in the acyl radical enables the preparation of photographic materials that can be developed rapidly to ultrahigh contrast at a relatively low pH value. The photo |
| 5407792 |
Photosensitive silver halide recording material with reduced pressure sensitivity |
April 18, 1995 |
| The present invention relates to photosensitive silver halide recording material with reduced pressure sensitivity. The occurrence of pressure marks can be minimized by protective layers with suitable additives. Other properties of the recording material, such as sensitivity, contrast, a |
| 5190847 |
Photographic silver halide materials containing aryl hydrazides |
March 2, 1993 |
| Photographic silver halide materials containing aryl hydrazides as defined and novel aryl hydrazides with a cationic group in the acyl radical enables the preparation of photographic materials that can be developed rapidly to ultrahigh contrast at a relatively low pH value. The photo |
| 5130480 |
Ammonium aryl hydrazide compounds |
July 14, 1992 |
| Photographic silver halide elements containing aryl hydrazides as defined for the production of images with ultrahigh contrast and a new class of aryl hydrazides with a cationic group in the aryl radical as defined. The photographic silver halide elements can be developed at relatively l |
| 5013844 |
Pyridinium aryl hydrazide compounds |
May 7, 1991 |
| Photographic silver halide elements containing aryl hydrazides as defined for the production of images with ultrahigh contrast and a new class of aryl hydrazides with a cationic group in the aryl radical as defined. The photographic silver halide elements can be developed at relatively l |
| 4937160 |
Photographic silver halide elements containing aryl hydrazides |
June 26, 1990 |
| Photographic silver halide elements containing aryl hydrazides as defined for the production of images with ultrahigh contrast and a new class of aryl hydrazides with a cationic group in the aryl radical as defined. The photographic silver halide elements can be developed at relatively l |
