Abstract: An inkjet printing system comprises an inkjet printer responsive to digital signals and containing an ink composition comprising: (a) water, (b) dispersed pigment particles, (c) a humectant, and (d) a polyurethane additive having at least a first soft segment having siloxane groups, the additive having a weight average molecular weight of at least 10,000 daltons and a sufficient number of acid groups to provide an acid number greater than 60. An improved combination of scratch resistance and jetability is obtained.

Abstract: A process for providing an ozone resistant dye-based image, and a resulting image, includes jetting an ink containing the dye onto a microporous media surface to form a dye-based image, and thereafter jetting over at least a portion of the dye-based image a clear ink overcoat comprising a transparent polymeric binder containing dispersed inorganic nano particles, wherein the median equivalent circular diameter of all of the dispersed inorganic particles is in the range of 1 to 500 nm. Color fade due to ozone effects is diminished while maintaining jetability.

Abstract: An inkjet ink composition comprising water, and at least one water-dispersible polyurethane/urea polymer having at least a first soft segment formed from a polyol prepolymer and at least a second soft segment formed from a polyamine prepolymer, wherein the polyol prepolymer forms urethane bonds in the polyurethane/urea and the polyamine prepolymer forms urea bonds in the polyurethane/urea, and further wherein at least about 4% by weight of the combined soft segments is formed by polyamine prepolymers that form urea bonds in the polyurethane/urea polymer.

Abstract: An ink composition comprising: (a) water; (b) a pigment dispersion comprising a pigment and a polymeric dispersant wherein the polymeric dispersant is a copolymer comprising at least a hydrophobic methacrylate or acrylate monomer containing an aliphatic chain having greater than or equal to 12 carbons, and a hydrophilic methacrylic or acrylic acid monomer, wherein the copolymer comprises at least 10% by weight of the methacrylate or acrylate monomer and at least 5% by weight of the methacrylic or acrylic acid monomer, and wherein the copolymer comprises, in total, 20 to 95 weight % of hydrophobic monomer; and (c) at least one water-dispersible polyurethane.

Abstract: An inkjet ink composition comprising water, pigment particles dispersed with a polymeric dispersant, at least one water-dispersible polyurethane, at least one pyrrolidinone compound, glycerol, and a 1,2-alkanediol having from four to eight carbon atoms.

Abstract: An ink composition comprising (a) water, (b) pigment particles, (c) at least one humectant, (d) at least one polyurethane having an average molecular weight of at least about 10,000 and a sufficient number of acid groups to provide an acid number from 60 to about 130, and being present at a weight concentration of greater than 0.7%, and (e) at least one water soluble acrylic polyiner comprising carboxylic acid groups, present at a weight concentration of greater than 0.6%, wherein the acid groups on the polyurethane and acrylic polymers are at least partially neutralized only with a monovalent inorganic base.

Abstract: A water based inkjet ink set with excellent image stability, durability and quality, comprising at least one cyan ink, at least one magenta ink, at least one yellow ink, at least one black ink, and at least one colorless protective ink, wherein: (a) the cyan, magenta, yellow, and black inks each comprise a pigment colorant; (b) the cyan, magenta, yellow, black, and colorless protective inks each comprise a polymeric binder additive; and (c) the surface tensions of the inks have the following relationships: (i) the dynamic surface tension at 10 milliseconds surface age for all inks of the ink set is greater than or equal to 35 mN/m, (ii) the static surface tensions of the yellow ink and of the colorless protective ink are at least 2.0 mN/m lower than the static surface tensions of the cyan, magenta and black inks of the ink set and (iii) the static surface tension of the colorless protective ink is at least 1.0 mN/m lower than the static surface tension of the yellow ink.

Abstract: An ink composition comprising (a) water, (b) pigment particles dispersed with a dispersant or self dispersing without the need for a dispersant, (c) at least one humectant, and (d) at least one polyurethane additive which is distinct from the dispersant, having an average molecular weight of at least about 10,000 and a sufficient number of acid groups to provide an acid number greater than about 60, the polyurethane being present at a level of at least 10 percent by weight relative to the pigment particles and comprising a polyether segment having a molecular weight greater than 250 and less than 2900, wherein the acid groups on the polyurethane are at least partially neutralized only with a monovalent inorganic base.

Abstract: In a method and system for processing a photographic image having lightness values, L*, representing one of the colorimetric values of an original scene, the photographic image is transformed. The transformed image has a gamma as a function of CIE 1976 L*, which includes a dark region having a rising slope, a light region having a falling slope, and a plateau region having a slope constantly within 5 percent of a maximum value in said plateau region. The rising slope is at least twice as large as the absolute value of the falling slope. The plateau region is between 10 L* and 30 L* wide. Gamma is a derivative of visually perceived reproduced CIE 1976 L* versus scene CIE 1976 L*. Gamma has a maximum slope between 1.5 and 2.0.

Abstract: In a method and system for processing a photographic image having lightness values, L*, representing one of the colorimetric values of an original scene, the photographic image is transformed. The transformed image has a gamma as a function of CIE 1976 L*, which includes a dark region having a rising slope, a light region having a falling slope, and a plateau region having a slope constantly within 5 percent of a maximum value in said plateau region. The rising slope is at least twice as large as the absolute value of the falling slope. The plateau region is between 10 L* and 30 L* wide. Gamma is a derivative of visually perceived reproduced CIE 1976 L* versus scene CIE 1976 L*. Gamma has a maximum slope between 1.5 and 2.0.

Abstract: A high bromide {111} tabular grain emulsion is disclosed in which most of the tabular grains exhibit silver salt epitaxy at a single site. Most of the silver halide epitaxy sites contact an edge region of the tabular grains. These emulsions exhibit chemical sensitization by the epitaxy and surprising lower levels of desensitization by spectral sensitizing dyes.

Abstract: A process is disclosed of conducting in a single reaction vessel selective site high chloride epitaxy deposition as a continuation of host high bromide {1111} tabular grain emulsion precipitation. A host tabular grain emulsion is precipitated accounting for 0.05 to 1.5 moles of silver per liter of dispersing medium. Any iodide at the major faces of the tabular grains is uniformly distributed and any iodide in a surface region of the grains amounts to less than 7 mole, based on silver in the surface region. Until epitaxy is formed, pH is held in the range of 3 to 8. Gelatino-peptizer in an amount of 1 to 40 grams per Ag mole is added to the emulsion. Chloride ion in a range of from 0.03 to 0.15 mole per liter is dispersed in the emulsion. pBr is held in the range of from 3.0 to 3.8 until epitaxy is formed. Iodide ion in a concentration of from 5.times.10.sup.-6 to 1.times.10.sup.-4 mole per square meter of grain surface area is uniformly adsorbed to the major surfaces of the tabular grains.

Abstract: A photographic element is disclosed that relies upon high bromide silver halide grains that are sulfur and/or gold sensitized for latent image formation. Coated to receive exposing radiation directly from a layer containing the latent image forming grains is a non-imaging layer containing (a) tabular silver halide grains (i) comprised of greater than 50 mole percent bromide, based on silver, (ii) having a thickness in the range of from 0.03 to 0.20 .mu.m, and (iii) having an average aspect ratio of greater than 20, and (b) silver halide epitaxy selectively positioned adjacent edges of said tabular grains in said non-imaging layer, said silver halide epitaxy (i) containing greater than 50 mole percent chloride, based on silver, and (ii) accounting for from 0.1 to 50 percent of the total silver in the composite grains.

Abstract: A process of preparing a radiation-sensitive silver halide emulsion is disclosed in which the silver halide grains form dispersed clumps. A population of fine silver halide grains is precipitated at higher concentrations than previously taught for preparing this type of an emulsion by employing a peptizer limited in amount, limited in methionine content, or both. Following formation of the grains, they are aggregated into clumps by the addition of a surfactant, optionally assisted by the adding iodide, increasing pH or both. The grain clumps are stabilized against further aggregation by adding a high methionine peptizer and optionally assisted by the precipitation of additional silver halide.

Abstract: A process is disclosed of preparing a photographic emulsion comprised of high bromide silver halide tabular grains accounting for greater than 90 percent of total grain projected area. The grains exhibit a low level of size dispersity by reason of forming in the presence of a dispersing medium containing a polyalkylene oxide block copolymer surfactant a population of silver halide grain nuclei containing twin planes, the halide content of the grain nuclei consisting essentially of silver bromide, and growing the silver halide grain nuclei containing twin planes to form the tabular silver halide grains. Inadvertent variation in tabular grain sizes and thicknesses from one precipitation to the next are minimized by growing the silver halide grain nuclei at a pH in the range of from 3.0 to 8.0 and in the presence of at least a 0.01M concentration of a partially dissociated acid having a pKa that is within 2.

Abstract: The invention is generally accomplished by providing an inverted order film in which the lowermost light sensitive layer is a blue-sensitive layer of blue-sensitized tabular grains. The blue-sensitized tabular grains are preferably sensitized to a wavelength of between 450 and 520 nm.

Abstract: A method of processing an exposed originating silver halide color photographic element comprising developing the photographic element in a color devoloper containing a p-phenylenediamine color developing agent in the presence of a 1-phenyl pyrazolidin-3-one compoundwherein the originating silver halide photographic element comprises a radiation sensitive emulsion in reactive association with a development inhibitor releasing compound and containing a silver halide grain population comprised of grains comprising at least 50 mole percent silver chloride, based on total silver forming the grain population projected area, wherein at least 50 percent of total grain projected area is accounted for by intrinsically stable silver halide tabular grains(1) bounded by {100} major faces having adjacent edge ratios of less than 10 and(2) each having an average aspect ratio of at least 2, and wherein the silver halide content of the photographic element comprises at least 50 mole % silver chloride and no more than 2 mole %

Abstract: The invention is accomplished by providing a combined process of chemical and spectral sensitization comprising providing a silver halide emulsion, adding a sulfur or gold chemical sensitizer, adding a finish modifier ##STR1## wherein X is --O--, --S--, --Se--, ##STR2## Y.sup.1 and Y.sup.2 individually represent hydrogen or an aromatic nucleus or together represent the atoms completing a fused aromatic nucleus; R is hydrogen or lower alkyl of from 1 to 5 carbon atoms; and R.sub.1 is a hydrogen or methyl, provided that Y.sup.1 and Y.sup.2 individually represent hydrogen or an aromatic nucleus when R.sub.1 is hydrogen, adding dye, andadding a hydrolyzable quaternized chalcogenazolium salt of a middle chalcogen,heating to a temperature sufficient to cause sensitization of said silver halide to take place, and cooling to recover the sensitized emulsion.

Abstract: A radiation sensitive emulsion is disclosed that improves the light absorption of high chloride tabular grain emulsions in the longer wavelength half of the blue spectrum. The tabular grains each have a tabular substrate portion containing at least 50 mole percent chloride, based on silver, bounded by {100} major faces and a portion deposited on the substrate containing a silver salt exhibiting a higher solubility than silver iodide and a higher absorption of blue light at wavelengths longer than 450 nm than silver iodide.

Abstract: A color photographic element having a support bearing at least one radiation sensitive emulsion layer comprising dispersing medium and silver halide grains is disclosed. The emulsion layer is a tabular grain silver halide emulsion layer Wherein at least 50 percent of total grain projected area is accounted for by tabular grains (a) bounded by {100} major faces having adjacent edge ratios of less than 10, (b) each having an aspect ratio of at least 2, and (c) internally at their nucleation site, containing iodide and at least 50 mole percent chloride. The emulsion layer has in reactive association an image dye-forming compound and a compound that contains a photographically useful group and is capable of reacting with oxidized developing agent to thereby release such group. A process for preparing the radiation sensitive tabular grain silver halide emulsions is also described.