Abstract: A device that detects smoke, both indoor and outdoor; especially applicable in areas prone to sustained water flooding. It can be used in underground locations susceptible to water ingress so it can be submersed in up to 6 feet of water for up to 24 hours. Usable in applications that requires NEMA 6P or IP68 level of water protection.

Abstract: The invention provides oil-in-water emulsions comprising recombinant collagen-like polymer in an amount sufficient to act as stabiliser of the emulsion. The polymer is especially a polypeptide which is free of helix structure, has an isoelectric point at least 0.5 pH units removed from the pH of the oil-in-water emulsion. Furthermore, amphiphilic recombinant collagen-like polymers are provided for use in oil-in-water emulsions. The amphiphilic polymers are polar at one end as a result of a relative abundance of polar amino acids, and apolar at the other end as a result of a relative abundance of apolar amino acids.

Abstract: Silver halide emulsions for photographic uses contain a nucleation peptiser having at least one region A of up to 100 amino acids. Region A can either consist of (i) at least two silver-binding amino acids and up to 98 amino acids between the two silver-binding amino acids, or can consist of (ii) a stretch of from 9 to 100 amino acids having a polarity corresponding to an average transfer free energy ?F equal to or higher than +1.0 kcal/mol. The nucleation peptizer also has at least one region B (separated from region A) having at least 50 amino acids and having a polarity corresponding to an average transfer free energy equal to or lower than ?1.0 kcal/mol and not containing methionine residues. The emulsion may also contain a growth peptiser having similar characteristics to the nucleation peptiser, but having a longer A region and a greater overall length.

Abstract: A photothermographic material comprising, on a support, an image forming layer containing at least a photosensitive silver halide, a non-photosensitive organic silver salt, a reducing agent and a binder, and a non-photosensitive outermost layer at a surface side of the support at which the image forming layer is provided, wherein: 1) the non-photosensitive organic silver salt contains 90% by mole or more of silver behenate; and a binder in the outermost layer contains 50% by weight or more of a hydrophobic polymer latex, 2) the outermost layer contains a polymer latex; and a layer adjacent to the outermost layer contains a binder which can lose fluidity upon a decrease in temperature, or 3) the outermost layer contains a polymer latex; and a coating solution for forming the outermost layer can lose fluidity upon a decrease in temperature.

Abstract: The present invention relates to an imaging element comprising at least one imaging layer and a support wherein the support comprises at least one layer comprising a splayant and a layered material, wherein the layered material has an aspect ratio from 20:1 and 500:1 and wherein the layered material comprises less than 10% by weight of the layer. The present invention also relates to a method of making a dimensionally stable imaging element comprising providing a support wherein said support comprises at least one layer comprising a splayant and a layered material, wherein said layered material comprises an aspect ratio of from 20:1 to 500:1 and wherein said layered material comprises less than 10% by weight of said at least one layer; and applying at least one imaging layer.

Abstract: A silver halide industrial radiographic material comprising on at least one side of a support a hydrophilic gelatinous non-spectrally sensitized radiation-sensitive emulsion layer, having grains, coated in a total amount in the range from 6 to 20 g, expressed as an equivalent amount of silver nitrate per square meter, and at least one non-radiation sensitive protective gelatinous antistress overcoat layer thereupon, wherein a ratio of gelatin to silver, expressed as silver nitrate in the said layer arrangement is at least 0.70, wherein said gelatinous layers are hardened by a gelatin cross-linking agent in an amount in order to have a dissolving time of at least 40 minutes, said time being defined as the period of time from the moment when the silver halide photographic material, dipped into 50 ml of an aqueous solution of 1.5% by weight of sodium hydroxide at 50° C.

Abstract: Disclosed is a silver halide photographic light-sensitive material, which comprises at least one polymer compound having a nitrogen-containing aromatic ring having a mercapto group represented by the formula Z—SH wherein Z represents a nitrogen-containing aromatic ring as a partial structure. This silver halide photographic light-sensitive material can stably contain silver halide grains of a high aspect ratio showing high sensitivity and superior planarity, shows superior pressure resistance and can be stably prepared.

Abstract: A silver halide emulsion which comprises silver halide tabular grains showing an average thickness lower than 0.15 ?m, an average diameter of at least 1.20 ?m and an average aspect ratio of at least 8:1 dispersed in a hydrophilic colloid mixture comprising from 10% to 30% by weight of dextran, from 20% to 40% by weight of a hydrogenated polysaccharide having an average molecular weight equal to or lower than 10,000, and from 40% to 60% by weight of gelatin and photographic element comprising it.

Abstract: The invention provides black and white silver halide material for optical contact copying, comprising: at least one photographic emulsion layer including a silver-halide-containing matrix in which the matrix includes a polymer and a hydrophilic binder, wherein the ratio of the weight of silver in the emulsion layer to the weight of polymer in the emulsion layer per unit area is less than 2.0. The photographic material is suitable for use in optical contact copying providing reduced contact gain compared to that provided by conventional photographic material.

Abstract: A silver halide industrial radiographic material comprising on at least one side of a support a hydrophilic gelatinous non-spectrally sensitized radiation-sensitive emulsion layer, having grains, coated in a total amount in the range from 6 to 20 g, expressed as an equivalent amount of silver nitrate per square meter, and at least one non-radiation sensitive protective gelatinous antistress overcoat layer thereupon, wherein a ratio of gelatin to silver, expressed as silver nitrate in the said layer arrangement is at least 0.70, wherein said gelatinous layers are hardened by a gelatin cross-linking agent in an amount in order to have a dissolving time of at least 40 minutes, said time being defined as the period of time from the moment when the silver halide photographic material, dipped into 50 ml of an aqueous solution of 1.5% by weight of sodium hydroxide at 50 °C.

Abstract: A silver halide emulsion which comprises silver halide tabular grains showing an average thickness lower than 0.15 &mgr;m, an average diameter of at least 1.20 &mgr;m and an average aspect ratio of at least 8:1 dispersed in a hydrophilic colloid mixture comprising from 10% to 30% by weight of dextran, from 20% to 40% by weight of a hydrogenated polysaccharide having an average molecular weight equal to or lower than 10,000, and from 40% to 60% by weight of gelatin and photographic element comprising it.

Abstract: The invention pertains to silver halide emulsions for photographic uses. The emulsions contain a nucleation peptiser, said nucleation peptiser being a polypeptide comprising: at least one region A comprising up to 100 amino acids, either consisting of (i) at least two silver-binding amino acids and up to 98 amino acids between said two silver-binding amino acids, or consisting of (ii) a stretch of from 9 to 100 amino acids having a polarity corresponding to an average transfer free energy &dgr;F equal to or higher than +1.0 kcal/mol, and at least one region B (separated from region A) comprising at least 50 amino acids and having a polarity corresponding to an average transfer free energy equal to or lower than −1.0 kcal/mol and not containing methionine residues. The emulsion may also contain a growth peptiser having similar characteristics as the nucleation peptiser, but having a longer A region and a greater overall length.

Abstract: A silver halide photographic emulsion that comprises silver halide grains. The emulsion was prepared in the presence of at least one halogen oxoacid salt represented by formula (I) below: M(XOn)m  (I) wherein M represents an alkali metal ion or alkaline-earth metal ion, X represents a halogen atom, n represents 2 or 3, and m represents 1 or 2. A silver halide photographic light-sensitive material that has at least one silver halide emulsion layer on a support. The material contains the above silver halide photographic emulsion.

Abstract: The present invention provides a photothermographic material including a support having disposed on one surface of the support, at least one image forming layer containing a photosensitive silver halide, a non-photosensitive organic silver salt, a reducing agent, a development accelerator and a binder, and at least one protective layer on the identical surface, wherein 50% by mass or more of the binder contained in the image forming layer is a water soluble binder, and the reducing agent is contained in the form of a solid dispersion.

Abstract: The invention provides oil-in-water emulsions comprising recombinant collagen-like polymer in an amount sufficient to act as stabiliser of the emulsion. The polymer is especially a polypeptide which is free of helix structure, has an isoelectric point at least 0.5 pH units removed from the pH of the oil-in-water emulsion. Furthermore, amphiphilic recombinant collagen-like polymers are provided for use in oil-in-water emulsions.

Abstract: The invention relates to a photographic element comprising a base and hydrophillic colloid layers comprising at least one layer comprising photosensitive silver halide, wherein said hydrophilic colloid imaging layers further comprise a flexibilizer agent and said flexibilizer agent has a logP of greater than −1.2.

Abstract: A single-side coated light-sensitive silver halide photographic film material has been disclosed, having on one side of a subbed support, one or more light-sensitive silver halide emulsion layer(s) overcoated with an outermost protective layer; and, at the other side of said support, a backing layer, covered with a protective outermost layer, characterized in that at least said backing layer is provided with a layer wherein, besides a cross-linked or cross-linkable first binder an organic component free from cross-linking upon reaction with a hardener is present as a second binder having a low molecular weight.

Abstract: The stability of the dyes which are obtained after processing a color photographic material is improved by the addition of a polyvinylcaprolactam.

Abstract: The invention provides black and white silver halide material for optical contact copying, comprising: at least one photographic emulsion layer including a silver-halide-containing matrix in which the matrix includes a polymer and a hydrophilic binder, wherein the ratio of the weight of silver in the emulsion layer to the weight of polymer in the emulsion layer per unit area is less than 2.0. The photographic material is suitable for use in optical contact copying providing reduced contact gain compared to that provided by conventional photographic material.

Abstract: This invention relates to a silver halide photographic element comprising a support and at least one gelatin containing imaging or non-imaging layer wherein during chemical processing the maximum swell of the layer is greater than the equilibrium swell.

Abstract: This invention relates to a silver halide photographic element comprising a support and at least one gelatin containing imaging or non-imaging layer wherein during chemical processing the maximum swell of the layer is greater than the equilibrium swell.

Abstract: A silver halide photographic element comprises a support having thereon at least one light-sensitive silver halide emulsion layer and a light-insensitive protective layer, the light-insensitive protective layer comprising an ultraviolet absorbing layer closer to the support and an outermost protective layer, the ultraviolet absorbing layer comprising an ultraviolet aborbing dye, a high boiling organic solvent, and a hydrophilic binder, the outermost protective layer comprising insoluble matte particles having a mean particle size of larger than 0.5 &mgr;m, dispersed polymer particles having a mean size of less than 0.2 &mgr;m, and a glass transition temperature of at least 70° C., and a hydrophilic binder.

Abstract: A latex comprising a polymer having an ethylenically unsaturated monomer unit containing an active methylene group and an ethylenically unsaturated monomer unit selected from methacrylic acid ester, acrylic acid ester, maleic acid ester and diene derivative, wherein said polymer is produced in the presence of a water soluble polymer through emulsion polymerization.

Abstract: The present invention is an imaging element which includes a support, at least one image forming layer, and a surface protective layer. The surface protective layer includes polymer particles having a mean particle size of less than 500 nm including a polymer or copolymer of an ethylenically unsaturated monomer, a water insoluble lubricant and a water soluble polymeric stabilizer coated on an outer surface of the polymer particle, and a binder. The polymeric stabilizer has affinity for both the organic solvent and the surface of the polymer particle.

Abstract: A tabular silver halide emulsion wherein the tabular grains account for more than 75% of the total grain projected area said emulsion comprising silver halide grains nucleated in the presence of nucleation peptizer and thereafter grown in the presence of growth peptizer, wherein at least one of the peptizers is substantially pure collagen like material prepared by genetic engineering, said peptizer having an amino acid sequence comprising more than 4 different amino acids. A process of preparing the AgX emulsion. A process of producing recombinant collagen like polypeptide comprising expression of a collagen like polypeptide encoding nucleic acid sequence by a microorganism to a degree exceeding 0.95 grammes/liter, said recombinant collagen being free of helix structure and preferably the expression occurring in a microorganism other than E. coli or Saccharomyces cerevisiae.

Abstract: There is disclosed a silver halide color photographic material and a method for forming a color photographic image by processing said color photographic material with a color developer substantially free from sulfite. Said color photographic material comprises the uppermost non-photosensitive colloid layer of photographic constitutional layers containing a dispersion obtained by emulsifying and dispersing a solution containing at least one ultraviolet-absorbing agent represented by the following formula (I) or (II) and at least one water-insoluble polymer compound, and a gelatin having an isoelectric point of 6.0 or over: ##STR1## wherein R.sub.1, R.sub.2, and R.sub.3 each represent a hydrogen atom, a halogen atom, a nitro group, a hydroxyl group, an alkyl group, an alkoxy group, an aryl group, an aryloxy group, or an acylamino group; R.sub.4 and R.sub.

Abstract: A method for producing a silver halide photographic light-sensitive material is disclosed, which comprises a support having thereon a silver halide emulsion layer and optionally another hydrophilic colloid layer. The method comprises the steps of (1) coating a coating solution of the silver halide emulsion layer or that of the hydrophilic colloid layer on the support, and (2) drying the coated layer, and the coating solution of the silver halide emulsion layer or that of the hydrophilic colloid layer comprises gelatin and a sugaralcohol.

Abstract: A tabular silica dispersion is disclosed, which is obtained by mixing a tabular silica, gelatin, a cyclodextrin and a compound capable of crosslinking gelatin. Silver halide photographic materials are also disclosed, in which the tabular silica dispersion is incorporated into a silver halide emulsion layer or a light-insensitive hydrophilic colloidal layer.

Abstract: A process for producing tabular silver halide grains in a dispersion medium solution, wherein the dispersion medium comprises a gelatin derivative containing at least two carboxyl groups (--COOH) which are newly introduced through chemical modification of amino groups (--NH.sub.2) of gelatin molecule, thereby monodisperse tabular silver halide grains small in thickness and large in aspect ratio are provided.

Abstract: Recording materials and a method of manufacturing said materials by coating hydrophilic colloidal layer compositions on a support by slide-hopper or curtain-coating techniques, followed by drying, said materials comprising a support and one or more light-sensitive and/or heat-sensitive layer(s) having a hydrophilic colloidal coating composition comprising no gelatin(in the case of (photo)thermographic materials) or gelatin in low amounts in order to provide a ratio by weight of gelatin to silver halide expressed as an equivalent amount of silver nitrate in the range from 0.05 to 0.4 (in the case of a light-sensitive silver halide photographic material) and thickening agents composed of synthetic clay and anionic macromolecular polyelectrolytes and wherein said synthetic clay is present in an amount of at least 85% by weight versus a total amount of thickening agents.

Abstract: The invention is generally accomplished by providing a photographic element and a process of its formation wherein a gelatin silver halide emulsion is provided with a thickener comprising a copolymer of the structure whereinA comprises about 10 to about 20 parts by weight of said copolymer, andB comprises about 80 to about 90 parts by weight of said copolymer.It is particularly preferred that the copolymer be provided in a hardener layer to minimize the amount of gelatin needed and thus reduce the reaction of hardener with gelatin. The invention finds a preferred use in curtain coating wherein there is a greater need for high viscosity materials, particularly at the bottom of a group of layers in order to minimize distortions of the layers as they are applied in the curtain coating process.

Abstract: This invention comprises a composition containing a hydrophilic colloid and a water soluble polymer of boric acid, and optionally a hardening agent for the hydrophilic colloid. The hydrophilic colloid is preferably gelatin. This invention also comprises a photographic element in which at least one layer thereof contains a hydrophilic colloid and a water-soluble polymer of boric acid and a method of making the photographic element.

Abstract: The present invention is a photographic element including a support, at least one silver halide emulsion layer superposed on said support; and at least one auxiliary layer. The auxiliary layer includes a gelatin-grafted-polyurethane which is formed by coating and subsequent drying of a coating composition comprising gelatin covalently bound to a polyurethane through a grafting agent, wherein a ratio of gelatin to polyurethane is from 1:10 to 2:1.

Abstract: The present invention is a silver halide photographic material including at least one layer which contains; a polymer comprising as constituent components thereof a repeating unit having a photographically useful group and at least one repeating unit having an imidazole group; and a compound having at least one functional group which reacts with an imidazole group and at least one other functional group capable of reacting with an imidazole group and a primary amine group, the amount of the compound being sufficient to insure adequate fixation of said polymer.

Abstract: A silver halide light-sensitive material comprises a support, a hardening layer and a light-sensitive layer. The hardening layer contains an ethylenically unsaturated polymerizable compound or an ethylenically unsaturated cross-linkable polymer. The light-sensitive layer contains silver halide and a hydrophilic polymer. The hardening layer or the light-sensitive layer contains a reducing agent. An adhesive layer or the light-sensitive layer contains a water-soluble synthetic polymer. The adhesive layer is provided between the hardening layer and the light-sensitive layer. The water-soluble synthetic polymer comprises a repeating unit represented by the formula (I) in an amount of at least 50 mol %: ##STR1## in which each of n1 and n2 is an integer of 10 to 5,000; each of R.sup.1 and R.sup.2 is hydrogen, an alkyl group or an aryl group; X is --O--R.sup.4 --O-- or --NR.sup.5 --; R.sup.4 is an alkylene group, an alkyleneoxyalkylene group, an arylene group or an aralkylene group; R.sup.

Abstract: There is disclosed a silver halide color photographic light-sensitive material having at least one silver halide emulsion layer on a base, wherein the said silver halide emulsion layer contains at least one cyan dye-forming coupler and a polymer represented by formula ?I!:--(A).sub.X --(B).sub.y -- formula ?I!wherein A represents a repeating unit derived from at least one ethylenically unsaturated monomer having at least one --COOM group in the molecule, wherein M represents a hydrogen atom or a cation atom; B represents a repeating unit derived from at least one ethylenically unsaturated monomer free from a --COOM group, and x and y are 15 to 85 and 85 to 15, respectively, in terms of weight percentages of A and B, provided that x+y=100.

Abstract: The present invention is a photographic element which includes a support, at least one silver halide emulsion layer, and a light-insensitive protective overcoat. The light insensitive protective overcoat includes a hydrophilic binder and polymer particles having a glass transition temperature of at least 70.degree. C. The polymer particles prepared by the process of mechanically forming oil-in-water droplets having a size less than 400 nm of an ethylenically unsaturated monomer having hydrophobic groups, the hydrophobic groups having a logP.sub.(calc) greater than a logP.sub.(calc) of the ethylenically unsaturated monomer by at least 1 unit in an aqueous medium. A hydrophilic colloid is added to the aqueous medium in an amount sufficient to render the polymer partice compatible with the hydrophilic binder. The droplets are polymerized to a size of less than 400 nm.

Abstract: The present invention is a photographic element which includes a support, at least one silver halide emulsion layer; and at least one layer containing a binder and polymer particles. The polymeric particles are prepared by the process of mechanically forming droplets having a size less than 400 nm of an ethylenically unsaturated monomer having hydrophobic groups, the hydrophobic groups having a logP.sub.(calc) greater than a logP.sub.(calc) of the ethylenically unsaturated monomer by at least 1 unit, and polymerizing said droplets so that the polymerized droplets have a size of less than 400 nm. The present invention also is a photographic element which includes a support, at least one silver halide emulsion layer; and at least one layer containing a binder and polymer particles. The polymeric particles are prepared by the process of mechanically forming droplets having a size less than 400 nm of an ethylenically unsaturated monomer having a logP.sub.

Abstract: A method for processing a silver halide light sensitive photographic material comprising a support having thereon hydrophilic colloid layers including a silver halide emulsion layer, wherein a dextran and a leuco dye compound each are independently contained in the hydrophilic colloid layer(s), the photographic material being processed with a developer containing a reductone as a developing agent.

Abstract: A silver halide light-sensitive photographic containing a hydrophilic colloid layer containg dextran or a compound of the following formula and subbing layer containing metal oxide is disclosed. ##STR1## R.sub.1 and R.sub.2 each independently represent a hydroxy group, --OM group, an amino group, an acylamino group, an alkylsulfonylamino group, an arylsulfonylamino group, an alkoxycarbonylamino group, a mercapto group or an alkylthio group, and M represents an alkali metal atom or an ammonium group and X represents two vinyl carbons substituted by R.sub.1 and R.sub.2 and an atom group necessary for forming a 5-6 ring together with carbonyl carbon.

Abstract: A silver halide light-sensitive material comprises a support, a hardening layer and a light-sensitive layer. The hardening layer contains an ethylenically unsaturated polymerizable compound and a hydrophobic polymer having an acidic group. The light-sensitive layer contains silver halide and a hydrophilic polymer. The hardening layer or the light-sensitive layer contains a reducing agent. An adhesive layer or a light-sensitive layer contains a water-soluble synthetic polymer. The adhesive layer is provided between the hardening layer and the light-sensitive layer. The water-soluble synthetic polymer comprises a repeating unit represented by the formula (I) in an amount of at least 10 mol %: ##STR1## in which each of R.sup.1 and R.sup.2 independently is hydrogen, an aliphatic group or an aromatic group.

Abstract: A photographic element comprising a support, at least one hydrophilic light-sensitive layer, and a light-insensitive layer containing a binder and solid, nonporous polymer matte particle having the formula:(A).sub.x (B).sub.ywhere A is a monofunctional ethylenically unsaturated monomer, B is a polyfunctional ethylenically unsaturated monomer, x is from 0 to 55 mole %, and y is about 45 to 100 mole %.

Abstract: An emulsification and dispersion method of a hydrophobic, photographically useful compound comprising dispersing a water-insoluble phase containing the hydrophobic, photographically useful compound in water or in a hydrophilic colloid composition, wherein the water-insoluble phase at a temperature at which the prepared dispersion is stored may have a viscosity of from 100 poise or more to less than 1,000,000 poise at the shear rate of 10 sec.sup.-1. According to the present invention, a silver halide photographic material comprising a fine dispersion of a hydrophobic, photographically useful compound and having an excellent production suitability can be obtained.

Abstract: A photographic silver halide material having a support and at least one layer which is deposited thereon and which contains a polypeptide, at least 90 mole % of which consists of structural units of formula I, ##STR1## where R represents OH, NH.sub.2, NHR.sub.1, NR.sub.1 R.sub.2, NH-- or NR.sub.1 --R.sub.1, R.sub.2 represent a hydrocarbon radical, which is optionally substituted,R.sub.4 represents NH or N--, andm represents 0 or 1,wherein the bond between two structural units of formula I is always an --N--C bond and m is equal to 1 in 2 to 35% of the structural units of formula I, is characterised by improved photographic properties.

Abstract: The invention describes silver halide packet emulsion grains or crystals that are conventionally precipitated using gelatin of a given isoelectric pH, surrounded by a layer of gelatin-grafted-polymer particles wherein the grafted gelatin has a different isoelectric pH and the said gelatin-grafted-polymer particles are optionally chemically bonded to the gelatin surrounding the silver halide microcrystals. Such packet emulsions can form the basis for a mixed-packet color photographic system.

Abstract: Stable photographic coating compositions comprising a polymer latex are prepared by mixing an aqueous solution comprising gelatin with a latex dispersion of a polymer of the formula(A).sub.x (B).sub.y (C).sub.zwhereA and B are formed from nonionic monomers,C is formed from anionic monomers, andx, y and z are monomer weight fractions where x=0 to 1.0, y=0 to 1.0, x+y=about 0.98 to 1.0, and z=0 to about 0.02,wherein A, B, x and y are such that latex dispersions of polymers of the formula (A).sub.x (B).sub.y have calcium ion critical coagulation concentrations of less than 80 mM Ca.sup.+2 in gelatin solutions,wherein the gelatin of the aqueous solution mixed with the latex dispersion comprises a gelatin of low calcium ion content such that the coating composition has a calcium Ca.sup.2+ concentration of less than 2 mM. The method of the invention allows for the preparation of aqueous gelatin coating solutions comprising latex dispersions of polymers which are unstable in the presence of calcium ions.

Abstract: A photographic material having at least one photosensitive silver halide emulsion layer and at least one non-photosensitive layer on a support, which material contains at least one compound of the formula (I) in at least one of the layers, ##STR1## in which R.sub.1 to R.sub.5, L, m and n have the meaning stated in the specification and PUG means a photographically active group, may be produced in thinner layers.

Abstract: A color image forming method is disclosed, comprising developing a silver halide photographic material and bleach and/or fixing the photographic material, wherein the color image is formed in the presence of a dextran. The dextran may be incorporated in the photographic material or a processing solution.

Abstract: This invention describes the composition and method of preparation of heteroflocculated packet emulsion clusters containing a light sensitive and selectively photosensitized silver halide emulsion particles and particles of photographic agents such as dye-forming coupler particles. The silver halide emulsion particles are associated with a layer of adsorbed peptizing gelatin with an isoelectric pH of P.sub.1 and the grafted gelatin of the gelatin-grafted-polymer particles comprising the photographic agent has an isoelectric pH of P.sub.2 such that P.sub.1 is different than P.sub.2. At least one of the peptizing and grafted gelatins is an isoing gelatin which is sufficiently derivatized to remove ionic groups thereof such that approaching the isoelectric pH in an aqueous solution of the isoing gelatin causes massive heteroflocculation.

Abstract: Dye imbibition printing blanks are disclosed comprising a support bearing a layer comprising a cationic mordant, a hydrophilic colloid and a plasticizer polymer, wherein the plasticizer polymer is a latex polymer having a glass transition temperature below about 30.degree. C. comprising from about 2 to 20 wt % of units having a quaternary ammonium group. In a preferred embodiment, the latex polymer comprises a vinyl co-polymer addition product of from about 50 to 98 weight percent of acrylic or methacrylic ester units, 0 to 48 weight percent of vinyl benzene units and 2 to 20 weight percent of the quaternary ammonium group containing unit. This latex provides a dye imbibition printing blank substantially free of haze and brittleness.