Abstract: A brightening system includes a substrate and an amphoteric stilbene composition established on the substrate. The amphoteric stilbene composition includes a predetermined amount of at least one of 4,4?-diamino-2,2?-stilbene disulfonic acid, biarylsulfonate-4,4?-diamino-2,2?-stilbene disulfonic acid, biaryldisulfonate-4,4?-diamino-2,2?-stilbene disulfonic acid, derivatives thereof, salts thereof, and mixtures thereof; and a fixing agent.

Abstract: A brightening system includes a substrate and an amphoteric stilbene composition established on the substrate. The amphoteric stilbene composition includes a predetermined amount of at least one of 4,4?-diamino-2,2?-stilbene disulfonic acid, biarylsulfonate-4,4?-diamino-2,2?-stilbene disulfonic acid, biaryldisulfonate-4,4?-diamino-2,2?-stilbene disulfonic acid, derivatives thereof, salts thereof, and mixtures thereof; and a fixing agent.

Abstract: An amphoteric stilbene composition is disclosed. The composition includes a fixing agent mixed with a predetermined amount of 4,4?-diamino-2,2?-stilbene disulfonic acid, biarylsulfonate-4,4?-diamino-2,2?-stilbene disulfonic acid, biaryldisulfonate-4,4?-diamino-2,2?-stilbene disulfonic acid, derivatives thereof, salts thereof, and/or mixtures thereof.

Abstract: A high-reliability invisible ink printing system is provided which generates high-definition, lightfast images that are easily read or otherwise detected using far red, infrared, and/or ultraviolet light. The inks contain an uncomplexed invisible metal phthalocyanine far red/infrared fluorophore (optimally chloroaluminum [III] phthalocyanine tetrasulfonic acid or salts thereof). An ultraviolet fluorophore can also be included. The inks are invisible to the unaided eye. However, when exposed to far red or infrared light (wavelength=about 650-715 nm) they will fluoresce at a wavelength of about 670-720 nm. If an ultraviolet fluorophore is employed, the inks can also be detected by applying ultraviolet light (wavelength=about 250-380 nm) which results in fluorescent emission at a wavelength of about 400-650 nm. The inks are well suited for delivery using inkjet technology to efficiently form invisible images.

Abstract: A high-reliability invisible ink printing system is provided which generates high-definition, lightfast images that are easily read or otherwise detected using far red, infrared, and/or ultraviolet light. The inks contain an uncomplexed invisible metal phthalocyanine far red/infrared fluorophore (optimally chloroaluminum [III] phthalocyanine tetrasulfonic acid or salts thereof). An ultraviolet fluorophore can also be included. The inks are invisible to the unaided eye. However, when exposed to far red or infrared light (wavelength=about 650-715 nm) they will fluoresce at a wavelength of about 670-720 nm. If an ultraviolet fluorophore is employed, the inks can also be detected by applying ultraviolet light (wavelength=about 250-380 nm) which results in fluorescent emission at a wavelength of about 400-650 nm. The inks are well suited for delivery using inkjet technology to efficiently form invisible images.

Abstract: Ink-jet inks and method of printing using the same are provided, the inks comprising at least one colorant and an aqueous vehicle, the vehicle comprising at least one anionic or nonionic surfactant, at least one alkoxylated polyhydroxy organic solvent, at least one water-miscible organic solvent; and optionally, at least one hydantoin compound, and optionally, at least one branched C.sub.2 -C.sub.7 alcohol. The inks enable production of near photographic images having little or no coalescence, excellent waterfastness, and reduced dry time, on a range of print media, in particular, photobase glossy paper.

Abstract: System for replenishing liquid developer in equipment, such as a printer, whereby the percent of toner solids is maintained at about 0.5 to 4% by weight based on the total weight of liquid developer, the system comprising at least one liquid toner concentrate vessel containing aggregates of thermoplastic resin particles, median particle size (volume weighted) greater than 15 .mu.m, and with 90% of the particles (volume weighted) not less than 30 .mu.m, composed of 50 to 100% by weight of particles and 0 to 50% by weight carrier liquid; a liquid vessel containing carrier liquid, means communicating each of said vessels with a dispersing vessel containing high shearing or high impact means wherein contents of the liquid toner concentrate vessel and the liquid vessel are supplied thereto and the resin particles are dispersed in the carrier liquid to form particles having a median particle size (volume weighted) of less than 15 .mu.m, and with 90% of the particles (volume weighted) less than 30 .mu.

Abstract: A liquid developer contains a liquid carrier, a halogenated charge director and toner particles. Preferably, the charge director contains a fluorinated portion and a hydrocarbon portion. The charge director provides a developer which is fully charged but has a very small residual conductivity, thus providing a high quality image.

Abstract: A liquid developer is prepared from a liquid electrostatic developer concentrate comprising up to 80% toner solids and a surfactant. The liquid electrostatic developer concentrate may be prepared by preparing a liquid electrostatic developer containing up to 20% toner solids; subsequently adding a surfactant to the liquid electrostatic developer; and concentrating the liquid electrostatic developer. The surfactant permits the easy redispersion of the toner solids at the time of use.

Abstract: A liquid electrostatic developer includes a toner which is made from a halogenated resin, a thermoplastic resin and a colorant. Preferably the halogenated resin is a fluorinated resin. Optionally, a charge adjuvant may be present. The liquid electrostatic developer is prepared by a process wherein the halogenated resin, the thermoplastic resin, the optional colorant and the optional charge adjuvants are melt blended to form a mixture. This mixture is ground at a cold temperature, and subsequently charged with a charge director. The toner used in the liquid electrostatic developer formed by this process has excellent thermoplastic and electrical properties and provides a developer with excellent imaging characteristics.

Abstract: Electrostatic liquid developer consisting essentially of(A) a nonpolar liquid having a Kauri-butanol value of less than 30, present in a major amount,(B) thermoplastic resin particles having an average by area particle size of less than 10 .mu.m, and coated with (C),(C) an AB diblock copolymer toner particle dispersant as defined, and(D) a nonpolar liquid soluble ionic or zwitterionic compound. Optionally a colorant and charge adjuvant are present. The process of making the electrostatic liquid developer is described. The electrostatic liquid developer is useful in copying, making proofs including digital color proofs, lithographic printing plates, and resists.

Abstract: A process for preparing an improved positive-working electrostatic liquid developer comprising(A) dispersing at an elevated temperature in a vessel a thermoplastic resin and a nonpolar liquid having a Kauri-butanol value of less than 30, while maintaining the temperature in the vessel at a temperature sufficient to plasticize and liquify the resin and below that at which the nonpolar liquid degrades and the resin decomposes,(B) cooling the dispersion, either(1) without stirring to form a gel or solid mass, followed by shredding the gel or solid mass and grinding by means of particulate media;(2) with stirring to form a viscous mixture and grinding by means of particulate media; or(3) while grinding by means of particulate media to prevent the formation of a gel or solid mass;(C) separating the dispersion of toner particles having an average particle size of less than 30 .mu.

Abstract: Process for the preparation of toner particles for electrostatic liquid developers, which upon fusing to paper have a gloss .gtoreq.10 units over the paper gloss comprising:(A) dispersing at least one thermoplastic resin, at least one pigment, and a hydrocarbon liquid having a Kauri-butanol value of greater than 120 such that the dispersion contains 10% or more by weight solids by means of particulate media whereby the moving particulate media creates shear and/or impact while maintaining the temperature for 5 to 180 minutes in the vessel at a temperature of at least 15.degree. C. above the point at which the resin is plasticized or liquified by the hydrocarbon liquid and below that at which the hydrocarbon liquid boils and the resin and/or pigment decomposes,(B) continuing dispersion of the resin, pigment and hydrocarbon liquid as in Step (A) while maintaining the temperature for 5 to 180 minutes in the vessel at least 5.degree. C. below the point to at least 10.degree. C.

Abstract: Process for stabilizing the crystalline grain morphology of silver halide grain cores prepared in the presence of a dispersing medium and an aminoazapyridine compound at a pH of 2.5 to 9 and pCl of 0 to 3, at least 50% of the total projected area of the total grain population being noncubic silver halide grain cores and the halide content being at least 50 mole percent chloride, based on total moles of silver precipitated, the improvement wherein after 60% of aqueous silver salt solution based on the total moles of silver precipitated is introduced a second halide salt, e.g., bromide, is added thereby forming on the grain cores a shell of 0.5 to 20 mole % based on the total moles of silver precipitated. The emulsions are useful in X-ray, color separation, inverse transfer films, and "dry-silver" applications, etc.

Abstract: A positive charged electrostatic liquid developer consisting essentially of(A) a non-polar liquid having a Kauri-butanol value of less than 30,(B) thermoplastic resin particles, average by area particle size of less than 10 .mu.m,(C) a charge director compound, and(D) at least one inorganic acid having a solubility of at least 0.5% based on the weight of charge director compound in a mixture of (A) and (C) and represented by the formula:H.sub.x Ywherein x is an integer from 1-4 and is equal to the negative charge on the anion,Y is a moiety selected from the group consisting of Cl.sup.-, F.sup.-, NO.sub.3.sup.-, NO.sub.2.sup.-, PO.sub.4.sup.-3, SO.sub.4.sup.-2, SO.sub.3.sup.-2, ClO.sub.4.sup.-, and IO.sub.4.sup.-.The liquid developer is useful in copying, color proofing, digital color proofing, making lithographic printing plates, and resists.