Abstract: Aqueous particle-free fluids can be used in inkjet printing methods including continuous inkjet printing processes. Each of these fluids has a dynamic viscosity of less than or equal to 5 centipoise (5 mPa-sec) at 25° C., and each consists essentially of: a composition consisting of one or more compounds represented by the following Structure (I): HO—CH2—CH2—R?? (I) wherein R is a substituted or unsubstituted phenyl group or a substituted or unsubstituted phenoxy group, in a total amount of at least 0.5 weight % and up to and including 2 weight %, based on the total weight of the aqueous inkjet ink composition. Such aqueous particle-free fluids can be used as replenishment or printhead maintenance fluids. Two or more of such aqueous particle-free fluids can be packaged, sold, and use as part of fluid sets.

Abstract: Aqueous inkjet ink compositions are useful in inkjet printing processes and can be used individually or as part of an inkjet ink set. Each aqueous inkjet ink composition has a dynamic viscosity of 5 centipoise (5 mPa-sec) or less at 25° C., and consists essentially of: (a) a polymer-dispersed pigment colorant at 0.9-6 weight %; (b) a composition consisting of compounds represented by the following Structure (I): HO—CH2—CH2—R?? (I) wherein R is a substituted or unsubstituted phenyl group or a substituted or unsubstituted phenoxy group, at 0.5-2 weight %; (c) a water-soluble humectant, co-solvent, or both, at than or equal to 20 weight %. Each polymer-dispersed pigment colorant has a 50th percentile particle diameter of less than 70 nm and a 95th percentile particle diameter of less than 150 nm, as measured using a dynamic light scattering particle size analyzer.

Abstract: Aqueous particle-free fluids can be used in inkjet printing methods including continuous inkjet printing processes. Each of these fluids has a dynamic viscosity of less than or equal to 5 centipoise (5 mPa-sec) at 25° C., and each consists essentially of: a composition consisting of one or more compounds represented by the following Structure (I): HO—CH2—CH2—R??(I) wherein R is a substituted or unsubstituted phenyl group or a substituted or unsubstituted phenoxy group, in a total amount of at least 0.5 weight % and up to and including 2 weight %, based on the total weight of the aqueous inkjet ink composition. Such aqueous particle-free fluids can be used as replenishment or printhead maintenance fluids. Two or more of such aqueous particle-free fluids can be packaged, sold, and use as part of fluid sets.

Abstract: Aqueous particle-free fluids can be used in inkjet printing methods including continuous inkjet printing processes. Each of these fluids has a dynamic viscosity of less than or equal to 5 centipoise (5 mPa-sec) at 25° C., and each consists essentially of: a composition consisting of one or more compounds represented by the following Structure (I): HO—CH2—CH2—R?? (I) wherein R is a substituted or unsubstituted phenyl group or a substituted or unsubstituted phenoxy group, in a total amount of at least 0.5 weight % and up to and including 2 weight %, based on the total weight of the aqueous inkjet ink composition. Such aqueous particle-free fluids can be used as replenishment or printhead maintenance fluids.

Abstract: Aqueous particle-free fluids can be used in inkjet printing methods including continuous inkjet printing processes. Each of these fluids has a dynamic viscosity of less than or equal to 5 centipoise (5 mPa-sec) at 25° C., and each consists essentially of: a composition consisting of one or more compounds represented by the following Structure (I): HO—CH2—CH2—R ??(I) wherein R is a substituted or unsubstituted phenyl group or a substituted or unsubstituted phenoxy group, in a total amount of at least 0.5 weight % and up to and including 2 weight %, based on the total weight of the aqueous inkjet ink composition. Such aqueous particle-free fluids can be used as replenishment or printhead maintenance fluids.

Abstract: Substrates can be inkjet printed using an aqueous inkjet ink composition having a dynamic viscosity of 5 centipoise (5 mPa-sec) or less at 25° C., and consisting essentially of: (a) a polymer-dispersed pigment colorant at 0.9-6 weight %; (b) a composition consisting of one or more compounds represented by the following Structure (I): HO—CH2—CH2—R??(I) wherein R is a substituted or unsubstituted phenyl group or a substituted or unsubstituted phenoxy group, at 0.5-2 weight %; and (c) a water-soluble humectant, co-solvents, or both, at 20 weight %. Each polymer-dispersed pigment colorant has a 50th percentile particle diameter of less than 70 nm and a 95th percentile particle diameter of less than 150 nm, measured using a dynamic light scattering particle size analyzer. Replenishment or maintenance fluids containing a Structure (I) compound can also be used during the inkjet printing process.

Abstract: An aqueous particle-free inkjet ink composition has a pH of 7 to 9, and consists essentially of: (A) water-soluble dye colorants present in a total amount of 2-10 weight %, (B) a water-soluble polymer present in an amount of 1-4 weight %, and an aqueous medium consisting essentially of water. The water-soluble polymer has an acid number ?130 and a molecular weight of 5,000 to 20,000. It comprises: (a) 55-80 mol % of recurring units derived from ethylenically unsaturated polymerizable monomers selected from substituted or unsubstituted styrenes, (meth)acrylates, and combinations thereof, each (meth)acrylate comprising either a pendant phenyl group or an alkyl ester group having 12 to 20 carbon atoms; and (b) 20-35 mol % of recurring units comprising (meth)acrylic acid, all based on total water-soluble polymer recurring units. The one or more water-soluble dye colorants are chosen singly or collectively to provide a hue other than black.

Abstract: An aqueous particle-free inkjet ink composition has a pH of 7 to 9, and consists essentially of: (A) one or more water-soluble dye colorants present in a total amount of 2-10 weight %, (B) a water-soluble polymer present in an amount of 1-4 weight %, and an aqueous medium consisting essentially of water. The water-soluble polymer has an acid number or at least 130 and a molecular weight of 5,000 to 20,000. It comprises: (a) 55-80 mol % of recurring units derived from one or more ethylenically unsaturated polymerizable monomers selected from the group consisting of substituted or unsubstituted styrenes, (meth)acrylates, and combinations thereof, each (meth)acrylate comprising either a pendant phenyl group or an alkyl ester group having 12 to 20 carbon atoms; and (b) 20-35 mol % of recurring units comprising (meth)acrylic acid, all based on total water-soluble polymer recurring units. The one or more water-soluble dye colorants are chosen singly or collectively to provide a hue other than black.

Abstract: An aqueous particle-free inkjet ink composition has a pH of 7 to 9, and consists essentially of: (A) a water-soluble dye colorant present in an amount of 2-10 weight %, (B) a water-soluble polymer present in an amount of 1-4 weight %, and an aqueous medium consisting essentially of water. The water-soluble polymer has an acid number or at least 130 and a molecular weight of 5,000 to 20,000. It comprises: (a) 55-80 mol % of recurring units derived from one or more ethylenically unsaturated polymerizable monomers selected from the group consisting of substituted or unsubstituted styrenes, (meth)acrylates, and combinations thereof, each (meth)acrylate comprising either a pendant phenyl group or an alkyl ester group having 12 to 20 carbon atoms; and (b) 20-35 mol % of recurring units comprising (meth)acrylic acid, all based on total water-soluble polymer recurring units.

Abstract: A method is useful for providing an ink jetted image with improved print optical density. The method includes use of an aqueous particle-free inkjet ink composition that consists essentially of: aqueous particle-free inkjet ink composition has a pH of 7 to 9, and consists essentially of: (A) a water-soluble dye colorant at 2-10 weight %, (B) a water-soluble polymer at 1-4 weight %, and an aqueous medium consisting essentially of water. The water-soluble polymer has an acid number or at least 130 and a molecular weight of 5,000-20,000. It comprises: (a) 55-80 mol % of recurring units derived from one or more ethylenically unsaturated polymerizable monomers selected from the group consisting of substituted or unsubstituted styrenes, (meth)acrylates, and combinations thereof, each (meth)acrylate comprising either a pendant phenyl group or an alkyl ester group having 12-20 carbon atoms; and (b) 20-35 mol % of recurring units comprising (meth)acrylic acid.

Abstract: A method for printing an image with authentication features, including: printing a media treatment material onto a print medium in accordance with a pattern of predefined authentication features, and printing one or more visible printing materials onto the print medium in accordance with an image pattern, thereby providing a printed visible image. The media treatment material alters an interaction between the visible printing materials and the print medium so that characteristics of the interaction, such as printing material penetration characteristics, are different in image regions where the media treatment material was printed than in image regions where the media treatment material was not printed. The difference in the characteristics of the interaction between the one or more visible printing materials and the print medium causes the pattern of authentication features to be detectable.

Abstract: A method for printing an image with authentication features, including: printing a media treatment material onto a print medium in accordance with a pattern of predefined authentication features, and printing one or more visible printing materials onto the print medium in accordance with an image pattern, thereby providing a printed visible image. The media treatment material alters lateral spreading characteristics of the visible printing materials within the print medium, so that the lateral spreading characteristics are different in image regions where the media treatment material was printed than in image regions where the media treatment material was not printed. The difference in the lateral spreading characteristics causes the pattern of authentication features to be detectable.

Abstract: An aqueous ink jet printer ink composition is designed for ink jet printing of fluorescent images. This composition contains fluorescent pigment particles that have (1) an excitation peak wavelength of at least 300 nm and less than 400 nm, and (2) an emission peak that is greater than 400 nm and up to and including 700 nm when exposed to fluorescent-exciting radiation. The non-polymeric fluorescent pigment particles have a median particle size that is greater than 10 nm and up to and including 500 nm, and the 95th percentile fluorescent pigment particle size is less than 150 nm. The composition can be continuously printed on various pretreated or untreated receiver elements or articles to provide a fluorescent image that can be detected when excited at the appropriate wavelength. The fluorescent image can thus be used as a security or identification mark for various purposes.

Abstract: A method of continuous inkjet printing by using a printing fluid comprising water, a soluble or dispersed polymeric component, and less than a total of 10 wt % of low-volatile water soluble humectant having a boiling point of greater than 170C; ejecting spaced droplets from a printhead and controlling the spaced droplets to mark a substrate; stopping delivery of the printing fluid to the printhead; and then delivering the maintenance fluid from the maintenance fluid supply to the printhead to purge the printing fluid from the printhead, with the maintenance fluid comprising water and at least 5 wt % low-volatile water soluble humectant having a boiling point of greater than 170C, wherein the concentration of low-volatile water soluble humectant in the maintenance fluid is greater than that in the printing fluid to purge the printing fluid from the printhead.

Abstract: A method of continuous inkjet printing comprising: A) providing a main fluid supply of a continuous inkjet printer with a printing fluid comprising water, a soluble or dispersed polymeric component, and less than a total of 10 wt % of low-volatile water soluble humectant having a boiling point of greater than 170 C; B) delivering the printing fluid from the main fluid supply to a printhead and ejecting a continuous stream of the printing fluid from the printhead which continuous stream is broken into spaced droplets; C) in response to electrical signals received from a control mechanism, controlling the spaced droplets to select between printing droplets for marking a substrate and nonprinting droplets that are collected and returned to the main fluid supply; D) stopping delivery of the printing fluid to the printhead upon completion of a printing procedure; E) providing a maintenance fluid supply with a maintenance fluid comprising water and at least 5 wt % low-volatile water soluble humectant having a boili