Abstract: A method of manufacturing a liquid electrophotographic ink includes: mixing a pigment with a resin powder; and microfluidizing the mixture together with a carrier fluid in a microfluidizer in a number of passes to form a concentrated ink containing composite particles.

Abstract: Disclosed is an electrostatic ink composition, comprising a single charge director and a charge control agent that counters the build up of negative optical density memory on the intermediate transfer member of a printing apparatus using the electrostatic ink.

Abstract: A deinkable liquid toner is disclosed herein. The deinkable liquid toner includes a non-polar carrier fluid, a styrene-alkyl acrylate, and a colorant. The styrene-alkyl acrylate has a glass transition temperature ranging from about 65 C to about 100 C. A method for making the deinkable liquid toner and a printing system are also disclosed herein.

Abstract: A system for automatic cleaning in a liquid ink printing system includes an ink tank, a pump which is configured pump a carrier liquid from the ink tank as a pressurized carrier liquid flow. A filter is configured to remove particulates from the pressurized carrier liquid flow to produce a filtered carrier liquid flow. A sprayer is configured to receive the filtered carrier liquid flow and spray the filtered carrier liquid flow into an interior of the ink tank. The pump recirculates the filtered carrier liquid flow through the filter and the sprayer. A method for automatic cleaning in a printing system is also included.

Abstract: Toner compositions, treated fluoropolymer particles, methods of making treated fluoropolymer particles, and the like, are disclosed.

Abstract: A method of manufacturing a liquid electrophotographic ink includes: mixing a first portion of a carrier fluid and a resin to form a resin mixture; heating the resin mixture until the resin has melted; cooling the resin mixture to form a resin cake, followed by pulverizing the resin cake to form a resin powder; and mix the resin powder with a pigment and a second portion of carrier fluid in a microfluidizer to form a concentrating ink containing composite particles. An alternate method of manufacturing a liquid electrophotographic ink includes: mixing a pigment with a resin powder; and microfluidizing the mixture together with a carrier fluid in a microfluidizer in a number of passes to form a concentrated ink containing composite particles.

Abstract: The present disclosure is drawn to a liquid toner composition comprising: (a) a carrier liquid; (b) particles comprising (i) a first component comprising a polymer having acidic side groups; and (ii) a second component comprising a polymer having ester side groups; and (c) a charge director. Also described herein are a method of producing a liquid toner composition and a method of electrophotographic printing using a liquid toner composition.

Abstract: An electronic ink containing charged particles includes a combination of resin particles, a pigment, and a charge director. The resin particles exhibit an average particle size less than 1.0 micron and contain a resin that exhibits a molecular weight of 500 to 20,000. The pigment is loaded on the resin particles. The charge director can physically associate with the resin particles. The charged particles may be negative or positive.

Abstract: The present disclosure is drawn to an electrostatic ink composition comprising: (a) a carrier liquid; (b) particles comprising: (i) a polymer having a melt flow rate of less than 60 g/10 minutes, (ii) a colorant, (c) a charge director, wherein the electrostatic ink composition excludes a positively charged organic molecule or an organic molecule capable of becoming a positively charged organic molecule during an electrostatic printing process. Also disclosed herein is a method of producing a electrostatic ink composition and a method of electrophotographic printing an electrostatic ink composition.

Abstract: A liquid electrophotographic ink is disclosed herein. One example of the liquid electrophotographic ink includes a non-polar carrier liquid; pigmented toner particles; a charge director; and polymer resin encapsulated metal oxide nanoparticles. A method for making the liquid electrophotographic ink is also disclosed herein.

Abstract: A method of manufacturing a liquid electrophotographic ink includes: mixing a first portion of a carrier fluid and a resin to form a resin mixture; heating the resin mixture until the resin has melted; cooling the resin mixture to form a resin cake, followed by pulverizing the resin cake to form a resin powder; and mix the resin powder with a pigment and a second portion of carrier fluid in a microfluidizer to form a concentrating ink containing composite particles. An alternate method of manufacturing a liquid electrophotographic ink includes: mixing a pigment with a resin powder; and microfluidizing the mixture together with a carrier fluid in a microfluidizer in a number of passes to form a concentrated ink containing composite particles.

Abstract: An ink is disclosed. The ink includes a carrier fluid; an encapsulated metallic pigment particle further including a metallic pigment particle and a polymer, wherein the polymer covers between 70% and 100%, inclusive, of the surface area of the metallic pigment particle and wherein the morphology of the metallic pigment particle by itself is substantially the same as the morphology of the metallic pigment particle covered by the polymer; and a polymer resin.

Abstract: A liquid electrophotographic ink concentrate includes non-volatile solids present in an amount ranging from about 20% to about 70% of the ink concentrate, the non-volatile solids including encapsulated pigment particles having a particle size ranging from about 500 nm to about 20 ?m, and a viscosity modifier. The ink concentrate includes a balance of a liquid composition, the liquid composition including a carrier. The concentrate is dispersible in an ink vehicle to form a print-ready liquid electrophotographic ink having the non-volatile solids present in an amount ranging from about 0.5% to 5% of the print-ready liquid electrophotographic ink.

Abstract: The present disclosure is drawn to LEP toners, systems, and methods of manufacturing LEP liquid toners. Specifically, a high NVS liquid toner can comprise a ground up admixture of a hydrocarbon carrier fluid, pigment particles, and a polymer paste having an NVS content of about 38 wt % to about 65 wt %. The resultant high NVS liquid toner has an NVS content of about 28 wt % to about 38 wt % and a viscosity of about 3,000 cPs to about 25,000 cPs.

Abstract: A liquid toner is disclosed herein. The liquid toner includes a toner composition with latex particles incorporated therein. The toner composition includes charged toner particles incorporated into a non-polar liquid carrier. The latex particles are polymer particles of acrylic monomers, vinylic monomers, or mixtures thereof, and each latex particle has a particle size ranging from about 20 nm to about 5 ?m.

Abstract: The present disclosure is drawn to compositions and methods for a liquid electrophotographic ink printing. The composition comprises a liquid vehicle; ink particles; and a charge director system, comprising i) a primary charge component, ii) a secondary charge component, and iii) an electrical stability additive; such that the charge director system provides the following ink conductivities: a high field conductivity of about 100 pS/cm to about 500 pS/cm, a low field conductivity of about 20 pS/cm to about 200 pS/cm, a direct charge conductivity less than about 30 pS/cm, and a particle conductivity of at least 100 pS/cm. Additionally, the liquid electrophotographic ink can be formulated for printing from a liquid electrophotographic printer.

Abstract: The present disclosure is drawn to a liquid electrophotographic ink, comprising a carrier liquid, and a pigment-polymer blend composition dispersed in the carrier liquid, the pigment-polymer blend composition comprising a pigment and a polymer blend of three distinct polymers. The polymer blend can comprise a first polymer having a melt flow rate of about 20 to about 70 g/10 min and a Vicat softening point of about 60° C. to about 70° C., a second polymer having a melt flow rate of about 80 to about 120 g/10 min, and a third polymer having an acidity of about 160 to about 230 mg KOH/g and a melt flow rate of at least 500 g/10 min. The liquid electrophotographic ink is typically formulated for printing from a liquid electrophotographic printer.

Abstract: Liquid electrophotographic ink concentrates and methods of preparing the same are disclosed herein. An example of the method includes preparing a mixture of ink components using a first predetermined thermal profile. The ink components include a resin, a pigment, and a carrier. The method further includes preparing a microfluidizer with a composition at a temperature within a predetermined range and processing the mixture in the prepared microfluidizer to form the concentrate. Processing the mixture includes pressure-feeding the mixture into the prepared microfluidizer, passing the mixture through the prepared microfluidizer for a predetermined number of times, and utilizing a second predetermined thermal profile while passing the mixture through the prepared microfluidizer. A viscosity modifier is added to the mixture before and/or during the processing of the mixture.

Abstract: Ink concentrate container, comprising an inner volume, containing ink for liquid electrostatic printing (LEP), the ink comprising a carrier liquid and electrically chargeable toner particles for electrostatic imaging, an outlet, and at least one flexible wall extending along the inner volume, so that ink can be pressed through the outlet out of the inner volume by deforming the flexible wall.

Abstract: An electronic ink containing charged particles includes a combination of resin particles, a pigment, and a charge director. The resin particles exhibit an average particle size less than 1.0 micron and contain a resin that exhibits a molecular weight of 500 to 20,000. The pigment is loaded on the resin particles. The charge director can physically associate with the resin particles. The charged particles may be negative or positive.