Abstract: A liquid developer includes: a carrier liquid; and toner particles that are dispersed in the carrier liquid and that includes a styrene-based thermoplastic elastomer, a styrene-based thermoplastic resin, and a quaternary ammonium base-containing polymer having a constituent unit expressed by Chemical Formula I: wherein R1 represents hydrogen or an alkyl group with a carbon number equal to or less than 3, R2 represents an alkylene group with a carbon number equal to or less than 18, R3 to R5 represent an alkyl group or an aralkyl group with a carbon number equal to or less than 18, X represents —COO— or —CONH—, and Y? represents a halogen ion or an anion having a —COO— group or a —SO3— group in the structure thereof.

Abstract: A liquid developer contains toner, a carrier liquid in which the toner are dispersed, and a graft copolymer of an acrylic polymer and a polysiloxane.

Abstract: A toner includes a resin having an unsaturated double bond, a thiol compound having a bi- or more-functional thiol group, and a polymerization initiator.

Abstract: A liquid developer is provided. The liquid developer includes a liquid insulator and toner particles. The liquid insulator toner particles include a resin material, a colorant, a substance A, a substance B, and a substance C. The substance A is an acrylic-modified silicone. The substance B is at least one selected from the group consisting a quaternary cationic silicone, an aminophenyl-modified silicone, and a phenyl-modified silicone. The substance C is at least one of a silanol-containing polysiloxane and a fluorine-modified silicone. The average degree of roundness R1 of the toner particles is 0.890 or greater, if the degree of roundness is expressed as L0/L1, where L1 (?m) is a circumference of a profile view of a measured particle and L0 (?m) is the circumference of a perfect circle of a circumference of a profile view corresponding to the profile view of the measured particle.

Abstract: A liquid developer contains a liquid insulator formed of a liquid hydrocarbon, toner particles formed by chemically modifying surfaces of mother toner particles formed of a material containing a rosin-based resin and a polyester resin with a polyalkyleneimine, and a metal soap dissolved in the liquid insulator.

Abstract: There is provided a discharge lamp of an embodiment includes a burner having a light emitting part, and a disk-shaped flange which is capable of holding the burner so that the light emitting part is positioned at a front end side of the flange. The flange includes a resin part formed at an edge of the flange, and a metal part formed to be embedded in the resin part.

Abstract: A liquid developer contains a carrier liquid, and toner particles containing a binder resin and a pigment surface-treated with a polyallylamine compound as a colorant.

Abstract: A toner includes a resin having an unsaturated double bond, a thiol compound having a bi- or more-functional thiol group, and a polymerization initiator.

Abstract: A toner includes a binder resin including an amorphous polyester resin (A), a crystalline polyester resin (B), and a polyurethane thermoplastic elastomer (C).

Abstract: The invention is to provide a toner with a small difference of charging properties and an excellent cleaning property. The toner includes toner particles of cylindrical bodies.

Abstract: A liquid developer includes: a carrier liquid; and toner particles that are dispersed in the carrier liquid and that includes a styrene-based thermoplastic elastomer, a styrene-based thermoplastic resin, and a quaternary ammonium base-containing polymer having a constituent unit expressed by Chemical Formula I: wherein R1 represents hydrogen or an alkyl group with a carbon number equal to or less than 3, R2 represents an alkylene group with a carbon number equal to or less than 18, R3 to R5 represent an alkyl group or an aralkyl group with a carbon number equal to or less than 18, X represents —COO— or —CONH—, and Y? represents a halogen ion or an anion having a —COO— group or a —SO3— group in the structure thereof.

Abstract: A liquid developer is provided. The liquid developer includes a liquid insulator and toner particles. The liquid insulator toner particles include a resin material, a colorant, a substance A, a substance B, and a substance C. The substance A is an acrylic-modified silicone. The substance B is at least one selected from the group consisting a quaternary cationic silicone, an aminophenyl-modified silicone, and a phenyl-modified silicone. The substance C is at least one of a silanol-containing polysiloxane and a fluorine-modified silicone. The average degree of roundness R1 of the toner particles is 0.890 or greater, if the degree of roundness is expressed as L0/L1, where L1 (?m) is a circumference of a profile view of a measured particle and L0 (?m) is the circumference of a perfect circle of a circumference of a profile view corresponding to the profile view of the measured particle.

Abstract: A black toner includes: toner mother particles containing carbon black as a colorant and a binder resin, the toner mother particles being surface-modified with a polyalkyleneimine.

Abstract: A liquid developer includes an insulating liquid and toner particles obtained by surface-modifying toner mother particles made of a material containing a rosin resin with a polyalkyleneimine.

Abstract: A process for producing a liquid developer includes: providing a dispersion liquid containing an aqueous dispersion medium and toner mother particles including a rosin resin; chemically modifying surfaces of the toner mother particles with an amine-based material by mixing the amine-based material with the dispersion liquid to obtain toner particles; and dispersing the toner particles in an insulating liquid.

Abstract: A liquid developer is provided. The liquid developer comprises an insulation liquid, toner particles dispersed in the insulation liquid, a dispersant dissolved in the insulation liquid; and a charge control agent dissolved in the insulation liquid. The charge control agent is represented by the following chemical formula (I): wherein in the chemical formula (I) R1 represents an alkyl group or alkenyl group having a carbon number in the range of 8 to 22, and R2 represents a hydroxyalkyl group. The liquid developer has both superior dispersibility and a charge characteristic of toner particles. Further, an image forming apparatus is also provided.

Abstract: The invention is to provide a toner with a small difference of charging properties and an excellent cleaning property. The toner includes toner particles of cylindrical bodies.

Abstract: A liquid developer contains a liquid insulator formed of a liquid hydrocarbon, toner particles formed by chemically modifying surfaces of mother toner particles formed of a material containing a rosin-based resin and a polyester resin with a polyalkyleneimine, and a metal soap dissolved in the liquid insulator.

Abstract: A liquid developer contains toner, a carrier liquid in which the toner are dispersed, and a graft copolymer of an acrylic polymer and a polysiloxane.

Abstract: A liquid developer includes an insulation liquid, toner particles dispersed in the insulation liquid, which at least a part of the surface of each of the toner particles contains a rosin resin and a dispersant improving dispersibility of the toner particles in the insulation liquid, which the dispersant is consisted of a material having a predetermined amine value. The liquid developer described above has superior positive charge property of toner particles and which has superior dispersibility of the toner particles for a long period of time. Further, an image forming apparatus that can suitably use such a liquid developer is also provided.