Abstract: The present invention relates to a toner for developing electrostatic images characterized in that a reactive polymer which cross-links when heated at a temperature higher than a maximum temperature at the preparation of the toner for developing electrostatic images, at image fixation and/or after fixation, is contained in a toner for developing electrostatic images containing at least a binder resin, and/or is added to the surface thereof.

Abstract: The present invention discloses a color toner providing highly gloss image and documents with excellent long term storability; an electrostatic latent image developer; and an image forming method. Disclosed is a color toner comprising a binder resin and colorant, wherein the weight average molecular weight of the binder resin is from 6000 to 45000, the toner's glass transition temperature (Tg) is from 40 to 70° C., the loss tangent tan ? of dynamic viscoelasticity is from 0.1 to 2.5 in the temperature of from the toner's glass transition temperature (Tg) to the temperature at which the loss modulus (G?) is 1×105 Pa, and the toner comprises 3 to 20% by mass of an ester derivative of an alicyclic compound having 1 or more carboxyl groups, and an electrostatic latent image developer and an image forming method, which use the color toner.

Abstract: The present invention provides an image forming method comprising the steps of forming an electrostatic latent image on a surface of an electrostatic latent image bearing body, forming a toner image by developing the electrostatic latent image by using a toner, transferring the toner image to the surface of a recording medium, and fusing the transferred toner image on the surface of the recording medium by bringing the toner image into contact with a heating medium, which has a resin coating layer formed on the surface thereof, and thereby melting the toner image. The toner contains a binder resin containing monomers having vinyl double bonds. A storage elasticity of the toner at 180° C. is in a range of 1×103 to 8×103 Pa and a contact angle of the surface of the heating medium to water at 25° C. is in a range of 50 to 100°.

Abstract: The present invention provides an electrophotographic toner comprising at least a binder resin and a near-infrared light absorbing material containing inorganic material particles, wherein the rate of absorption in the visible region of the electrophotographic toner is 15% or less and the average dispersion diameter of the near-infrared light absorbing material is in a range from 50 nm to 800 nm. The invention also provides an electrophotographic developer comprising the above photographic toner and a carrier. Further, the invention provides an image forming method using the above electrophotographic toner.

Abstract: The present invention provides an electrophotographic toner comprising at least a binder resin and a near-infrared light absorbing material containing inorganic material particles, wherein the rate of absorption in the visible region of the electrophotographic toner is 15% or less and the average dispersion diameter of the near-infrared light absorbing material is in a range from 50 nm to 800 nm. The invention also provides an electrophotographic developer comprising the above photographic toner and a carrier. Further, the invention provides an image forming method using the above electrophotographic toner.

Abstract: An image forming apparatus is capable of performing image formation at a processing speed of not lower than 150 mm/s. An electrophotographic photoreceptor comprises a surface layer containing a siloxane-bases resin having charge-transporting properties and a crosslinked structure. A cleaning device comprises a brush member disposed such that the leading end of said brush comes in contact with said electrophotographic photoreceptor. The product (Rz×We) of the surface roughness (Rz [?m]) of said electrophotographic photoreceptor after 200,000 rotations thereof and the wear rate of said electrophotographic photoreceptor per 1,000 rotations (We [nm]) is not greater than 20.

Abstract: The present invention discloses a color toner providing highly gloss image and documents with excellent long term storability; an electrostatic latent image developer; and an image forming method. Disclosed is a color toner comprising a binder resin and colorant, wherein the weight average molecular weight of the binder resin is from 6000 to 45000, the toner's glass transition temperature (Tg) is from 40 to 70° C., the loss tangent tan ? of dynamic viscoelasticity is from 0.1 to 2.5 in the temperature of from the toner's glass transition temperature (Tg) to the temperature at which the loss modulus (G?) is 1×105 Pa, and the toner comprises 3 to 20% by mass of an ester derivative of an alicyclic compound having 1 or more carboxyl groups, and an electrostatic latent image developer and an image forming method, which use the color toner.

Abstract: The present invention discloses a color toner providing highly gloss image and documents with excellent long term storability; an electrostatic latent image developer; and an image forming method. Disclosed is a color toner comprising a binder resin and colorant, wherein the weight average molecular weight of the binder resin is from 6000 to 45000, the toner's glass transition temperature (Tg) is from 40 to 70° C., the loss tangent tan ? of dynamic viscoelasticity is from 0.1 to 2.5 in the temperature of from the toner's glass transition temperature (Tg) to the temperature at which the loss modulus (G?) is 1×105 Pa, and the toner comprises 3 to 20% by mass of an ester derivative of an alicyclic compound having 1 or more carboxyl groups, and an electrostatic latent image developer and an image forming method, which use the color toner.

Abstract: A magenta toner for developing electrostatic images provided which contains a binder resin and a colorant, wherein the colorant includes a mixed crystal of two or more colorants and when a solid patch is fixed on art paper complying with the ISO standard by using this toner, a resulting fixed image color satisfies at least one of the following formulae (b*)<0.85 (a*)?67.92; and (b*)>?7.94(a*)+591.85. The color difference ?E between the color of the fixed image and the color characterized by L*: 46.6, a*: 75.1 and b*: ?4.4 is preferably less than 6. The colorant is preferably a mixed crystal of a quinacridone colorant and a monoazo colorant. Moreover, the invention provides a method for producing the magenta toner, a developer containing the magenta toner, and an image-forming method using the magenta toner.

Abstract: The present invention provides a toner for electrophotography comprising a binder resin, a coloring agent and a release agent, wherein the toner has a storage modulus G? of 5.0×102 to 1.0×105 Pa at 180° C. and an adhesive force to an aluminum substrate of not more than 50 N/m at 180° C. The invention also provides an image-forming method, which includes charging a surface of an image-bearing body; forming an electrostatic latent image according to image information on the charged surface of the image-bearing body; developing the electrostatic latent image formed on the surface of the image-bearing body with the toner to provide a toner image; transferring the toner image formed on the surface of the image-bearing body to a surface of a recording medium, and fusing the toner image transferred on the surface of the recording medium.

Abstract: The present invention provides an image forming method comprising the steps of forming an electrostatic latent image on a surface of an electrostatic latent image bearing body, forming a toner image by developing the electrostatic latent image by using a toner, transferring the toner image to the surface of a recording medium, and fusing the transferred toner image on the surface of the recording medium by bringing the toner image into contact with a heating medium, which has a resin coating layer formed on the surface thereof, and thereby melting the toner image. The toner contains a binder resin containing monomers having vinyl double bonds. A storage elasticity of the toner at 180° C. is in a range of 1×103 to 8×103 Pa and a contact angle of the surface of the heating medium to water at 25° C. is in a range of 50 to 100°.

Abstract: The present invention provides: a toner for developing electrostatic images including as a main component thereof a binder resin having a copolymer comprised of a combination of a high Tg monomer having a structure represented by the following structural formula (1) and a glass transition temperature of 50° C. or higher, a low Tg monomer having a structure represented by the following structural formula (2) and a glass transition temperature of lower than 50° C., and a hydrophilic monomer having a structure represented by the following structural formula (3); a process for preparing the toner for developing electrostatic images; a developer for developing electrostatic images containing the toner; and an image forming method using the toner.

Abstract: The present invention relates to an image forming method wherein the surface of an electrophotographic photoreceptor contains a compound having an unsaturated double bond, a toner for electrostatic latent image development has a binder resin obtained by polymerizing a polymerizable monomer having a vinyl double bond, has at least one kind of metal oxide particles and/or metal nitride particles on the surface of the toner and has a shape factor SF1 of 110 to 140, and the storage of elastic modulus at 160° C. (G′(160)) of the toner for electrostatic latent image development is in a predetermined range.

Abstract: The present invention provides a toner, comprising a binder resin and a colorant, and having a plurality of absorption peaks in a wave number range of 400 to 4,000 cm−1 in an infrared absorption spectrum, wherein among the plurality of absorption peaks, a maximum absorption peak appears at wave number ranging from 500 to 800 cm−1 and, given that the intensity of the maximum absorption peak is P1 and that the intensity of a second greatest absorption peak is P2, P1 and P2 satisfy the following equation (1), a developer comprising this toner, an image forming method using this toner, and an image forming apparatus using this toner.

Abstract: An electrophotographic developer is provided for realizing high-quality images and superior reproducibility of laser dots in a low coverage region and reduced unevenness of color in halftone solid images. The electrophotographic developer includes a toner and a carrier. The toner has a shape factor of 140 or less and a volume average particle size distribution GSDv of 1.3 or less. The carrier has a coat resin layer on a core material, the coat resin layer containing a conductive powder. The core material has a dynamic electric resistivity of 1 &OHgr;·cm or less under an electric field of 104 V/cm in a form of a magnetic brush. The conductive powder has an electric resistivity of 101 &OHgr;·cm or greater and 106 &OHgr;·cm or less. The carrier has an electric resistivity in a range between 10 and 1×108 &OHgr;·cm. An image forming method is also provided wherein the electrophotographic developer is used for development in a developing stage.

Abstract: An image forming apparatus comprising: an electrophotographic photoreceptor having an electrically-conductive support and a photosensitive layer provided on said support; an electrostatic charging unit for electrostatically charging said electrophotographic photoreceptor; an exposing unit for exposing said electrostatically charged electrophotographic photoreceptor to light to form an electrostatic latent image; a developing unit for developing said electrostatic latent image with a toner to form a toner image; a transferring unit for transferring said toner image onto a transferring medium; and a cleaning device for removing a toner left on said electrophotographic photoreceptor after the transfer of said toner image, wherein said image forming apparatus is capable of performing image formation at a processing speed of not lower than 150 mm/s, wherein said electrophotographic photoreceptor comprises a surface layer containing a siloxane-based resin having charge-transporting properties and a crosslinked stru

Abstract: The present invention discloses a color toner providing highly gloss image and documents with excellent long term storability; an electrostatic latent image developer; and an image forming method. Disclosed is a color toner comprising a binder resin and colorant, wherein the weight average molecular weight of the binder resin is from 6000 to 45000, the toner's glass transition temperature (Tg) is from 40 to 70° C., the loss tangent tan &dgr; of dynamic viscoelasticity is from 0.1 to 2.5 in the temperature of from the toner's glass transition temperature (Tg) to the temperature at which the loss modulus (G″) is 1×105 Pa, and the toner comprises 3 to 20% by mass of an ester derivative of an alicyclic compound having 1 or more carboxyl groups, and an electrostatic latent image developer and an image forming method, which use the color toner.

Abstract: The present invention relates to a toner for developing electrostatic images characterized in that a reactive polymer which cross-links when heated at a temperature higher than a maximum temperature at the preparation of the toner for developing electrostatic images, at image fixation and/or after fixation, is contained in a toner for developing electrostatic images containing at least a binder resin, and/or is added to the surface thereof.

Abstract: The present invention provides a toner containing toner particles having a weight average molecular weight of 20,000 to 35,000. The toner is characterized in that upon using the toner to produce a 4.0 g/m2 solid portion on a paper having a basis weight of 104 g/m2, contacting the solid portion with a heating member of an image fixing device for 40 ms, and thereby fixing the solid portion on the paper, Gt(190)≧35% given that a glossiness of the solid portion when fixed at 190° C. according to JIS Z8741:97 is defined to be Gt(190), and 0.8≦Gt(180)/Gt(190)≦1.2 given that a glossiness of the solid portion when fixed at 180° C. is defined to be Gt(180).

Abstract: The present invention provides an electrophotographic toner comprising at least a binder resin and a near-infrared light absorbing material containing inorganic material particles, wherein the rate of absorption in the visible region of the electrophotographic toner is 15% or less and the average dispersion diameter of the near-infrared light absorbing material is in a range from 50 nm to 800 nm. The invention also provides an electrophotographic developer comprising the above photographic toner and a carrier. Further, the invention provides an image forming method using the above electrophotographic toner.