Abstract: A toner for developing an electrostatic latent image, wherein in regard to the molecular weight by GPC of the THF dissolved components of the toner, the ratio of at least 5×105 in the integral molecular weight distribution is not higher than 1% by weight, the ratio of not higher than 3×103 is not higher than 30% by weight, and the ratio {W(5×103)/W(1×105)} of the ratio {W(5×103)} of not higher than 5×103 to the ratio {W(1×105)} of at least 1×105 is from 15 to 50. Also, the molecular weight by GPC of the THF dissolved components of the toner is distributed in the range of not larger than 1×106, the value of the differential molecular weight distribution of the molecular weight of 5×103 is not larger than 0.55%, and the value of the differential molecular weight distribution of the molecular weight of 1×105 is not larger than 0.15%.

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 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 &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 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: A toner for developing an electrostatic image and a process for producing the same, a developer for developing an electrostatic image, and a process for producing an image are provided. The toner contains a colorant and a binder resin, and also contains a polyolefin resin containing a polar group and having a glass transition point of 20° C. or less and a weight average molecular weight of 10,000 or more.

Abstract: A magenta toner for electrophotography includes a binder resin and a colorant, wherein the toner contains at least a naphthol pigment having a structure represented by the following general formula (1) as the colorant, and has a shape factor SF1 of 110 to 140 obtained by the equation below and a volume average particle size of 2 to 9 &mgr;m: 1

Abstract: A toner for developing an electrostatic latent image is provided that can prevent occurrence of blister even with coated paper having a coated surface, exhibits excellent releasing performance in oilless fixing, and realizes both high glossiness and OHP transparency for an image to be formed. A process for producing the toner, a developer containing the toner, and a process for forming an image using the toner are also provided. The toner for developing an electrostatic latent image contains a binder resin, a releasing agent and a colorant, in which the binder resin has a number average molecular weight (Mn) in a range of from 9,000 to 18,000 and a molecular weight distribution represented by a ratio (Mw/Mn) of a weight average molecular weight (Mw) and a number average molecular weight (Mn) of 2.5 or less, and the binder resin contains a vinyl resin.

Abstract: The present invention relates to a method of forming images. The method includes the steps of forming electrostatic latent images on an electrostatic image carrier, forming toner images with a toner-containing developer by developing the electrostatic latent images on the electrostatic image carrier, transferring the toner images onto a transfer material, and thermally fixing the toner images, wherein an electrophotographic toner including containing at least a binder resin, a colorant, and a releasing agent in the range of 10 to 25% by mass relative to toner particles and having a shape factor SF1 of 140 or less is used as the toner, and the thermal fixing step is carried out so as to satisfy, at a process speed of at least 170 mm/sec., the relationship (A): 200<0.7×&agr;+2000×&bgr; wherein &agr; is a fixing temperature (° C.), &bgr; is a heating time (second), and &agr; is 160° C. or higher.

Abstract: Such a toner for developing an electrostatic image is to be provided that has a wide fixable temperature range, is excellent in development and transfer performance and excellent in releasing performance, realizes both glossiness and transparency, and is capable of providing an image (particularly a color image) of a wide color reproduction range having high quality and high durability, a developer for an electrostatic image, and a process for forming an image. The toner for developing an electrostatic image contains a binder resin, a colorant and an inorganic metallic salt, and an amount of a toluene insoluble component (provided that the colorant, a releasing agent and inorganic and organic insoluble particles are excluded therefrom) is from 0.5 to 10% by weight. The developer for an electrostatic image and the process for forming an image use the toner for developing an electrostatic image.

Abstract: A toner for developing an electrostatic latent image contains a binder resin, a colorant, a wax, and inorganic fine particles. The toner contains the inorganic fine particles content in the range from 1 to 10% by weight, the temperature at which the complex viscosity &eegr;° of the toner in the case of measuring at a frequency of 100 rad/second shows 1000 Pa.s ranges from 125 to 145° C., and the temperature at which the complex viscosity &eegr;° of the toner in the case of measuring at a frequency of 100 rad/second shows 100 Pa.s ranges from 180 to 210° C.

Abstract: There is provided an electrostatic charge image developing toner comprising at least a binder resin, a coloring agent, and an aromatic hydrocarbon copolymer resin, wherein, in a toner particle, the percentage of dispersed aromatic hydrocarbon copolymer resin particles having a longitudinal diameter of 2.0 .mu.m or greater among the total number of dispersed aromatic hydrocarbon copolymer is 10% or less. The toner has superior effects of excellent grindability and not melting and adhering to apparatuses, without there being any adverse effect on basic abilities of the toner such as electrostatic charge property, fixing property, color, and the like.

Abstract: An electrostatic-image developer which comprises: (i) a toner comprising: (a) toner particles containing carbon black in an amount of from 6 to 8% by weight based on the weight of the toner particles and having a volume-average particle diameter of from 3 to 9 .mu.m; and (b) an external additive; and (ii) a resin-coated carrier having a volume resistivity of from 10.sup.7 to 10.sup.11 .OMEGA..multidot.cm in an electric field of 10.sup.3.8 V/cm and an average particle diameter of from 30 to 60 .mu.m. Also disclosed are a process for forming a black image and a process for forming a full-color image each using the electrostatic-image developer.