Abstract: There is provided a toner for developing an electrostatic charge image including a binder resin, a colorant and a releasing agent, wherein the content ratio of particles having a number particle diameter of 4.5 ?m or more and less than 7.5 ?m and a circularity degree of 0.980 or more is in a range from about 5 number % to about 15 number %, and the content ratio of particles having a number particle diameter of not 7.5 ?m or more and less than 15 ?m and a circularity degree of 0.900 or more and less than 0.940 is about 5 number % or less.

Abstract: There is provided an electrophotographic toner, which includes a binder resin and a colorant, wherein, with a total intensity (kcps) of all elements detected in the toner due to fluorescent X-ray measurement designated as A and an intensity of nitrogen designated as B, B/A is from about 0.01 to about 0.5, and a ratio of nitrogen measured by X-ray photoelectron spectrometry after ion etching at an accelerating voltage of 10 mV for 180 seconds is from about 0.1 atom % to about 7.5 atom %.

Abstract: A toner for development of an electrostatic image includes at least a crystalline polyester resin and a colorant. The toner shows a dielectric loss index ?? of 0.1 or less at 0.1 Hz and 500 V at 30° C. and 90% RH.

Abstract: The present invention provides a toner having a releasing agent, a binder resin and a colorant. The binder resin is contained in a form of particles, surfaces of which have 1.2 times or greater amount of a polar group-containing compound, or of a cross-linked compound, than insides thereof. A viscosity of the releasing agent, as determined by using a type-E viscometer provided with a cone plate having a cone angle of 1.34 degrees at 140° C., is 1.5 to 5.0 mPa·S. The present invention further provides a developer containing a carrier and the toner. The present invention further provides an image forming method that utilizes the developer.

Abstract: A toner for electrostatic image development comprising a binder resin and a colorant, the toner having a content of an aluminum element with respect to carbon of approximately 0.005 atm % to approximately 0.02 atm % as measured by X-ray photo-electron spectroscopy.

Abstract: The present invention provides a toner for electrostatically charged image development comprising at least a binder resin, a colorant and a releasing agent. The releasing agent satisfies the following equations (1) and (2): 0.1??*a?1.0??(1) 1.1??*b/?*a?3.5??(2) wherein ?*a represents a complex viscosity (Pa·s) determined from a first dynamic viscoelasticity measurement at a measuring frequency of the releasing agent of 6.28 rad/s, ?*b represents a complex viscosity (Pa·s) determined from a second dynamic viscoelasticity measurement at a measuring frequency of the releasing agent of 62.8 rad/s, and each of the first and second dynamic viscoelasticities is measured in a temperature range from a temperature that is 15° C. lower than the melting point of the releasing agent to a temperature that is 15° C. higher than the melting point of the releasing agent.

Abstract: The present invention provides a toner having a releasing agent, a binder resin and a colorant. The binder resin is contained in a form of particles, surfaces of which have 1.2 times or greater amount of a polar group-containing compound, or of a cross-linked compound, than insides thereof. A viscosity of the releasing agent, as determined by using a type-E viscometer provided with a cone plate having a cone angle of 1.34 degrees at 140° C., is 1.5 to 5.0 mPa·S. The present invention further provides a developer containing a carrier and the toner. The present invention further provides an image forming method that utilizes the developer.

Abstract: The present invention provides a toner for electrostatically charged image development comprising at least a binder resin, a colorant and a releasing agent. The releasing agent satisfies the following equations (1) and (2): 0.1??*a?1.0??(1) 1.1??*b/?*a?3.5??(2) wherein ?*a represents a complex viscosity (Pa·s) determined from a first dynamic viscoelasticity measurement at a measuring frequency of the releasing agent of 6.28 rad/s, ?*b represents a complex viscosity (Pa·) determined from a second dynamic viscoelasticity measurement at a measuring frequency of the releasing agent of 62.8 rad/s, and each of the first and second dynamic viscoelasticities is measured in a temperature range from a temperature that is 15° C. lower than the melting point of the releasing agent to a temperature that is 15° C. higher than the melting point of the releasing agent.