Fuji Xerox Co., Ltd.

Seijirou Ishimaru

Yasushige Nakamura

Tomoaki Tanaka

Yoshimichi Katagiri

Masahisa Ochiai

Sadaaki Yoshida

Yasuyuki Furuse

The present invention provides a toner for developing an electrostatic latent image comprising a releasing agent containing a hydrocarbon, a binder resin, and a colorant, wherein, when an average carbon number of the hydrocarbon is designated as N, the hydrocarbon contains components having a carbon number in the range of (N&#x2212;10) to (N+10) in an amount of 70% by mass or more in the entire hydrocarbon and has a weight-average molecular weight of 12,000 or more and 25,000 or less, a developer for developing an electrostatic latent image containing the toner for developing an electrostatic latent image, and an image-forming process using the toner for developing an electrostatic latent image.

Toner for developing electrostatic latent image, developer for developing electrostatic latent image, and image-forming process using the toner for developing electrostatic latent image

A magnetic black toner for electrophotography comprising a binding resin, a magnetic substance, and a pigment, wherein the pigment is at least one of phthalocyanine pigment and Mn containing hematite, and the content ratio of the magnetic substance and the pigment in the toner satisfy the following formulae: 10&#x2266;A&#x2266;30, 0.1&#x2266;B&#x2266;3, 5&#x2266;C&#x2266;40, wherein A denotes the content ratio (mass %) of the magnetic substance in the toner, B denotes the content ratio (mass %) of the phthalocyanine pigment in the toner, and C denotes the content ratio (mass %) of the Mn containing hematite in the toner.

Magnetic black toner for electrophotography having Mn-containing hematite compound and magnetic two-component developer for electrophotography containing the same

This invention relates to image formation toner, 2-component developer, image formation method and method for manufacturing image formation toner, for preventing clogging of the filter. Toner is used in which the ratio of the component measured by GPC to have a molecular weight between 500 to 1000 is 10 parts by weight or less with respect to 100 parts by weight of the entire toner. Since the case of clogging of the HEPA filter is the 500 to 1000 molecular weight component, clogging of the filter is prevented by reducing this component.

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Kanagawa, Japan

Seijirou Ishimaru