Konica Corporation

Konica Minolta Business Technologies, Inc.

Konishiroku Photo Industry Co., Ltd.

Konica-minolta Holdings, Inc.

Naohiro Hirose

Ken Ohmura

Asao Matsushima

Shiro Hirano

Meizo Shirose

Hiroshi Yamazaki

Akira Kinoshita

Osamu Sasaki

Tomoe Kitani

Yoshiki Nishimori

Kenji Hayashi

Tatsuya Nagase

Kazumasa Watanabe

Hiroyuki Yasukawa

Kiyoshi Sawada

Akihiko Itami

Kaori Soeda

Yoshio Takizawa

Natsuko Kusaka

Mikio Kohyama

Shinichi Suzuki

Shinya Obara

Miyuki Murakami

Yoshiyasu Matsumoto

Tatsuya Fujisaki

Takao Yamanouchi

Yohei Ohno

Tomoe Kikuchi

Mikio Koyama

Hirofumi Hayata

Takeo Oshiba

Satoru Ikeuchi

Syozo Mitsui

Tsutomu Iwamoto

Youhei Ohno

Kazumasa Watanable

Naoto Abew

Provided is a full color image forming method wherein high color reproducibility especially on a blue system and a green system can be obtained and an excellent gradation property can be obtained in a full color image to be obtained. The full color image forming method for forming a full color image by using at least yellow toner, magenta toner, and two kinds of cyan toners (1, 2) is characterized in that a toner image formed by the cyan toner (1) alone has the value of the maximum color saturation (C*) of not less than 50 and the value of lightness (L*) in a color space represented by an L*a*b* colorimetric system of not less than 30 and not more than 52, and that a toner image formed by the cyan toner (2) alone has the value of the maximum color saturation (C*) of not less than 50 and the value of the lightness (L*) in the color space represented by the L*a*b* colorimetric system of not less than 58 and not more than 75.

Full color image forming method using two cyan toners

Provided is a toner for an electrostatic charge image development having toner particles which contain: a binder resin; a colorant; and a compound represented by Formula (1) in an amount of 0.1 to 65 ppm based on the total weight of the toner particles: 

Toner for electrostatic charge image development and method for producing the same

Provided is a toner comprising toner particles containing a binder resin and coloring matters, wherein the coloring matters comprise a dye represented by Formula (X-1), a metal compound represented by Formula (1) and a quinacridone pigment represented by Formula (2): 

Electrophotographic toner

A cyan ink for inkjet recording comprising at least one of a phthalocyanine compound represented by Formula (1) and a phthalocyanine compound represented by Formula (2), Z being represented by Formula (3): 

Cyan ink for inkjet recording

A set of toners comprising a yellow toner, a magenta toner, a cyan toner and a black toner for forming a full color image with an electrophotographic method, wherein the yellow toner comprises toner particles containing at least one pigment selected from the group consisting of C.I. Pigment Yellow 74, C.I. Pigment Yellow 139, C.I. Pigment Yellow 155, C.I. Pigment Yellow 180 and C.I. Pigment Yellow 185; the magenta toner comprises toner particles containing a dye represented by Formula (X-1) and a metal compound represented by Formula (1); and the cyan toner comprises toner particles containing a silicon phthalocyanine represented by Formula (2): 

An electrostatic latent image developing toner comprising at least a resin, a wax and a colorant, wherein the wax comprises 40 to 98% by mass of a first release agent comprising an ester wax and 2 to 60% by mass of a second release agent comprising a hydrocarbon having at least one of a branched chain structure and a cyclic structure; and the colorant comprises a silicon phthalocyanine represented by Formula (I): 

Electrostatic latent image developing toner and method of image forming

Provided is a set of toners comprising a yellow toner, a magenta toner, a cyan toner and a black toner for forming a full color image with an electrophotographic method, wherein the yellow toner comprises toner particles containing at east one pigment selected from the group consisting of C. I. Pigment Yellow 74, C. I. Pigment Yellow 139, C. I. Pigment Yellow 180, C. I. Pigment Yellow 185 and C. I. Pigment Yellow 155; the magenta toner comprises toner particles containing a rhodamine based dye represented at least by Formula (1) and Formula (2), and the cyan toner comprises toner particles containing a phthalocyanine based dye represented by Formula (5): 

Electrophotographic toner set

Disclosed is a method for forming color image, in which one of the yellow, magenta, cyan and black toners is a high water content toner, and one of the yellow, magenta, cyan and black toners is a toner low water content toner, water content of the high water content toner is 1.2 to 2.5% by weight based on the high water content toner, and water content of the low water content toner is 0.1 to 1.2% by weight based on the low water content toner.

Image forming method

A toner for electrostatic latent image development contains a toner particle having a median diameter (d50) in number standard of 2.5 &#x3bc;m to 7.5 &#x3bc;m, acrylate of less than 12 ppm and aliphatic alcohol of 4 to 12 carbons of 40 ppm to 300 ppm.

Toner for electrostatic latent image development and manufacturing method of the toner for electrostatic latent image development

A toner production method includes the step of: controlling a shape of toner particles in a shape controlling region to control the shape of toner particles in a water based medium, wherein the shape controlling region has a toner channel for the toner particles and a temperature controller capable of controlling at least two zones.

Toner production method and toner production apparatus

A toner for developing an electrostatic image is disclosed. The arithmetic average of shape coefficient SF-1 of the toner particles calculated by Equation 1 is from 125 to 170 and a ratio of that to an arithmetic average of the shape coefficient SF-2 of the toner particles calculated by Equation 2, SF-1/SF-2, is from 1.10 to 1.52 and the ratio of the toner particles having a circle corresponding diameter measured by a flow particle image analyzer of from not less than 0.60 to less than 1.00 &#x3bc;m is not more than 5.0% in number. The image forming methods employing the toner are also disclosed.

Toner for forming electrostatic image

A toner for electrostatic latent image development includes a coloring agent and a resin wherein the toner is formed by a polymerization method and a content of aromatic amine contained in the toner is 50 ppm or less, and a volume average particle size of the toner is 3 to 8 &#x3bc;m; and an image forming method employs the same toner.

Toner for electrostatic latent image development and image forming method

An image forming method for forming a full color toner image by overlaying four color electrostatic image developing toners of black, yellow, magenta and cyan, wherein at least one of the four color electrostatic image developing toners is a toner containing a large diameter external additive in a larger amount and at least one is a toner containing the large diameter external additive in a smaller amount, in which the primary particle diameter of the large diameter external additive is from 150 nm to 2,000 nm, the content of the large diameter external additive in the toner containing the large diameter external additive in larger amount is from 0.06% by weight to 4.0% by weight and the content of the large diameter external additive in the toner containing the large diameter external additive in the smaller amount is not more than 0.05% by weight.

An image forming method comprises: fixing an image formed by a toner on a record sheet in a nip member formed by a pressurizing member which is compressibly contacted against a heating fixing rotor having an elastic body layer formed on an endless periphery surface capable of orbitally moving and which creates locally a large distortion occurred in the elastic body layer in vicinity of outlet thereof,

The toner for developing an electrostatic image, includes a toner particle containing a binder resin and a colorant. The colorant has Feret's average horizontal diameter from 10 nm to 500 nm, and 50 number % or more of colorant has a Feret's horizontal diameter of from 2 nm to 300 nm. The colorant contains a compound represented by General Formula (1): 

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Hachioji, Japan

Naohiro Hirose