Konica Minolta Business Technologies, Inc.

Konica Minolta, Inc.

Yasuko Uchino

Tatsuya Nagase

Asao Matsushima

Aya Shirai

Michiyo Fujita

Ryuichi Hiramoto

Ikuko Sakurada

Natsuko Fujisaki

Tomomi Oshiba

Junya Onishi

Takaki Kawamura

Anju Hori

Junya Ueda

Satoshi Uchino

Shinya Obara

Yukio Hosoya

Kaori Matsushima

Saburou Hiraoka

Futoshi Kadonome

Mayuko Matsusaki

Makoto Nomiya

Hitomi Motani

Kazue Nakamura

It is an object to suppress yellowing of a binder resin while obtaining an image with a high degree of whiteness and to suppress occurrence of image defects when printing at a high temperature and a high humidity. A toner for developing an electrostatic image, the toner including: white toner base particles containing a binder resin and titanium oxide having an average particle size of from 130 to 600 nm; and an external additive including strontium titanate.

Toner for developing electrostatic image

A high quality image excellent in low-temperature fixability and good in color stability can be formed by an image forming method of the present invention. In the image forming method, an image is formed by an electrophotographic method using toners of plural colors. Each of the toners of the plural colors contains a crystalline resin, methanol concentrations (%) at transmittance of 50% obtained for methanol wettability evaluation of the toners of the plural colors all fall in a range of 15 to 60%, and assuming that a maximum value and a minimum value of the methanol concentrations (%) at transmittance of 50% obtained for the methanol wettability evaluation of the toners of the plural colors are respectively WH (%) and WL (%), a relationship of 4&#x2264;WH&#x2212;WL&#x2264;30 is satisfied.

Image forming method

An image forming method forms a color toner image and a white toner image using an image forming apparatus having a plurality of developing machines. The color toner image is formed using a color developer containing a first carrier and at least one color toner selected from a yellow toner, a magenta toner, and a cyan toner. The white toner image is formed using a white developer containing a second carrier and a white toner containing at least titanium oxide as a pigment. Formula (1):Iw&#x3c;Ic&#x2003;&#x2003;(1)is satisfied. Ic (&#x3bc;A) is a dynamic current value of the first carrier at 100 V and Iw (&#x3bc;A) is a dynamic current value of the second carrier at 100 V.

Image forming method, electrostatic charge image developer set, and image forming apparatus

Provided is an electrostatic latent image developing toner comprising toner matrix particles that comprise resin components comprising a vinyl resin as a main component and a crystalline resin, and a mold release agent. The electrostatic latent image developing toner includes a structural body in which a portion of the crystalline resin is in contact with the mold release agent, and a portion of the crystalline resin having a thread-like structure that is not in contact with the mold release agent, in cross-sections of the toner matrix particles.

Electrostatic latent image developing toner

An image forming method includes: charging a surface of an electrostatic latent image holder with a charging roller; exposing the charged surface so as to form an electrostatic latent image; and developing the formed electrostatic latent image with toner. The toner contains at least a toner base particle and an external additive minute particle. The external additive minute particle contains a silica-polymer composite minute particle. A silicon atom abundance ratio obtained from abundances of a carbon atom, an oxygen atom and a silicon atom present on an outermost surface and within 3 nm from the outermost surface in a depth direction of the silica-polymer composite minute particle are measured with an x-ray photoelectron spectrometer satisfies at least the following condition A.15.0 atm %&#x2266;silicon atom abundance ratio ({Si/(C+O+Si)}&#xd7;100)&#x2266;30.0 atm %&#x2003;&#x2003;[Condition A]

The invention provides an image formation method, a toner set, and a white toner, by which a masking function of an image layer formed by a white toner on a recording medium can be developed efficiently, and low temperature fixability can be improved. An image formation method for fixing an image forming layer (A) to be formed using a white toner, and an image forming layer (B) to be formed adjacent to the image forming layer (A) using a toner different from the white toner on a recording medium; wherein the following relational expressions (1) and (2) are satisfied:1.000&#x3c;&#x3c;1.300&#x2003;&#x2003; (1);and1.000&#x3c;&#x3c;1.060&#x2003;&#x2003;(2).

Image formation method, toner set, and white toner

A toner for electrostatic latent image development of the present invention includes toner particles containing toner mother particles and an external additive. The external additive contains fatty acid metal salt particles, and a volume based particle diameter (size) distribution of the fatty acid metal salt particles has two peaks on a side of smaller size and a side of larger size, respectively. A volume based mean particle diameter of the fatty acid metal salt particles having the peak on the side of smaller size is 3.0 &#x3bc;m or smaller and a volume based mean particle diameter of the fatty acid metal salt particles having the peak on the side of larger size is larger than a volume based mean particle diameter of the toner mother particles.

Electrostatic latent image developing toner, production method of the toner for electrostatic latent image development and electrophotographic image formation method

A foil transferring method employing an electrophotography is disclosed, in which a toner used for forming a foil transferring layer contains at least a vinyl based resin and a polyester based resin as a binder resin and an amount of the vinyl based resin is 50 to 95% by weight based on the total amount of the binder resin.

Foil transferring method and toner for forming foil transferring layer

A method of forming an image comprising the steps of: forming an image on an image support to obtain an original image, and forming a gloss adjusting layer comprising a clear toner-fixed image comprising a clear toner on the original image, wherein the gloss adjusting layer comprises an aggregate of gloss adjusting units, wherein the gloss adjusting units each comprise a section where the clear toner is attached and a section where the clear toner is unattached, wherein a borderline between the section where the clear toner is attached and the section where the clear toner is unattached comprises a straight line.

Image forming method and image forming apparatus

Provided are an image forming method by which an image in which arbitrary glossiness is adjusted to any section is formed, and an image forming apparatus thereof. It is a feature that an image forming method possesses the steps of forming a gloss adjusting layer possessing a gloss adjusting toner-fixed image formed with a gloss adjusting toner, on an image support, and forming a toner-fixed image obtained from a toner, on the gloss adjusting layer, wherein the gloss adjusting layer possesses an aggregate of gloss adjusting units; the gloss adjusting units each possess a section where the gloss adjusting toner is attached and another section where the gloss adjusting toner is unattached; and a borderline between the section and the another section is a straight line.

The image forming method including steps of forming a clear toner layer on a photoreceptor, transferring the clear toner layer onto a transfer member, transferring the clear toner layer on the transfer member onto an image support, heating the image support having the clear toner layer, bringing the clear toner layer into close contact with a belt to cool the image support, and separating the image support from the belt are provided, in this order; and the clear toner layer is formed with a plurality of independent linear protrusion portions and the independent linear protrusion portions are formed parallel or diagonally to the conveyance direction of an image support.

Provided is an image forming method in which a foil image exhibiting excellent finish without any wrinkle and strong adhesive strength is formed on a foil transferring face made of toner. The image forming method for transferring the transfer foil on the foil transferring face is conducted by contacting the transfer foil to the foil transferring face formed by using toner having a glass transition temperature of not more than 60&#xb0; C., and by passing through a nip portion formed between a driving roller and a follower roller.

Provided is a method for producing a print having a toner image and a foil image, the method containing the steps of forming a foil transferring toner image with a foil transferring toner on an image supporting substrate produced; heating and pressing by laminating the foil transferring toner image onto a transferring foil layer of a transferring foil sheet which is composed of the transferring foil layer and a base film; forming a foil image having the transferring foil layer on the foil transferring toner image by peeling off the base film after cooling the foil transferring toner image with the transferring foil layer; and forming a toner image with an image forming toner on the image supporting substrate having the foil transferring image, wherein the foil transferring toner contains a resin produced by a vinyl monomer represented by Formula (1) and a polyvalent metal compound: 

Method for producing print having foil image and toner image

Provided is a method for forming an image containing the sequential steps of: forming a foil adhesion toner image on an image supporting substrate with a foil adhesion toner (&#x3b1;) which comprises at least a binder resin containing a thermoplastic resin using an electrophotographic method; forming a foil image on the foil adhesion toner image by contacting a transfer foil on the foil adhesion toner image with applying heat; and forming a visible toner image on the image supporting substrate which has been formed with the foil image with at least one image forming toner (&#x3b2;) using an electrophotographic method, followed by fixing the visible toner image by applying heat and pressure thereto, wherein &#x394;(Tsp(&#x3b1;)&#x2212;Tsp(&#x3b2;)) is 5 to 50&#xb0; C., provided that Tsp (&#x3b1;) is a softening point of the foil adhesion toner (&#x3b1;) and Tsp (&#x3b2;) is a softening point of the image forming toner (&#x3b2;).

A method for forming an image at least comprising steps of forming an electrostatic latent image by exposing an electrophotographic photoreceptor, forming a foil transferring face by supplying a toner onto the electrophotographic photoreceptor having the electrostatic latent image, transferring the foil transferring face formed on the electrophotographic photoreceptor to a base substance, fixing the foil transferring face transferred on the base substance, supplying a transfer foil to the base substance fixed with the foil transferring face, adhering the transfer foil onto the foil transferring face by heating under a condition of contacting the transfer foil with the foil transferring face; and removing the transfer foil from the base substance while leaving the foil adhered onto the foil transferring face, wherein the toner comprises a binder resin having a softening temperature in the range of from not less than 105&#xb0; C. to not more than 140&#xb0; C., and having a molecular weight of not less than 60,000 in a ratio of not less than 10% and not more than 30% based on the total binder resin constituting the toner.

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Tokyo, Japan

Yasuko Uchino