Konica Minolta, Inc.

Ami Motohashi

Takaki Kawamura

Shiro Hirano

Junya Onishi

Natsuki Ito

Yusuke Takigaura

Hiroshi Nagasawa

Noboru Ueda

Tatsuya Fujisaki

Kentarou Mogi

A toner set includes a plurality of toners, wherein the toner set includes a first toner containing a yellow colorant and a second toner containing a cyan colorant, the first toner and the second toner each contain a binder resin containing a vinyl-based resin and a crystalline resin, and a release agent containing a hydrocarbon wax, a content of the vinyl-based resin with respect to a total mass of the binder resin is 50% by mass or more, the first toner contains the crystalline resin having a moiety having a crystal structure and a crystal nucleating agent moiety having a crystal nucleating agent, and the second toner contains the cyan colorant that is a compound represented by general formula (1).

Toner set and image forming method

An object of the present invention is to provide an image forming method capable of coating a photocurable varnish without unevenness on a toner image formed using an electrostatic latent image developing toner, and further having good adhesion between a varnish layer and the toner image. The image forming method of the present invention comprises: forming a toner image on a recording medium using an electrostatic latent image developing toner containing a toner particle comprising a binder resin and a release agent; and forming a varnish layer on the toner image by applying and curing a photocurable varnish comprising a photocurable compound. The binder resin comprised in the electrostatic latent image developing toner contains a crystalline polyester resin. The photocurable compound comprised in the photocurable varnish comprises a diol di(meth)acrylate having a straight hydrocarbon chain.

Image forming method

Provided is an electrostatic image developing toner including: toner mother particles containing a binder resin and a releasing agent; and an external additive, wherein the binder resin contains a crystalline resin, and the electrostatic image developing toner satisfies the following formulas (1) and (2),tan &#x3b4;&#x3c;tan &#x3b4;&#x2003;&#x2003;Formula (1):0.0005&#x2264;tan &#x3b4;&#x2212;tan &#x3b4;,&#x2003;&#x2003;Formula (2):wherein: tan &#x3b4;is a peak top value of a loss tangent when the loss tangent is measured from 25&#xb0; C. to 100&#xb0; C. at a frequency of 1 Hz and a heating rate of 6&#xb0; C./min; and tan &#x3b4;is a peak top value of a loss tangent when the loss tangent is measured from 25&#xb0; C. to 100&#xb0; C. at a frequency of 1 Hz and a heating rate of 3&#xb0; C./min.

Electrostatic image developing toner

Provided is an image forming method using an electrostatic image developing toner containing: toner mother particles including a binder resin; and an external additive, wherein the binder resin contains a vinyl resin in an amount of 40 mass % or more with respect to the total amount of the binder resin, the image forming method including a step of: forming an image so that an image surface resistance value at 70&#xb0; C. by a temperature change method of the formed image is set to be 5&#xd7;10&#x3a9; or less.

In an image forming method according to the present invention, an image is formed by removing residual charge from the image on an image recording medium. The image forming method includes formation of an image for forming a toner image by fixing a toner on the image recording medium and application of voltage from a voltage applier, the voltage having a polarity reverse to a polarity of a surface potential of the toner image. The toner includes toner base particles and an external additive. The toner base particles include a crystalline polyester resin.

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Hachioji, Japan

Ami Motohashi