Seiko Epson Corporation

Kenichi Numakura

Hiroshi Takahashi

Jun Ito

Akihito Sao

Yoshihiro Ueno

Kenichiro Kubota

Makoto Nagase

Yasunari Ikeda

Tsutomu Teraoka

Shinichi Naito

Keiji Iida

Masahiro Oki

The ink composition for ink jet recording according to the invention includes a coloring material, a cyclic ester, a first organic solvent having a flash point of 70&#xb0; C. or less and represented by Formula (I):R&#x2014;O&#x2014;(R&#x2014;O)&#x2014;R&#x2003;&#x2003;(I)(wherein, Rrepresents an alkyl group having 1 to 4 carbon atoms; Rrepresents an ethylene group or a propylene group; and Rrepresents a hydrogen atom or an alkyl group having 1 to 4 carbon atoms), and a second organic solvent having a flash point of 90&#xb0; C. or more. The cyclic ester has a content 'a' (% by mass) of 6% by mass or more and 30% by mass or less. The content 'a' (% by mass) of the cyclic ester, the content &#x201c;b&#x201d; (% by mass) of the first organic solvent, and the content &#x201c;c&#x201d; (% by mass) of the second organic solvent satisfy a relationship represented by Expressions (1) and (2):&#x2003;&#x2003;(1)&#x3c;()/2&#x2003;&#x2003;(2).

Ink composition for ink jet recording

A liquid developer is provided. The liquid developer includes a liquid insulator and toner particles. The liquid insulator toner particles include a resin material, a colorant, a substance A, a substance B, and a substance C. The substance A is an acrylic-modified silicone. The substance B is at least one selected from the group consisting a quaternary cationic silicone, an aminophenyl-modified silicone, and a phenyl-modified silicone. The substance C is at least one of a silanol-containing polysiloxane and a fluorine-modified silicone. The average degree of roundness Rof the toner particles is 0.890 or greater, if the degree of roundness is expressed as L/L, where L(&#x3bc;m) is a circumference of a profile view of a measured particle and L(&#x3bc;m) is the circumference of a perfect circle of a circumference of a profile view corresponding to the profile view of the measured particle.

Liquid developer and method for producing liquid developer

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Azumino, Japan

Kenichi Numakura