Ricoh Company, Ltd.

Junko Yamaguchi

Tetsuji Kunitake

Keishi Taniguchi

Tadafumi Tatewaki

Masanaka Nagamoto

Shigeru Miyajima

Yasumitsu Kuga

Mitsuru Maeda

Kazuyoshi Inamura

Yoshiaki Yamada

Hiroshi Yamashita

Shigeyuki Harada

Kazuoki Fuwa

Yuka Mizoguchi

Toma Takebayashi

Shizuka Hashida

Shuhei Shiraishi

Hirokazu Watari

Maia Kamei

Keisuke Ohta

A toner is provided. The toner comprises a glittering pigment and a coloring pigment. The glittering pigment is disposed inside the toner. The coloring pigment comprises a yellow pigment comprising an isoindoline pigment.

Toner, developer, process cartridge, image forming apparatus, image forming method, and method for manufacturing toner

A thermal image transfer recording sodium includes a support and a thermal image transfer ink layer formed on the support. The thermal image transfer ink layer contains a coloring agent, a resin with a melting point of 120.degree. C. or more and an SP value of 10.5 to 12.5, and a melt viscosity lowering material for lowering the melt viscosity of the resin, with the compatibility of the resin and the malt viscosity lowering material, measured by a transparency measurement method, being 0.20 or less, or with the melt viscosity at 150.degree. C. of the thermal image transfer ink layer being in the range of 1.times.10.sup.2 to 5.times.10.sup.6 poise.

Thermal image transfer recording medium

A thermal image transfer recording medium includes a support and a thermal image transfer ink layer formed on the support. The thermal image transfer ink layer contains a coloring agent, a resin with a melting point of 120.degree. C. or more and an SP value of 10.5 to 12.5, and a melt viscosity lowering material for lowering the melt viscosity of the resin, with the compatibility of the resin and the melt viscosity lowering material, measured by a transparency measurement method, being 0.20 or less, or with the melt viscosity at 150.degree. C. of the thermal image transfer ink layer being in the range of 1.times.10.sup.2 to 5.times.10.sup.6 poise.

Thermal image transfer recording medium and recording method using the

A thermal image transfer sheet comprises a support and an ink layer formed thereon, which ink layer comprises as the main components a colorant and at least one binder resin selected from the group consisting of polyvinyl butyral resin, vinyl chloride resin, vinylidene chloride resin, vinylidene chloride-acrylonitrile copolymer resin, fluorine-containing resin, polyamide or a copolymer thereof, polyethylene resin, polypropylene resin, polyester resin, NBR, and ethylene - vinyl acetate copolymer resin, and a thermal image transfer recording medium comprises the thermal image transfer sheet and an image-receiving member is composed of a support and an image-receiving layer preferably comprising as the main component a polyamide and/or a copolymer of the polyamide, or an image-receiving layer made of nylon 6 or nylon 66.

Thermal image transfer sheet and thermal image transfer recording medium

A thermal image transfer recording medium comprising a substrate and a thermally transferable ink layer comprising as the main components a coloring agent and a saturated linear polyester resin.

A thermosensitive image transfer recording medium is disclosed, which comprises (i) a heat-resistant support and (ii) a thermofusible ink layer formed on the support, comprising as the main components (a) a binder agent comprising as the main component a low-molecular-weight mixed polyamide having an ether linkage therein, having the formulas,

Polyamides and thermosensitive image transfer recording medium using the

An image transfer type thermosensitive recording medium comprising a substrate and a double-layered thermal transfer ink layer formed thereon, which comprisees (i) a first layer formed on the substrate, comprising a thermofusible material and an oil component, which first layer melts to become a liquid having a low viscosity when heated to a predetermined temperature, the oil component comprising as the main components hydrocarbon of methane series and cycloparaffin, and having a viscosity of 100 cst or less at 40.degree. C. and a viscosity of 20 cst or less at 100.degree. C., and (ii) a second layer formed on the first layer, comprising a thermosoftening resin and a coloring agent, which second layer becomes soft, without being melted at the predetermined temperature or higher.

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Shizuoka, Japan

Junko Yamaguchi