Fuji Photo Film Company, Limited

Fujifilm Corporation

Hisao Yamada

Naoto Yanagihara

Mitsuyuki Tsurumi

Kazuyuki Koike

Kazumori Minami

Kazunori Nigorikawa

Hiroshi Sato

Ken Iwakura

Masanobu Takashima

Atsuhiro Ohkawa

Yuichi Wakata

Ryoichi Nakano

Tetsunori Matsushita

Kimiatsu Nomura

Yohsuke Takeuchi

Kozo Nagata

Shunsaku Higashi

Kousaku Yoshimura

Tatsuo Kawabuchi

Yoshihiro Jinbo

An ink-jet recording sheet including a color material receiving layer on a substrate. The color material receiving layer contains a compound represented by the following general formula (I), In the general formula (I), Rand Reach independently represent a hydrogen atom, an aliphatic group, an aromatic group, a heterocyclic group, &#x2014;COR, &#x2014;COOR, &#x2014;SO&#x2014;R, or &#x2014;N(R)R. Rand Reach independently represent a hydrogen atom, an aliphatic group, an aromatic group, a heterocyclic group, or &#x2014;N(R)R. Rrepresents a hydrogen atom, an aliphatic group, an aromatic group, or a heterocyclic group. Rto Reach independently represent a hydrogen atom, an aliphatic group, an aromatic group, an acyl group, an alkoxy carbony group, an aryloxy carbonyl group, a carbamoyl group, an alkyl sulfonyl group, an aryl sulfonyl group, or a sulfamoyl group. Rand Rmay link with each other so as to form a ring. Rto Reach independently represent a hydrogen atom, an aliphatic group, an aromatic group, a heterocyclic group, &#x2014;COR, &#x2014;COOR, or &#x2014;N(R)R. Rrepresents a hydrogen atom, an aliphatic group, an aromatic group, a heterocyclic group or &#x2014;N(R)R. Rrepresents a hydrogen atom, an aliphatic group, an aromatic group, or a heterocyclic group. Rand Reach independently represent a hydrogen atom, an aliphatic group, an aromatic group, an acyl group, an alkoxy carbonyl group, an aryloxy carbonyl group, a carbamoyl group, an alkyl sulfonyl group, an aryl sulfonyl group, or a sulfamoyl group.

Ink-jet recording sheet

An inkjet recording sheet has a colorant-receiving layer on a support. The colorant-receiving layer is provided with at least one of compounds represented by the following formulas (1) to (4) and which has either or both of an I/O value of at least 0.5 and a water soluble property. The colorant-receiving layer is also provided with at least one organic mordant selected from polyallylamine, polyvinylamine and derivatives of these. In the formulas, each of Rto Rindependently represents an alkyl group, an aryl group, or a heterocyclic group that may have a substituent, and any of pairs Rand R, Rand R, and Rand Rmay be mutually coupled to form a ringR&#x2014;S&#x2014;R&#x2003;&#x2003;General Formula (1)R&#x2014;S&#x2014;S&#x2014;R&#x2003;&#x2003;General Formula (2)R&#x2014;SH &#x2003;&#x2003;General Formula (3) 

Inkjet recording sheet

The present invention provides a thermal recording material comprising a support and at least a thermal recording layer disposed on the support, wherein at least one of the thermal recording layer includes, together with an electron donating colorless dye, at least an electron accepting compound represented by the following general formula (1). Rand Reach independently represents a hydrogen atom, an alkyl group or an aryl group; and Ar is represented by the following general formula (2). In the general formula (2), Rto Reach independently represents a hydrogen atom, an alkyl group with 1 to 4 carbon atoms or an aryl group.

Thermal recording material

A heat-sensitive recording material includes a support having disposed thereon a heat-sensitive layer including microcapsules, which contain an achromic or hypochromic electron-donating dye precursor, and a developer, wherein the microcapsules contain at least one metal compound.

Heat-sensitive recording material

The present invention provides a method for forming an azo colorant by reaction of a diazo compound and a coupler. The coupler has a leaving group at the coupling position thereof, such that a coupling reaction rate is faster than it would be if the coupler did not have the leaving group. The coupling reaction rate constant k is preferably 0.1 (s) or more.

Method for forming azo colorant using diazo compound and coupler having leaving group and recording material using the coupler

Guanidine compound and heat sensitive recording material

Pyrrolopyrimidineone compound and heat-sensitive recording material using the same

A hydrazone dye is provided which forms cyan color having an excellent hue. The hydrazone dye is expressed by the following general formula (I):

Hydrazone dye

There is provided a coupler giving a magenta pigment excellent in hue using a diazonium salt compound which can be fixed at a wavelength around 420 nm. A heat-sensitive recording material comprising a substrate carrying thereon a heat-sensitive recording layer containing a diazonium salt compound and a coupler which develops color by reacting with said diazonium salt compound in heating, wherein said coupler comprises at least one compound represented by the following general formula (1):

A heat-sensitive recording material having a support and a heat-sensitive recording layer provided thereon. The heat-sensitive recording layer contains a diazonium salt compound and a coupler which reacts with the diazonium salt compound upon heating to form a color. The heat-sensitive recording layer contains a compound of the following formula (I): ##STR1## wherein R represents a member selected from the group consisting of a hydrogen atom, a halogen atom, an alkyl group, and an aryl group; X represents a member selected from the group consisting of --COOR.sup.1, --OCOR.sup.--1, --CONR.sup.1 R.sup.2, and --NR.sup.2 COR.sup.1 ; R.sup.1 represents an alkyl group or an aryl group, R.sup.2 represents a member selected from the group consisting of a hydrogen atom, an alkyl group, and an aryl group; n represents an integer from 1 to 5.

.alpha.-resorcylic acid ester derivatives useful as electron-accepting compounds for recording materials, and highly durable recording materials containing these derivatives. The .alpha.-resorcylic acid derivative is represented by the following general formula (I), ##STR1## wherein R.sub.1 represents a hydrogen atom, a halogen atom or an alkyl group, and X represents a divalent group.

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Shizuoka-ken, Japan

Hisao Yamada