Fuji Photo Film Company, Limited

Fujifilm Corporation

Itsuo Fujiwara

Ichizo Toya

Yoshiharu Yabuki

Toru Harada

Masaki Noro

Tadashi Ito

Hisashi Okamura

Isamu Itoh

Hirohiko Tsuzuki

Naoki Arai

Masami Sakurada

Yasuhiro Yoshioka

Takeshi Nakamura

Minoru Sakai

Yoshihisa Tsukada

Takao Masuda

Hiroshi Kitaguchi

Tadayoshi Kokubo

Yoshimasa Aotani

Takashi Toyoda

Hajime Nakagawa

Yukio Shinagawa

Yasushi Nozawa

Masafumi Fukugawa

Shinzi Kataoka

The present invention provides a photothermographic material having, on one side of a support, an image forming layer including at least a photosensitive silver halide, a non-photosensitive organic silver salt, a reducing agent, and a binder, and at least one non-photosensitive layer which is disposed on the same side of the support as the image forming layer and farther from the support than the image forming layer, wherein the non-photosensitive layer includes at least a copolymer latex of an acrylate or methacrylate having a fluorine atom and a monomer component having a hydrophobic group, and the surface of the side having the image forming layer includes convex portions having a height of 1.5 &#x3bc;m or higher in an amount of from 20 to 2000 per 1 mm. A photothermographic material which exhibits excellent film physical properties and high image quality is provided.

Photothermographic material

A method of producing an organic silver salt dispersion, the method comprising: mixing a first aqueous solution including a water-soluble silver ion supplier and a second aqueous solution including an alkali metal salt of an organic acid to form an organic silver salt dispersion; wherein, the mixing is conducted in the presence of at least one compound selected from polyacrylamide and derivatives of polyacrylamide, and at least 10 mass % (in terms of silver quantity) of the organic silver salt in the organic silver salt dispersion is formed by simultaneous addition of the first aqueous solution and the second aqueous solution to an aqueous medium followed by mixing.

Method of producing organic silver salt dispersion, and photothermographic material

A photothermographic material is described, which comprises a support having provided on at least one side thereof a photosensitive silver halide, a photo-insensitive organic silver salt, a reducing agent for silver ion and a binder, wherein at least one layer constituting the photothermographic material comprises an oxazoline compound, by which sufficiently high image density is developed within practically feasible reaction time and temperature, and sufficiently suppressed background coloration is exhibited when stored for a prolonged period after development processing.

Heat development image forming process, thermally decoloring image recording process and process for decoloring cyanine dye

A photothermographic material which contains on one side of a support (a) a catalytically active amount of a photocatalyst, (b) a reducing agent, (c) a reducible silver salt, and (d) a binder, wherein a matting agent having a softening temperature of from 100 to 500&deg; C. is contained at least on one side of the support.

Photothermographic photosensitive material and photothemographic method

A heat developable light-sensitive material comprises a support, a light-sensitive layer and a non-light-sensitive layer. The light-sensitive layer contains silver halide and a reducing agent. The non-light-sensitive layer contains a cyanine dye represented by the formula (I) or a salt thereof and a base precursor:

Heat development image forming process thermally decoloring image recording process and process for decoloring cyanine dye

A photothermographic element has on a support a photo-sensitive layer, and a first non-photosensitive layer containing (1) a base-bleachable dye or a salt thereof and (2) a binder. The first non-photosensitive layer or a second non-photosensitive layer disposed adjacent thereto contains (3) a base precursor and (4) a melting point depressant. The dye (1) becomes more bleachable and the processed image becomes more water resistant.

Photothermographic element

A photothermographic recording element having improved image tone and improved tone stability during storage is provided wherein at least one of constituent layers comprises (a) polymeric microparticulates containing a dyestuff, (b) microcapsules containing a dyestuff, and/or (c) an organic or inorganic pigment.

Photothermographic recording elements

A photothermographic element has on a support a photosensitive layer and a non-photosensitive layer containing (1) a base precursor, (2) a base-bleachable dye or a salt thereof, and (3) a binder. A constituent layer on the same side of the support as the non-photosensitive layer contains (4) a water-soluble polymer other than gelatin. The element is improved in coating surface quality and minimized in residual color.

Photothemographic element

A latent image of a medical image is recorded on a heat development photosensitive material. Development is carried out on the photosensitive material, on which the latent image has been recorded, and the medical image having multiple gradation levels is thereby obtained. The development is carried out at a heating temperature falling within the range of 120.+-.10.degree. C., at a width-direction temperature accuracy falling within the range of .+-.3.degree. C., and for a development time falling within the range of 5 seconds to 30 seconds. In the heat development technique, the processing time is thus set to be a practically acceptable short time, noise is reduced, and a medical image having good image quality is obtained.

Image recording method and apparatus capable of efficiently developing

The present invention provides a photothermographic material which can provide an image having a high sharpness, exhibits a good transparency, is less liable to fog and is unsusceptible to discoloration during storage. The present invention also provides a photothermographic material which can provide a less fogged image having a high sharpness without using any mercury compound. A photothermographic material is provided comprising an anti-irradiation pigment incorporated in a photosensitive layer and an anti-irradiation dye incorporated in at least one light-insensitive layer on the same side of a support as the photosensitive layer.

An imaging material is provided in the form of a photothermographic or thermographic image forming layer containing an organic silver salt on one surface of a support and further comprising a polyvalent metal ion and a phthalic acid compound on the image forming layer-bearing surface of the support. The imaging material has improved shelf stability before and after image formation and the ease of handling and produces high-quality blue black tone images.

Imaging materials

A heat development image forming process comprises steps of: imagewise exposing to light a heat developable light-sensitive material comprising a support, a light-sensitive layer and a non-light-sensitive layer, and then heating the light-sensitive material. The light-sensitive layer or the non-light-sensitive layer contains a heptamethine cyanine dye represented by the formula (I): in which Z.sup.1 is --CR.sup.11 R.sup.12 --, --O--, --S-- or --NR.sup.13 --; Z.sup.2 is --CR.sup.21 R.sup.22 --, --O--, --S-- or --NR.sup.23 --; each of R.sup.1 and R.sup.2 independently is an alkyl group, a substituted alkyl group, an alkenyl group, a substituted alkenyl group, an aralkyl group or a substituted aralkyl group; R.sup.3 is hydrogen, a halogen atom, an alkyl group, a substituted alkyl group, a cycloalkyl group, a substituted cycloalkyl group, an aryl group, a substituted aryl group, a heterocyclic group, a substituted heterocyclic group, cyano, --SO.sub.2 R.sup.31, --OR.sup.32, --SR.sup.33 or --NR.sup.34 R.sup.35 ; X is an anion; and n is 0 or 1.

Heat development image forming process and heptamethine cyanine compound

Novel Schiff base quinone complexes are provided. They are useful as anti-fading agents and filter dyes. The anti-fading agents are applicable to heat developable photosensitive materials, silver halide photosensitive materials, and optical recording materials.

Schiff base quinone complexes and optical recording materials comprising

A novel silver halide photographic material is provided, comprising a hydrophilic colloidal layer containing at least one dye represented by the following formula (i): ##STR1## wherein Y.sup.1 and Y.sup.2 each represents a chalcogen atom, --CH.dbd.CH--, --N(R.sup.10)--, or --C(R.sup.10)(R.sup.11)--, in which R.sup.10 and R.sup.11 each represents an alkyl group; Z.sup.1 and Z.sup.2 each represents a nonmetallic atom group necessary for forming a benzo condensed or naphtho condensed ring; R.sup.1 and R.sup.2 each represents an alkyl group; the plurality of L groups may be the same or different and each represents a methine group, with the proviso that at least one of the plurality of L groups represents a methine group substituted by --OR.sup.12, --N(R.sup.12)(R.sup.13), --SR.sup.12 or --CH(R.sup.14)(R.sup.15), in which R.sup.12 represents an alkyl or aryl group substituted by an acidic substituent, R.sup.13 represents a hydrogen atom or an alkyl or aryl group substituted by an acidic substituent, and R.sup.14 and R.sup.15 each represents a cyano group, a carboxylic acid group, an acyl group, an alkoxycarbonyl group, an aryloxycarbonyl group, a carbamoyl group, a sulfonyl group or a sulfamoyl group, with the proviso that at least one of R.sup.14 and R.sup.15 contains an acidic substituent; X represents an anion; p represents an integer 0 or 1; r represents an integer 0 or 1; m represents an integer 2 or 3; and n represents an integer 1 or 2, with the proviso that when the dye forms an intramolecular salt, n is 1; and wherein the dye contains at least three acidic substituents.

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Kanagawa, Japan

Itsuo Fujiwara