Fuji Photo Film Company, Limited

Hirokazu Shimada

Kotaro Nakamura

Toshiharu Tanaka

Akihiro Shimomura

Sadao Ishige

Takekatsu Sugiyama

Fumiya Tabata

A thermosensitive recording material having at least a thermosensitive recording layer on one surface of a support and a back coat layer on the other surface of the support, wherein the black coat layer includes multiple layers, and an outermost layer of the back coat layer furthest from the support contains polyvinyl alcohol, an inorganic stratiform compound, and an inorganic pigment. According to the thermosensitive recording material curling caused by a change in environment or by application of heat during recording can be prevented and a coefficient of friction of a back coat layer can be regulated to within a predetermined range.

Thermosensitive recording material

Heat-sensitive recording material

A heat development type duplicating material having a recording layer which is formed on a support. The recording layer comprises a photosensitive diazo compound and a coupler that reacts with the diazo compound to develop color. Furthermore, the duplicating material contains an ascorbic acid derivative. The heat development type duplicating material generates little stain in background areas, exhibits satisfactory storage stability, and provides a high image density.

Heat development duplicating material comprising ascorbic acid

A diazo-type recording material comprising a support having thereon a recording layer comprising a photosensitive diazo compound enclosed in microcapsules, a coupling component which reacts with said diazo compound by heating at a basic pH to develop a color, and a 1-phenyl-3-pyrazolidone compound represented by the formula: ##STR1## wherein the substituents X, and R.sub.1 -R.sub.4 are defined in the specification.

Diazo-type recording material comprising a

A novel diazo type recording material is provided comprising a recording layer containing at least one light-sensitive diazo compound incorporated in microcapsules and a coupling component which undergoes reaction with said diazo compound in a basic atmosphere to develop a color on a support, wherein said coupling component is a mixture of at least one compound represented by the following general formula [I] and at least one compound represented by the following general formula [II]: ##STR1## wherein A represents an alkylene group having from 1 to 22 carbon atoms containing an ether or thioether bond; B represents hydrogen atom, cyclohexyl group, morpholino group or piperidino group; and R.sub.1, R.sub.2, R.sub.3 and R.sub.4 each represent hydrogen atom, an alkyl group having from 1 to 5 carbon atoms, alkoxy group having from 1 to 5 carbon atoms or halogen atom.

Diazo type recording material comprising two couplers wherein the novel

A heat-developable copying material comprising a support having thereon a heat-developable light-sensitive layer comprising microcapsules containing a diazo compound and substantially no solvent, a coupling component and a color basic substance.

Heat-developable light-sensitive copying material comprising

The present invention is directed toward a heat development copying material, comprising a support having provided thereon a photosensitive layer containing a diazo compound, a coupling component, a color-forming assistant, and a film-forming high polymeric binder; and a light-insensitive intermediate laeyr containing a film-forming high polymeric binder, and at least one member selected from the group consisting of a coupling component and a color-forming assistant, wherein the light-insensitive intermediate layer is provided between the support and the photosensitive layer, and a method for forming an image using the above-described copying material.

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Shizuoka, Japan

Hirokazu Shimada