Fuji Photo Film Company, Limited

Noriyuki Hosoi

Hiroharu Matsukawa

Yasuhiro Ogata

Akihiro Shimomura

Takeshi Mikami

Yuichi Itabashi

Yoshio Inagaki

Kotaro Nakamura

Akira Hatakeyama

Toshimasa Usami

Naoto Yanagihara

Masao Yabe

Kensuke Ikeda

Yasuzi Asao

Yoshiyuki Hoshi

Koh Takeuchi

A heat-sensitive recording material comprising a substantially transparent support and a heat-sensitive recording layer formed on one side thereof, wherein the thermal recording energy required for increasing the transmission density of recorded areas as measured with a Macbeth transmission densitometer TD904 (visual filter) to a value higher by 0.1 than the transmission density of non-recorded areas is from 10 mJ/mm.sup.2 to 40 mJ/mm.sup.2, and the energy required for obtaining a transmission density of 2.5 in recorded areas as measured with a Macbeth transmission densitometer TD904 (visual filter) is from 80 mJ/mm.sup.2 to 130 mJ/mm.sup.2. The recording material provides a highly precise gradated image using a conventional thermal head.

Heat-sensitive recording material

A heat-sensitive recording material comprising on a support a heat-sensitive layer comprising color-forming component A, color-forming component B which forms a color by reacting with the color-forming component A, and a tricarbocyanine dye having at least two acidic groups, wherein the tricarbocyanine dye has an absorption maximum wavelength of 650 to 1300 nm in the heat-sensitive layer and has an absorption maximum wavelength 50 nm or more longer than that of an aqueous solution of the tricarbocyanine dye.

Heat-sensitive recording materials for infrared-laser recording

A heat-sensitive recording material for laser recording is provided including a support having thereon a heat-sensitive layer including at least a first substantially colorless coloring component, a second substantially colorless coloring component which reacts with the first substantially colorless coloring component to develop a color, and an infrared-absorbing dye.

Heat-sensitive recording material for laser recording

A method for forming an image is described which includes bringing a transparent heat-sensitive recording material including a transparent support made of a synthetic polymer having thereon a transparent heat-sensitive recording layer into contact with a light-absorbing material, at least at the time of effecting recording, and irradiating the light-absorbing material with a laser beam to heat the transparent heat-sensitive recording layer and to cause color formation therein. High speed, high density, and high quality recording can be performed with an increased light absorption efficiency.

Image forming method

A multicolor recording material having on one side of a support at least two layers capable of producing colors different from each other in hue through respective color-producing reactions, which further has an interlayer constituted by a water-soluble polyanionic polymer having gelled through the interaction with a polycation between every adjacent two of said color-producing layers to prevent migration of ingredients from one color-producing layer to another.

Multicolor recording material

A toner employable for electrostatography which is in the form of micro-capsule comprises a core material enclosed with a resin shell. The core material contains a colorant and an oily medium wherein the oily medium contains chlorinated paraffin. A process for forming a visible image employing the toner is also disclosed.

Encapsulated electrostatographic toner and method for use thereof

An improved electrostatographic toner comprises toner particles which comprise a colorant and a binder, wherein to a surface of said toner particle are attached polymer chains formed by a graft polymerization reaction of a monomer having two or more polymerizable double bonds and a monomer having a charge-control group and a polymerizable double bond.

Toner for use in electrostatography

An electrostatographic toner material suitably employable for the pressure fixing process, which comprises encapsulated toner particles having an average particle size in the range from about 0.5 to 1,000 microns, in which the toner particle comprises a pressure fixable adhesive core material containing colorant and magnetizable substance and a pressure rupturable shell enclosing the core material, the outer surface of the shell being provided with white electroconductive powder.

Electrophotographic encapsulated pressure fixable toner particles with

An electrostatographic encapsulated toner for pressure fixing process comprising a core material which comprises a colorant and a binder composition, and a shell. The binder composition comprises a polymer and an oily liquid in which said polymer is dissolved or swelled in said oily liquid. The core material contains a silicone which is insoluble in the binder composition and the shell has metal oxide particles therein or on its outer surface.

Electrostatographic encapsulated toner

An electrostatographic encapsulated toner comprising a core material which comprises a colorant and a binder and a resin shell enclosing said core material in the form of micro-capsule, which is characterized in that:

A novel heat-sensitive recording material is provided comprising a support, a heat-sensitive coloring layer containing an electron donating dye precursor which is normally colorless or light-colored and an electron accepting compound which exhibits a color upon reaction with said dye precursor, a first protective layer containing a polyvinyl alcohol resin and a second protective layer containing a silicon-containing denaturated polyvinyl alcohol, a colloidal silica and/or amorphous silica, wherein either of the first or second protective layer may be coated directly on said coloring layer.

A heat-sensitive recording material is disclosed, comprising a heat-sensitive layer containing a normally colorless or slightly colored dye precursor and a compound capable of reacting with the dye precursor to form color, with at least one of the heat-sensitive layer, an interlayer, and a protective layer containing polyvinyl alcohol as an adhesive and a hardener represented by formula (I) ##STR1## wherein R.sub.1, R.sub.2, R.sub.3 and R.sub.4 each represents a hydrogen atom, a halogen atom, a saturated or unsaturated hydrocarbon group containing from 1 to 6 carbon atoms, or a saturated or unsaturated hydrocarbon group containing from 1 to 20 carbon atoms and at least one ether bond.

A process for the preparation of an encapsulated electrostatographic toner material comprising a stage of forming shells around micro-droplets of core material containing colorant dispersed in an aqueous medium to produce microcapsules therein, and a stage of separating the microcapsules from the aqueous medium,

Preparation of encapsulated electrostatographic toner material

A process for producing a heat-sensitive recording paper is disclosed. The process involves pretreating base paper by a high-frequency corona discharge. The base paper treated in this manner can be utilized in producing a heat-sensitive recording material by providing a heat-sensitive layer thereon. By subjecting the base paper to the high-frequency corona discharge treatment the base paper can be uniformly coated with a heat-sensitive recording material without leaving any blank spaces thereon.

Process for producing heat-sensitive recording paper

A process for the preparation of an electrostatographic toner material suitably employable for the pressure fixing process which is provided with a colored electroconductive powder on the outer surface, which comprises encapsulating pressure fixable adhesive core material containing colorant and magnetizable substance with shell material in an aqueous medium to prepare encapsulated toner particles and spray-drying the so prepared encapsulated toner particles together with the colored electroconductive powder.

Growing community of inventors

Shizuoka, Japan

Noriyuki Hosoi