Mita Industrial Co., Ltd.

Yasutoki Kamezawa

Tatsuo Aizawa

Mamoru Kato

Yasuo Ueda

Kouzi Nihyakumen

Susumu Yamaura

Toshihiro Kouchi

Taizo Yokoyama

Hideo Fukuda

Hiroichi Morikawa

Toshimitu Ikeda

Kenzi Takahashi

Yasui Ueda

A transfer sheet for electrostatically transferring thereon an electrically conductive or electrically semi-conductive toner in electrostatic photography or electrostatic printing, which comprises a substrate and a toner-receiving layer formed on at least one surface of the substrate, which toner-receiving layer contains a composition comprising (A) a thermoplastic acrylic polymer having a carboxyl group content of 2 to 30% by weight and (B) a thermosetting resin reactive with the acrylic polymer (A), is produced by coating on at least one surface of the substrate an aqueous composition containing the thermoplastic acrylic polymer in the form of an aqueous emulsion and the thermosetting resin in the form of an aqueous solution and drying the coated substrate to form a toner-receiving layer on the surface of the substrate. In this transfer sheet, the electric resistance can be maintained at a high level even under high humidity conditions, and a toner image can be transferred on this transfer sheet at a high transfer efficiency.

Process for preparation of a transfer sheet for electrostatic

A transfer sheet for electrostatically transferring thereon an electrically conductive or electrically semi-conductive toner in electrostatic photography or electrostatic printing, which comprises a substrate and a toner-receiving layer formed on at least one surface of the substrate, which toner-receiving layer contains a composition comprising (A) 100 parts by weight of thermoplastic acrylic-styrene copolymer and (B) 10 to 100 parts by weight of dry method finely divided silica is disclosed. In this transfer sheet, the electric resistance can be maintained at a high level even under high humidity conditions, and a toner image can be transferred on this transfer sheet at a high transfer efficiency without broadening of contours of the image. This transfer sheet has feel and touch quite similar to those of ordinary paper and is very excellent in graphic characteristics.

Transfer sheet and process for preparation thereof

A photosensitive paper for electrophotography comprising a paper substrate, an electrophotographic photosensitive layer formed on one surface of the substrate and an electrically conductive coating layer formed on the other surface of the substrate, which electrically conductive coating layer comprises an electrically conductive binder medium and a fine powder of a fluorine resin distributed predominantly in the surface portion of the electrically conductive coating layer, is disclosed. This photosensitive paper is satisfactory in all of the following properties; adaptability to the paper feeding operation, the scratch resistance of the photosensitive layer, the blocking resistance and electric characteristics irrespective of the humidity conditions in the operation atmosphere.

Photosensitive paper for electrophotography with an electrically

A transfer sheet for electrostatically transferring thereon an electrically conductive or electrically semi-conductive toner in electrostatic photography or electrostatic printing, which comprises a substrate and a toner-receiving layer formed on at least one surface of the substrate, which toner-receiving layer contains a composition comprising (A) a thermoplastic acrylic polymer having a carboxyl group content of 2 to 30% by weight and (B) a thermosetting resin reactive with the acrylic polymer (A), and a process for preparing this transfer sheet by using an aqueous coating composition are disclosed. In this transfer sheet, the electric resistance can be maintained at a high level even under high humidity conditions, and a toner image can be transferred on this transfer sheet at a high transfer efficiency.

Transfer sheet with toner-receiving layer of thermoplastic and

A liquid developer comprising a dispersion of a dye or pigment having a long chain alkyl group in their molecular structure in a liquid hydrocarbon. The liquid developer for electrophotography is excellent in dispersibility of the image-forming dye or pigment particles, uniformity in charge polarity, storage stability, distinct-image forming ability and image-fixing property, and such liquid developer can be prepared without aid of conventional modifiers such as control agents dispersing agents, and fixing agents.

Liquid developer

An improved process for the diazo-type multicolor reproduction which can give multicolored copies excellent in the hue separation and can increase the number of copies obtained from an original treated with a color-forming agent is disclosed. This improved multicolor reproduction process is characterized by the use of a color-forming composition comprising a thermo-volatile or sublimable coupler and at least one hue separation-improving agent selected from polyalkylene oxides and polyalkylene oxide derivatives which are solid under normal conditions and fatty acid derivatives having a melting point of at least 100.degree.C.

Diazo-type multicolor reproduction process

An original-treating agent to be used in the process for the diazo-type multi-color reproduction by which portions of a sensitive paper corresponding to preselected portions of an original can be colored selectively in different hues.

Treating agent for diazo-type multicolor reproduction

This invention relates to a process for diazotype multicolor reproduction using an improved photosensitive material having a continuous thermoplastic resin pre-coated layer.

Diazotype multicolor reproduction process

An improved process for diazo-type multicolor reproduction comprising

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Osaka, Japan

Yasutoki Kamezawa