Fuji Photo Film Company, Limited

Fujifilm Corporation

Kazuhiko Fujiwara

Naoyuki Kawanishi

Kenji Nakajima

Seiji Ishizuka

Tadashi Sugiyama

Munehiro Ura

Tomokazu Yasuda

Fuminori Arai

Akira Kojima

Yasunori Ichikawa

Hiroshi Ohnishi

Atsushi Hayakawa

Shigeru Yamaguchi

Masataka Ogawa

Yutaka Tamura

Takahiro Moto

Hitoshi Namikawa

Hirokazu Yuhki

An optical compensatory sheet producing apparatus produces an optical compensatory sheet having a liquid crystal layer. In the apparatus, a rubbing unit is supplied with resin film having a first layer including resin, and subjects the first layer to a rubbing process, so as to form an orientation layer. A dust remover removes dust from the orientation layer by use of liquid such as perfluorocarbon, to which the orientation layer is insoluble. A liquid crystal layer coater is disposed downstream from the dust remover, for coating the orientation layer with coating liquid including liquid crystalline compound, so that the liquid crystal layer is formed.

Optical compensatory sheet producing method and apparatus, thermal treating method and apparatus, and dust removing method and apparatus

A process for alkali saponification of polymer film is disclosed. The process comprises the steps of applying solution of an alkali onto a polymer film having a temperature of not lower than room temperature, and washing away the alkaline solution from the film.

Process for alkali saponification of cellulose ester film surface

A part of a drive roller, whose peripheral surface is coated with an elastic body, is immersed in a cleaning liquid, and the rotation of the drive roller causes the surface of the elastic body to be wet with the cleaning liquid. The elastic body wet with the cleaning liquid continuously rubs a surface of a film being fed. Then, a wash nozzle sprays a cleaning liquid to the surface that has been rubbed by the elastic body. A shearing stress of the elastic body rubs off foreign matter adhering to the film. The foreign matter that has not been rubbed off by the elastic body is washed off by the cleaning liquid sprayed from the wash nozzle.

Web particle removal method and apparatus

An emulsification and dispersion method of a hydrophobic, photographically useful compound comprising dispersing a water-insoluble phase containing the hydrophobic, photographically useful compound in water or in a hydrophilic colloid composition, wherein the water-insoluble phase at a temperature at which the prepared dispersion is stored may have a viscosity of from 100 poise or more to less than 1,000,000 poise at the shear rate of 10 sec.sup.-1. According to the present invention, a silver halide photographic material comprising a fine dispersion of a hydrophobic, photographically useful compound and having an excellent production suitability can be obtained.

Emulsification and dispersion method of hydrophobic, photographically

A method for dispersing a water-insoluble phase containing a hydrophobic, photographically useful compound in water or a hydrophilic colloid composition using an anionic surface active agent is disclosed, which comprises dispersing the hydrophobic, photographically useful compound by using an anionic surface active agent having a hydrophobic group and a group represented by --SO.sub.3 M or --OSO.sub.3 M (where M represents a cation) and a specific phosphorus-containing surface active compound, or, adding the anionic surface active agent for dispersion, and after the completion of dispersion further adding the specific phosphorus-containing surface active compound. According to the dispersion method of the present invention, a dispersion favored with maintenance of fine particle performance at the dispersion and free of grain growth during aged storage or generation of coarse grains or precipitated crystals can be obtained.

Dispersion method of hydrophobic, photographically useful compound

A dry analytical element for use in detecting a specific component contained in a liquid, which element comprises one or more water permeable layers provided on a water impermeable support, at least one layer of the water-permeable layers containing a composition capable of interacting with said specific component contained in said liquid. The composition contains a leuco dye and a dispersion containing said leuco dye is incorporated in the water-permeable layer, which is formed by dissolving the leuco dye in a hydrophobic solvent containing an aliphatic higher alcohol and dispersing the resulting solution in a hydrophilic medium. The leuco dye has the formula: ##STR1## where R.sup.1 represents an unsubstituted or substituted aryl group, R.sup.2 represents an unsubstituted or substituted alkyl group, and R.sup.3 represents an unsubstituted or substituted aryl group. A process for producing said dry analytical element is also disclosed.

Dry analytical element and process for producing the same

A process for preparing an oil-in-water emulsion is described, comprising the steps of: adding a mixture of a hydrophobic substance and an emulsifying agent directly or after being dissolved in an organic solvent by heating in a dissolving-emulsifying tank with a high-speed agitation type dispersing means to form a hydrophobic substance solution as an oil phase, introducing water and/or an aqueous solution of gelatin into the tank through submerged inlet under the hydrophobic substance solution to form a water-in-oil emulsion, and further continuing the addition of water and/or an aqueous solution of gelatin to cause the phase inversion, whereupon the desired oil-in-water emulsion is formed. The mean particle size of the emulsion is decreased more than by the conventional emulsification method, and the particle size distribution is narrowed and made sharp.

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Kanagawa, Japan

Kazuhiko Fujiwara