Fuji Photo Film Company, Limited

Japan Synthetic Rubber Co., Ltd.

Shiseido Company, Limited

Yasuo Nishikawa

Tsutomu Okita

Hiroshi Hashimoto

Toshio Ishida

Takao Ohya

Takahito Miyoshi

Yoshito Mukaida

Akira Ushimaru

Kunihiko Sano

Masahiro Niinomi

Kenji Yanagihara

Mituo Kimura

Masatoshi Takahashi

Toshio Kawamata

Kyoichi Naruo

Nobuyuki Yamamoto

Sugihiko Tada

Masaaki Fujiyama

Hiroyuki Iwasaki

Akihiro Matsufuji

Katsumi Ryoke

Nobuo Tsuji

Masashi Aonuma

Takashi Yoneyama

Jun Nakagawa

Satoru Hayakawa

Mikihiko Kato

Akira Kasuga

Akio Yanai

Hideomi Watanabe

Hiroshi Fukui

Kiyomi Ejiri

Ryuji Shirahata

Makoto Nagao

Tadashi Yasunaga

Tatsuya Yamada

Masakazu Yoneyama

Akira Nahara

Eiichi Tadokoro

Yasushi Endo

Masao Yabe

Fusao Yamanaka

Kenichi Masuyama

Masami Sato

Hiroaki Araki

Kazuhiko Morita

Takanori Sato

Kazuko Hanai

Yonosuke Takahashi

Yutaka Kakuishi

Mikio Ohno

Kazuaki Taga

Hajime Miyatsuka

Takashi Iwasaki

Yuzo Higaki

Tadashi Ishikuro

Sei Kawahara

Hisamasa Abe

Yuji Shirakura

Tatsuo Shimizu

Teruo Yamashita

Yuji Andou

Hajime Miyazuka

A method of manufacturing a photographic printing paper support wherein a composition consisting essentially of polyethylene terephthalate is hot extruded so as to cover at least one surface of the raw paper, this method being characterized in that after a hot extruded film of the aforesaid composition is discharged onto the raw paper on the nip roll, it is pressed in contact with the chilled roll.

Method of manufacturing a photographic printing paper support

A metal thin layer type magnetic recording medium is disclosed, comprising a non-magnetic support having formed thereon (1) a ferromagnetic metal thin layer or (2) a ferromagnetic metal thin layer and a protective layer formed on the ferromagnetic metal thin layer, wherein a layer comprising a polymer of at least one chain or cyclic silicone compound which is formed on the surface of the ferromagnetic metal thin layer or the protective layer by bringing the silicone compound into contact with the surface in the vapor phase is provided on the surface; the atomic number ratio (Si.sub.2p /Co.sub.2p.sup.3/2) of Si in the polymer is from 0.02 to 0.30; and the silicone compound is represented by formula (I):

Metal thin film magnetic recording medium having a silicone compound

A support for a photographic printing paper comprising a substrate and a waterproof resin coating layers provided on the both sides of the substrate, wherein at least the waterproof resin-coating provided on the side of the substrate on which an emulsion for forming an image is coated comprises i) a lowermost waterproof resin coating layer contacting the substrate and ii) at least one upper coating layer containing a waterproof resin capable of melt-extruded at a temperature of from 170.degree. to 290.degree. C. and containing uniformly dispersed titanium dioxide, and a method for manufacturing the support by melt extrusion.

Support for a photographic printing paper and a manufacturing process

A magnetic recording medium having stable running properties and durability even under the severe environmental conditions of low or high humidity is disclosed. The magnetic recording medium comprises a non-magnetic support and a magnetic layer of a thin ferromagnetic metal film formed thereon, wherein the thin ferromagnetic metal film has thereon at least one member selected from fluorine-containing multi-chain type compounds represented by the following general formula (I):

Magnetic recording medium

Disclosed is a photographic printing paper comprising a raw paper which has on the emulsion side a resin coating constituted of polyethylene terephthalate or a resin blend of polyethylene terephthalate and another resin and titanium oxide grains dispersed therein and on the back side a resin coating constituted of the same polyethylene terephthalate or resin blend as used in the resin coating on the emulsion side and inorganic grains having an average grain size of from 1.5 to 12 .mu.m.

Photographic printing paper support

A magnetic recording medium high in storage stability and excellent in running properties and durability over a wide range of temperature and humidity, which comprises a non-magnetic support having a magnetic layer formed thereon, in which the magnetic recording layer contains a tertiary branched chain fatty acid ester represented by the following general formula ( I ): ##STR1## wherein each of R.sup.1, R.sup.2 and R.sup.3 independently represents a hydrocarbon group having 1 to 18 carbon atoms, and R.sup.4 represents a hydrogen group having 1 to 24 carbon atoms, provided the total number of carbon atoms in the ester is 12 to 40.

Magnetic recording medium comprising a magnetic layer having

A ferromagnetic thin metal film type magnetic recording medium is disclosed, comprising a non-magnetic support having thereon a ferromagnetic thin metal film, wherein a perfluoropolyether having at least one polar group having the saturation adsorption amount (mg/m.sup.2) of at least 4.0 mg/m.sup.2 against the ferromagnetic thin metal film is coated or applied onto the surface of the ferromagnetic thin metal film. There is also disclosed a method for preparing a ferromagnetic thin metal film type magnetic recording medium comprising forming a ferromagnetic thin metal film, subjecting the ferro-magnetic thin metal film to a treatment with oxygen gas, ozone gas, a heat treatment or a treatment with an inert gas, and then applying a perfluoropolyether having at least one polar group to the ferromagnetic thin metal film.

Method for preparing a magnetic recording medium

A magnetic recording medium is disclosed, comprising a non-magnetic support having provided thereon a magnetic layer comprising a ferromagnetic metal thin film, wherein a protective layer made mainly of a fluorine-based resin represented by formula (I): ##STR1## wherein m is an integer of 1 or more, and n is an integer of 10 or more, is provided on the ferromagnetic metal thin film.

Magnetic recording medium comprising a ferromagnetic thin film and a

A photographic printing paper support wherein one side of the raw paper is covered by a composition containing titanium oxide dispersed in polyethylene terephthalate resin or a mixture of polyethylene terephthalate and another resin, and the other side is covered by a composition containing calcium carbonate dispersed in polyethylene terephthalate resin or a mixture of polyethylene terephthalate with another resin, which can provide an excellent photographic paper having good water resistance, whightness and gloss is disclosed.

A magnetic recording medium is provided comprising a non-magnetic support having thereon at least one magnetic layer comprising a ferromagnetic powder, a binder, and at least one of organic silicone compounds represented by formulae (I-1) or (I-2); ##STR1## wherein R represents a branched saturated hydrocarbon group having from 7 to 24 carbon atoms; m represents an integer of from 1 to 100; n represents an integer of from 0 to 250; and m.gtoreq.n/5.

Magnetic recording medium having a magnetic layer comprising

A magnetic recording medium comprising a non-magnetic support having thereon a magnetic layer, wherein said magnetic layer contains (a) an oxo acid having a hydrocarbon group or a salt thereof, and (b) a fluorinated polyether.

Magnetic recording medium comprising a ferromagnetic metallic then film

A magnetic recording medium comprising a non-magnetic support having provided thereon a magnetic layer comprising a ferromagnetic powder and a binder material, wherein the magnetic layer contains at least a vinyl chloride copolymer binder having at least one polar group selected from --SO.sub.3 M and --COOM, wherein M represents a hydrogen atom, an alkali metal, or an ammonium ion, and at least one epoxy group per molecule in an amount of 1.times.10.sup.-4 to 1.times.10.sup.-2 per gram, and a fatty acid amide having from 12 to 26 atoms and present in an amount of from 0.05 to 2 wt % based on the amount of the ferromagnetic powder, and wherein the content of the polar group in the vinyl chloride copolymer binder is from about 1.times.10.sup.-7 to 1.times.10.sup.-3 equivalent per gram, and wherein the vinyl chloride copolymer binder has a weight average molecular weight of from 20,000 to 100,000 and wherein the magnetic layer further contains a polyurethane resin having a polar group.

Magnetic recording medium having ferromagnetic powder, a binder

A magnetic recording medium comprising a non-magnetic support having a magnetic layer provided thereon, wherein a higher fatty acid hydroxylaluminum salt represented by formula (I) is provided in or on the magnetic layer:

Magnetic recording medium having a specified fatty acid hydroxylaluminum

A magnetic recording medium comprising a non-magnetic support having thereon a magnetic layer comprising ferromagnetic metal powder and a binder, the magnetic layer further comprising carbon black having an average particle diameter of 250 m.mu. or more in an amount of from 1 to 10 parts by weight per 100 parts by weight of the ferromagnetic metal powder, and an ester of tridecyl alcohol with stearic acid and/or an ester of tridecyl alcohol with palmitic acid in an amount of from 5 to 20 parts by weight per 100 parts by weight of the ferromagnetic metal powder.

A magnetic recording medium comprising a nonmagnetic support having formed thereon a magnetic layer containing ferromagnetic particles dispersed in a binder, wherein the surface of the magnetic layer has pores of (a) at most 50 .ANG. in the average value of pore inlet diameters measured by a nitrogen gas adsorption method and (b) at least 25 .ANG. in the half value width of the frequency distribution curve of the pore inlet diameters.

Magnetic recording medium having a surface with pores of specified

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Kanagawa, Japan

Yasuo Nishikawa