Fuji Photo Film Company, Limited

Other

Takao Hayashi

Hajime Kato

Hiroharu Matsukawa

Akio Miyamoto

Mutsuo Akao

Makoto Yoshida

Kotaro Nakamura

Yasuhiro Ogata

Sadao Ishige

Teruo Kobayashi

Shiro Kimura

A package for diazo thermosensitive recording materials coiled round a core, which comprises a packaging paper being a water vapor permeability of more than 50 g/m.sup.2.24 hours and comprising a light-reflecting paper layer located as outer layer and a light-shielding paper layer located as inner layer. In the package of the invention, the packaging paper shields the recording material from the external heat and light. When internal humidity is increased such as by heating of the package such as higher than 50.degree. C., moisture passes through the packaging paper to the outside. Accordingly, fogging by precoupling of the packaged diazo thermosensitive recording materials, irrespective of the fixation type or not, is remarkably decreased, and the quality of the recording material can be maintained for a long period during storage.

Package for thermosensitive recording materials

A color developer containing a combination of zinc oxide, at least one salicylic acid or nuclear substituted salicylic acid, and at least one metal silicate as an inorganic pigment, and a recording unit having a layer of the color developer. The color developer has a high developing ability and is capable of forming a distinct color having a high light resistance when it is contacted with a color former.

Color developer, recording unit having a layer of the color developer

A process for the production of a color developer comprising reacting an alkali metal salt of an aromatic carboxylic acid and a water-soluble metal salt in the presence of clay and a water-insoluble aluminum compound.

Process for production of color developer

A process for producing a developer sheet for a pressure-sensitive recording paper which comprises dissolving an oil-soluble developer in an organic solvent, emulsifying the solution in water to provide an oil-in-water emulsion, and then coating on or incorporating into a support the resulting emulsion is disclosed.

Process for producing developer sheet for pressure-sensitive recording

A recording sheet comprising a support having thereon a color developer layer containing (1) a metal compound of an aromatic carboxylic acid and (2) at least one of gelatin or a gelatin derivative, the metal compound of an aromatic carboxylic acid being capable of forming a colored image when reacted with a color former.

Recording sheet

A method for fanning multi-ply sheets into units thereof, which comprises applying the adhesive composition to one side of a stack of multi-ply sheets, e.g., pressure-sensitive copying sheet units, and separating each unit of the sheets.

Method for fanning each set of multi-ply sheets

A recording sheet comprising a support having a developer layer thereon, the developer layer containing a phenol resin and an aqueous emulsion of an oily material and produced by admixing a coating composition containing a phenol resin and an aqueous emulsion of an oily material and coating the resulting mixture on a support.

Recording sheet and method for the production thereof

A process for separating a number of sheets into groups of sheets comprising coating an adhesive composition on an edge of a stack of the sheets and fanning the sheets. The adhesive composition contains a naphthalene sulfonic acid formaldehyde condensation product, a water-soluble polymer material, and a water-soluble metal salt.

Process for separating a number of sheets into groups

A color-forming composition and recording sheets embodying the composition are disclosed, wherein the color-forming composition comprises: (a) a leuco dye, (b) an aromatic secondary amine or derivative thereof and (c) an organic solvent.

Coated pressure sensitive copying paper

This invention provides a novel recording sheet having improved developing ability and resistance to light irradiation and which can be produced easily and economically. A developer layer coated on a support of the recording sheet contains a reacted compound between an alkali metal salt of a phenol resin and a water soluble metallic compound.

A color developer is disclosed which, when contacted with a color former, is capable of forming a distinct color, the color developer comprising a metallic compound of an aromatic carboxylic acid. Suitable metals are, for example, those of the following groups of the Periodic Table: Ib, IIa, IIIb, IVb, VIa, VIIa and VIII. A recording sheet employing the color developer is also disclosed.

Growing community of inventors

Fujimiya, undefined

Takao Hayashi