Fuji Photo Film Company, Limited

Toshiaki Endo

Keiso Saeki

Fumiaki Shinozaki

Toshimasa Usami

Shintaro Washizu

Akihiro Shimomura

Jun Yamaguchi

Sumitaka Tatsuta

Shohei Yoshida

A multicolor recording material is disclosed, which comprises a support having provided thereon a coating layer comprising two or more kinds of microcapsules each containing at least a leuco dye capable of being colored by oxidation and a photo oxidizing agent outside said microcapsules, and a reducing agent as necessary components, with two or more leuco dyes capable of forming different colors from each other being retained in different kinds of said microcapusles respectively composed of walls of high polymers having different glass transition points.

Multicolor recording material

A light-image forming material comprising a support having provided thereon a light-image forming layer comprising microcapsules containing an oxidative-developable leuco dye and a photo-oxidizing agent, and a reducing agent as essential ingredients, wherein the material also includes a covering layer or intermediate layer containing a film-forming high-molecular binder and/or an inorganic or organic pigment.

Light-image forming material

An image-forming material comprising: (a) microcapsules, in which at least one leuco dye capable of developing a color by oxidation and at least one photooxidizing agent (preferably a combination of a lophine dimer and an organic halogeno-compound) are enclosed together, and (b) at least one reducing agent not enclosed in the microcapsules (preferably present in the form of an emulsified dispersion), thereby achieving image formation in a completely dried condition, and ensuring excellent freshness keeping property, image reproducibility and fixability.

Microcapsule containing photo-oxidizing agent and leuco dye

This invention discloses a heat sensitive recording material having a heat sensitive layer on a support; either of a color forming material or a developer which are contained in the heat sensitive layer is encased in a microcapsule. Since a plasticizer for a wall material of the microcapsule and a compound having an effect to depress the melting point of at least one member out of developers, a color forming reaction is carried out smoothly under a recording condition, therefore, a density of an obtained image is sufficient. Especially good results are obtained when a macromolecule substance selected from a group of polyurethane, polyurea, polyamide, polyester and polycarbonate is used as a wall material of the microcapsule. A coloring reaction assistant may be contained in any place of the heat sensitive layer. A preferable plasticizer can be selected from a group of phenols, alcohols, ureas, sulfonamides, carbamates and aromatic methoxy compounds.

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Shizuoka, Japan

Toshiaki Endo