Fuji Photo Film Company, Limited

Ryuichi Takahashi

Yoshiharu Yabuki

Taku Nakamura

A light-sensitive material comprising a support and a light-sensitive layer provided thereon is disclosed. The light-sensitive layer contains silver halide, a reducing agent, an ethylenically unsaturated polymerizable compound and a base precursor composed of a salt of a carboxylic acid with an organic base. The silver halide, reducing agent, polymerizable compound and base precursor are contained in microcapsules which are dispersed in the light-sensitive layer. The microcapsules are obtained by (1) dispersing the base precursor in water, (2) emulsifying the resulting dispersion in the polymerizable compound, (3) further emulsifying the resulting emulsion in an aqueous medium containing a nonionic water-soluble polymer and (4) forming the shell of the microcapsules. It is preferred that the base precursor is dispersed in water in the presence of a nonionic water-soluble polymer or an emphoteric water-soluble polymer, and the resulting dispersion is emulsified in the polymerizable compound.

Light-sensitive material containing silver halide, reducing agent,

Disclosed is a light-sensitive material comprising a support and a light-sensitive layer provided thereon which contains silver halide, a reducing agent and an ethylenically unsaturated polymerizable compound. The silver halide and the polymerizable compound are contained in oily droplets. The oily droplets are a core material of microcupsules. The oily droplet has a film therearound which is composed of a reaction product of a water-soluble polymer having a sulfinyl group with an ethylenically unsaturated polymerizable compound.

Light-sensitive material containing silver halide reducing agent and

A light-sensitive microcapsule comprises a core material containing a silver halide and an ethylenically unsaturated polymerizable compound and a shell containing a melamine derivative-aldehyde resin which encloses the core material. The melamine derivative-aldehyde resin forming the shell is produced from formaldehyde and a melamine compound which contains a specifically selected melamine derivative in an amount of at least 10 wt. %. A light-sensitive material prepared using the microcapsule is also disclosed.

Light-sensitive micropcapsule and light-sensitive material employing the

A light-sensitive material comprises a support and a light-sensitive layer containing silver halide, a reducing agent, a polymerizable compound and a base or base precursor. The silver halide, reducing agent and polymerizable compound are contained in microcapsules which are dispersed in the light-sensitive layer. The base or base precursor is arranged outside of the microcapsules. The light-sensitive layer further contains a polar compound having a melting point in the range of 30.degree. to 250.degree. C., which is arranged outside of the microcapsules. The polar compound may be arranged inside and outside of the microcapsules.

A light-sensitive material comprises a light-sensitive layer provided on a support wherein the light-sensitive layer contains a silver halide, a polymerizable compound, a reducing agent and two components which give a color in contact with each other. One of the components, the silver halide and the polymerizable compound, are together contained in one microcapsule to form a light-sensitive microcapsule. The other component is contained in other microcapsule(s). A mean particle size of the microcapsule containing the other component is larger than that of the light-sensitive microcapsule.

Growing community of inventors

Kanagawa, Japan

Ryuichi Takahashi