Fuji Photo Film Company, Limited

Yoshiyuki Nakazawa

Akira Sato

Reiichi Ohi

Tohru Sueyoshi

Yasuharu Nakamura

Junichi Matsuyama

Yosuke Nakajima

Tokiharu Kondo, Deceased

By Yoshiharu Kondo, Legal Representative

Yoshuhara Nakamura

Tokiharu Kondo

A silver halide emulsion for recording electron rays which comprises a silver halide emulsion containing silver halide grains having an average particle size below 0.2 microns and at least one sensitizing dye represented by the following formula: ##SPC1## Wherein Z.sub.1 represents a group of atoms necessary to form a benzene ring or naphthalene ring, said benzene or naphthalene ring being substituted or unsubstituted, Z.sub.2 represents a group of atoms necessary to form a 5-member or 6-member heterocyclic nucleus, R.sub.1, R.sub.2 and R.sub.3 each represents an alkyl group, a substituted alkyl group or an aryl group, L.sub.1, L.sub.2 and L.sub.3 each represents a methine group or a substituted methine group, said R.sub.1 and L.sub.1, R.sub.2 and L.sub.1 or R.sub.3 and L.sub.3 may be linked by an alkylene group, m and n each represents 1 or 2, X represents an acid anion, and p represents 1 or 2, is disclosed.

Silver halide emulsions for recording electron rays

Fine grain silver halide photographic emulsions adapted for electron beam recording containing at least one compound represented by the following formula; ##SPC1## Wherein A represents an aliphatic group (substituted or unsubstituted), preferably an alkyl group, a substituted alkyl group, an aryl group, a substituted aryl group or a 5- or 6-membered heterocyclic ring containing at least one nitrogen atom, R.sub.1 and R.sub.2 represent a hydrogen atom or a lower alkyl group, and n represents 0 or 1.

Silver halide photographic emulsions used for electron beam recording

Holographic silver halide elements are disclosed comprising fine silver halide particles spectrally sensitized with dyes sensitive in the 615-660 m.mu. region. The dyes are of the formula: ##EQU1## WHEREIN Z.sub.1 and Z.sub.2 are heterocyclic rings as defined in the specification and R, R.sub.1, R.sub.2, R.sub.3 and L are defined in the specification.

Fine grain silver halide emulsions with polyheteronuclear sensitizing

A silver halide photographic material having increased sensitivity and gradient and being free from fog formation on storage, comprising a support and an emulsion layer containing very fine silver halide grains and containing a nitrogen-containing heterocyclic organic compound having a hydroxylamino group, such as 2-hydroxylamino-4,6-di(ethylamino)-1,3,5-triazine or 2,4-di(hydroxylamino)-6-diethylamino-1,3,5-triazine. The photographic material is useful for recording fine images with a superior sharpness, and the incorporation of the heterocyclic compound increases the sensitivity in spite of the fine grain size of the silver halide.

Photographic material containing fine silver halide particles and

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Minami-ashigara, Japan

Yoshiyuki Nakazawa