Fuji Photo Film Company, Limited

Yoshiro Kawashima

Junji Minamizono

Hiroyuki Mifune

Noriyuki Inoue

Tadao Shishido

Tadashi Ogawa

Shingo Ishimaru

Shuzo Suga

Koutaro Nakamura

Mitunori Hirano

A silver halide photographic emulsion is subjected to sulfur or gold-sulfur sensitization in the presence of a combination of (1) at least one of an organic thioether compound or a tetrasubstituted thiourea and (2) a nitrogen-containing heterocyclic compound, to achieve the prevention of pressure desensitization and safelight aptitude deterioration.

Method for producing silver halide photographic emulsion and silver

A thermodevelopable photo-recording method suitable for making bar-code labels, ID cards and the like, comprising using a thermodevelopable photo-recording material provided with thermodevelopable photo-recording layer containing at least a diazo compound and a coupler, and an electricity modulation type light shutter constructed by minute matrixes which come to be able or inable to transmit light when electric current is passed therethrough, and optionally an optical system for minizing or enlarging the final image, exposing said photo-recording material to light through a temporary image formed in said light shutter by turning on or off the electricity to pass through each of the minute matrixes, then heating said photo-recording material to get a record of the image therein.

Formulation of barcodein microencapsulated diazo thermodevelopable

A silver halide photographic light-sensitive material comprising a support having coated thereon at least one silver halide emulsion layer. The material contains at least one compound selected from the group consisting of a compound represented by the following general formula (I) and a compound represented by the following general formula (II) in at least one layer of the silver halide emulsion layer and other hydrophilic colloid layers thereof; ##STR1## wherein R represents an alkyl group having 1 to 6 carbon atoms which may be substituted, an aryl group having 6 to 11 carbon atoms which may be substituted, or an aralkyl group having 7 to 12 carbon atoms which may be substituted; A represents a .sigma. bond or a divalent connecting group which links R and the nitrogen atom; R.sub.1 and R.sub.2 are independently hydrogen, an alkyl group having 1 to 6 carbon atoms which may be substituted, or an aralkyl group having 7 to 11 carbon atoms which may be substituted, or when A represents a .sigma. bond, R.sub.1 and R.sub.2 each may represent an atomic group necessary to form a heterocyclic ring containing the quaternary nitrogen atom together with R; a and b each represents 0 or a positive integer, provided that a and b are not both 0; R.sub.3, R.sub.4, R.sub.5 and R.sub.6 each represents hydrogen or an alkyl group having 1 to 6 carbon atoms which may be substituted and when b is not 0, at least one of R.sub.5 and R.sub.6 is a different group from R.sub.3 or R.sub.4 ; B represents --COO or --SO.sub.3 ; and Z represents an atomic group necessary to form a heterocyclic ring. The photographic light-sensitive material has a high sensitivity without being accompanied by an undesirable increase in the formation of fog.

Silver halide photographic light-sensitive material

A silver halide photographic light-sensitive material is described containing a compound comprising at least one unsaturated group and at least one betaine group in at least one layer thereof. The photographic light-sensitive material has a high sensitivity without being accompanied by an undesirable increase in the formation of fog.

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Tokyo, Japan

Yoshiro Kawashima