摘要:
A silver halide photographic emulsion is disclosed, which comprises at least one dye or sensitizing dye having at least one organic counter ion; and also a silver halide photographic emulsion layer containing the above dye or sensitizing dye and a method of producing the above silver halide photographic emulsion are disclosed.
摘要:
A high-sensitivity silver halide photographic light-sensitive material is provided, which is a silver halide photographic light-sensitive material, in which a dye chromophore is adsorbed in multiple layers on the surface of a silver halide grain and at least one of the dye chromophore-containing compounds satisfies: a specific condition relating to the aggregation property, hydrophilicity/hydrophobicity or J-aggregation property; or a specific structure.
摘要:
A silver halide color photosensitive material comprising a support and, superimposed thereon, a blue-sensitive layer unit, a green-sensitive layer unit and a red-sensitive layer unit, each of these light-sensitive layer units composed of at least one silver halide emulsion layer, together with at least one nonphotosensitive layer, wherein at least one compound (A) and at least one compound (B) are contained, the compound (A) being a heterocyclic compound of less than 4.5 C log P which when added, is capable of enhancing the sensitivity of the silver halide color photosensitive material as compared with that exhibited when not added, the compound (B) being a heterocyclic compound of 4.5 or greater C log P which when added, is capable of enhancing the sensitivity of the silver halide color photosensitive material as compared with that exhibited when not added.
摘要:
A silver halide photographic emulsion is disclosed, comprising a silver halide grain having a spectral absorption maximum wavelength of less than 500 nm and a light absorption intensity of 60 or more or having a spectral absorption maximum wavelength of 500 nm or more and a light absorption intensity of 100 or more, wherein assuming that a maximum value of the spectral absorption factor of said emulsion by a sensitizing dye is Amax, the distance between the shortest wavelength showing 80% of Amax and the longest wavelength showing 80% of Amax is 20 nm or more and the distance between the shortest wavelength showing 50% of Amax and the longest wavelength showing 50% of Amax is 120 nm or less.
摘要:
Compounds represented by formula (I) and silver halide photographic materials comprising these compounds: wherein Q1 represents a methine or polymethine group necessary for completing the compound as a methine dye; Z1 represents atoms necessary to complete a 5- or 6-membered nitrogen-containing heterocyclic ring, provided that Z1 may be condensed with a ring; L1 and L2 each represent a methine group; p1 represents 0 or 1; L represents a divalent linking group and Ar represents an aromatic group, provided that L or Ar contains at least one proton dissociative group as a substituent group or a part of the linkage or aromatic group and the proton dissociative group has a pKa value of from 3 to 12; M1 represents a counter ion for charge balance; and m1 represents a number of counter ions required for neutralizing charges on the molecule, and ranges from 0 to 10.
摘要:
Disclosed is a silver halide photographic material comprising a silver halide emulsion layer containing at least one specific compound, with examples including compounds represented by formula (I), wherein an average aspect ratio of silver halide emulsion grains constituting said silver halide emulsion layer is from 8 to 100: wherein Z1 represents atoms completing a 5- or 6-membered nitrogen-containing heterocyclic ring, L1, L2, L3 and L4 each represent a methine group, V1 represents a monovalent substituent, l1 is an integer of from 0 to 4, p1 is 0 or 1, n1 is 0, 1, 2 or 3, R1 represents a hydrogen atom, an alkyl group, an aryl group or a heterocyclic group, M1 represents a counter ion for adjusting the electric charge balance, m1 is the number of counter ions necessary to render the molecule electrically neutral and ranges from 0 to 10, and La represents a methylene group.
摘要:
A silver halide photographic material which contains at least one methine compound represented by the following formula (I) or (II): wherein Z.sub.1, Z.sub.2 and Z.sub.3 each represents an atomic group necessary to form a 5- or 6-membered nitrogen-containing heterocyclic ring; R.sub.1 and R.sub.3 each represents an alkyl group; R.sub.2 represents a hydrogen atom, an alkyl group, an aryl group or a heterocyclic group; L.sub.1, L.sub.2, L.sub.3, L.sub.4, L.sub.5, L.sub.6, L.sub.7, L.sub.8 and L.sub.9 each represents a methine group; p.sub.1 and p.sub.2 each represents 0 or 1; n.sub.1 and n.sub.2 each represents 0, 1, 2, 3 or 4; M.sub.1 represents a counter ion to balance a charge; and m.sub.1 represents a number of 0 or more necessary for to neutralize a charge in the molecule; provided that at least one of R.sub.1, R.sub.2, R.sub.3, Z.sub.1, Z.sub.2, Z.sub.3, L.sub.1, L.sub.2, L.sub.3, L.sub.4, L.sub.5, L.sub.6, L.sub.7, L.sub.8 and L.sub.9 has a thioether group; ##STR1## wherein Z.sub.4, Z.sub.5 and Z.sub.6 each represents an atomic group necessary to form a 5- or 6-membered nitrogen-containing heterocyclic ring; R.sub.4 represents an alkyl group; R.sub.5 and R.sub.6 each represents a hydrogen atom, an alkyl group, an aryl group or a heterocyclic group; L.sub.10, L.sub.11, L.sub.12, L.sub.13, L.sub.14 and L.sub.15 each represents a methine group; p.sub.3 represents 0 or 1; n.sub.3 and n.sub.4 each represents 0, 1, 2, 3 or 4; M.sub.2 represents a counter ion to balance a charge; and m.sub.2 represents a number of 0 or more necessary for to neutralize a charge in the molecule; provided that at least one of R.sub.4, R.sub.5, R.sub.6, Z.sub.4, Z.sub.5, Z.sub.6, L.sub.10, L.sub.11, L.sub.12, L.sub.13, L.sub.14 and L.sub.15 has a thioether group.
摘要:
A silver halide photographic material comprising a support having provided thereon at least one silver halide emulsion layer, wherein silver halide grains of said emulsion layer are reduction sensitized and contain at least one compound represented by the following formula (I): ##STR1## wherein A represents a divalent linking group having at least one atom other than a carbon atom; Z.sub.1 represents an atomic group necessary for forming a 5- or 6-membered nitrogen-containing heterocyclic ring; L.sub.1 and L.sub.2 each represents a methine group; p.sub.1 represents 0 or 1; M.sub.1 represents a counter ion for balancing a charge; m.sub.1 represents a number of from 0 to 10 necessary for neutralizing a charge in the molecule; and Q represents a group necessary to form a methine dye.
摘要:
A silver halide photographic light-sensitive material is disclosed containing at least one methine compound represented by formula (I) or (III). Further disclosed is the methine compound represented by formula (I).
摘要:
The present invention provides a high sensitivity silver halide photographic material which minimizes the formation of fog and exhibits a small sensitivity drop during storage. A silver halide photographic material is provided comprising a compound having a methine dye and a styryl base covalently connected to each other.