摘要:
A direct positive type silver halide photographic material is described, which contains at least one compound represented by the following formula (I) and at least one cyanine dye having a pyrazolo[5,1-b]quinazolone nucleus and a cyanine heterocycle nucleus, wherein a carbon atom at 3-position of the pyrazolo[5,1-b]quinazolone nucleus is bonded through a four-methine chain to an atom at the 2-position or 4-position of the cyanine heterocycle nucleus, provided that the 4-position is possible only when the cyanine heterocycle nucleus is a quinoline or pyridine nucleus: ##STR1## wherein R.sub.1, R.sub.2, R.sub.3 and R.sub.4 each represents an alkyl group, an aryl group or a heterocyclic group, which may be substituted; V.sub.1, V.sub.2, V.sub.3, V.sub.4, V.sub.5, V.sub.6, V.sub.7 and V.sub.8 each represents a hydrogen atom or a monovalent substituent; L.sub.1, L.sub.2 and L.sub.3 each represents a substituted or unsubstituted methine group; M.sub.1 represents a charge-neutralizing counter ion; and m.sub.1 is a number of 0 or larger necessary for intramolecular charge neutralization.
摘要:
Disclosed are a silver halide photographic material containing at least one merocyanine color-sensitizing dye having a particular structure of formula (I) ##STR1## wherein R.sub.1 and R.sub.2 each represent an alkyl group having a residue capable of making the compound soluble in water as a free acid or salt; V.sub.1, V.sub.2, V.sub.3 and V.sub.4 each represent a hydrogen atom or a monovalent substituent, provided that these substituents (V.sub.1, V.sub.2, V.sub.3, V.sub.4) are not bonded to each other to form a ring and that the sum of the molecular weights of V.sub.1, V.sub.2, V.sub.3 and V.sub.4 is from 4 to 50; L.sub.1, L.sub.2, L.sub.3 and L.sub.4 each represent an optionally substituted methine group; M.sub.1 represents a charge-neutralizing pair ion; and m.sub.1 represents a number of from 0 to 4 that is necessary for neutralizing the intramolecular charge.
摘要:
A lithographic printing plate precursor includes an image-recording layer and a protective layer containing a stratiform compound, wherein at least one of the image-recording layer and the protective layer contains a polymer containing as a repeating unit, a structural unit having an ammonium structure.
摘要:
A lithographic printing plate precursor capable of being subjected to on-press development by supplying at least one of printing ink and dampening water and including a support, an image-recording layer and optionally an undercoat layer between the support and the image-recording layer, wherein at least one of the undercoat layer and the image-recording layer contains at least one of a compound represented by the formula (1A) as defined herein and a compound including a structure represented by the formula (1B) as defined herein.
摘要:
A method for producing a cellulose acylate having a predetermined substitution degrees, which comprises acylating cellulose with an esterifying agent that contains an excessive amount of an acid anhydride relative to the hydroxyl group of cellulose, and mixing the reaction mixture with a water-containing reaction stopper to thereby hydrolyze the acid anhydride while controlling the temperature of the reaction mixture to fall between −30° C. and 35° C.
摘要:
A photothermographic material comprising at least (a) a photosensitive silver halide, (b) a reducible silver salt, (c) a reducing agent represented by the following formula (1), (d) a binder, and (e) a phenol compound represented by the following formula (2) on the same side of a support: wherein, in the formula (1), V1 to V8 each independently represent hydrogen atom or a substituent, L represents a bridging group consisting of —CH(V9)— or —S—, and V9 represents hydrogen atom or a substituent; wherein, in the formula (2), R1 and R2 each independently represent hydrogen atom or a substituent, X1 to X3 each independently represent hydrogen atom or a substituent, provided that the substituents represented by X1 to X3 do not represent hydroxy group, and when the substituents represented by X1 to X3 are bonded to the phenol ring via nitrogen atoms, X1 to X3 represent a nitrogen-containing heterocyclic group or a group represented as —NH—C(═O)—R4 where R4 represents a substituent having 8-40 carbon atoms, or the substituents represented by R1, R2 and X1 to X3 may be bound to each other to form a ring. There is provided a photothermographic material, in particular, for photographic art, more specifically, for scanners, image setters and so forth, that shows high sensitivity, high Dmax (maximum density) and low fog and can provide images suitable for photographic art.
摘要:
A photothermographic material comprising light-sensitive silver halide grains, with the photosensitive material further comprising a heptamethine cyanine dye containing at least one arylthio or thienyl group as substituent.
摘要:
The present invention provides novel indolylazaphthalides represented by formula (I) described below. The indolylazaphthalides are useful as electron donative colorless dyes for preparing recording materials. Recording materials containing the novel indolylazaphthalides of formula (I) as electron donative colorless dyes provide images having blue to cyan colors at an excellent density, while suppressing light coloration in non-image areas. ##STR1## wherein R.sup.1 represents a divalent linkage group such as an alkylene group, cycloalkylene group, aralkylene group, or a phenylene group, which linkage group is linked to a bimolecular indolylazaphthalide compound to form a bis-type structure.
摘要:
A lithographic printing plate precursor capable of being subjected to on-press development by supplying at least one of printing ink and dampening water and including a support, an image-recording layer and optionally an undercoat layer between the support and the image-recording layer, wherein at least one of the undercoat layer and the image-recording layer contains at least one of a compound represented by the formula (1A) as defined herein and a compound including a structure represented by the formula (1B) as defined herein.
摘要:
A lithographic printing plate precursor, comprising a support having thereon an image-recording layer containing (A) an infrared absorbing agent, (B) a radical polymerization initiator, (C) a radical polymerizable compound, (D) a polymer compound containing a polyoxyalkylene structure and (E) an ultraviolet absorbing agent and being capable of forming an image by supplying at least one of printing ink and dampening water on a printing machine after imagewise exposure to remove an unexposed area of the image-recording layer.