摘要:
A silver halide photographic material which provides a negative image is disclosed. The photographic material contains a compound represented by formula (I): ##STR1## wherein R represents an aliphatic group, an aromatic group, or a heterocyclic group; and Z represents an atomic group necessary to form a nitrogen-containing heterocyclic aromatic group, and provides a negative image having high contract, high sensitivity, an satisfactory dot image quality.
摘要:
A novel photographic element is disclosed. The element comprises a light-sensitive element including a light-sensitive silver halide emulsion layer coated on a support, wherein said silver halide emulsion layer or other photographic layers contain at least one development inhibitor precursor represented by formula (I) ##STR1## wherein A represents a phenyl group or a 5- or 6-membered nitrogen-containing heterocyclic ring group; L represents a chemical bond or divalent linking group; p and q each represents an integer of 1 or 2; and n represents 0 or 1.
摘要:
A hardened gelatin and a method for obtaining the hardened gelatin are described, using at least one compound represented by formula (I) ##STR1## wherein all symbols are as defined in the appended claims. The compounds of formula (I) are high in hardening speed and cause little or no post-hardening. Thus these compounds are very useful, for example, in preparation of a light-sensitive material.
摘要:
A silver halide photographic emulsion, a method of preparing the same, and a light-sensitive material containing this emulsion, wherein silver halide grains are formed while rapidly producing iodide ions from an iodide ion-releasing agent represented by Formula (I) below:R--I Formula (I)wherein R represents a monovalent organic residue which releases the iodine atom in the form of iodide ion upon reacting with a base and/or a nucleophilic reagent.
摘要:
A silver halide photographic emulsion, in which silver halide grains have been formed while iodide ions are rapidly being generated in a reactor vessel to form a silver iodide-containing region in the silver halide grains, and the silver halide grains have been spectrally sensitized by a sensitizing dye represented by the following formula (I): ##STR1## wherein Z.sub.1 and Z.sub.2.sup.- represent non-metallic atom group which form a 5- or 6-membered heterocyclic ring having nitrogen atom and carbon atom in the ring, R.sub.3 and R.sub.4 represent alkyl groups, X.sub.1.sup.- represents an anion, and p represents 1 or 2.
摘要:
A hardening method for gelatin which comprises using as a hardening agent a compound represented by formula (I) ##STR1## wherein R.sup.1, R.sup.2, R.sup.3, and R.sup.4 each represents a substituted or unsubstituted alkyl group, a substituted or unsubstituted alkenyl group, a substituted or unsubstituted aralkyl group, or a substituted or unsubstituted aryl group; or two of said R.sup.1, R.sup.2, R.sup.3, and R.sup.4 are combined with each other to form a ring (1); or 3 or more of said R.sup.1, R.sup.2, R.sup.3 and R.sup.4 are combined with each other to form a condensed ring (2); X represents a group capable of being released when the compound shown by formula (I) reacts with a nucleophilic reagent; Y.sup..crclbar. represents an anion; or Y.sup..crclbar. is combined with one of X, R.sup.1, R.sup.2, R.sup.3, and R.sup.4, ring (1), or ring (2) to form an anionic portion of an intramolecular salt.
摘要:
A method of hardening gelatin comprising adding to the gelatin to be hardened at least one compound represented by formula (I) ##STR1## wherein L represents a divalent organic group, R represents a hydrogen atom or a univalent organic group, A represents a substituted or unsubstituted benzene ring which may be condensed with another ring, M.sup..sym. represents a hydrogen ion, an alkali metal ion or an ammonium ion, and n has a value of 1 or 2 or 3. The method may be applied to various processes involving hardening of gelatin, such as processes for forming various photographic materials or microcapsules.
摘要:
A process for hardening gelatin, which comprises incorporating in a gelatin-containing material at least one hardening compound represented by formula (I) ##STR1## wherein R.sup.1 represents a substituted or unsubstituted aryl group, Z represents non-metallic atoms necessary for the formation of a nitrogen-containing heteroaromatic ring which may optionally be substituted, X.sup..crclbar. represents an anion, and n represents 0 or 1 provided that when n represents 0, the compound forms an inner salt. The gelatin hardeners can rapidly harden gelatin with little or no post-hardening and react with reactive groups of gelatin with high selectivity.
摘要:
A method for hardening gelatin is disclosed, which comprises incorporating in a gelatin-containing material at least one compound represented by formula (I) ##STR1## wherein R.sup.1, R.sup.2, R.sup.3, R.sup.4, R.sup.5, and R.sup.6 each represents an alkyl group, an alkenyl group, an aralkyl group, or an aryl group, or any two of R.sup.1 R.sup.2, R.sup.3, R.sup.4, R.sup.5, and R.sup.6 are bound to each other to form a ring, or any three or more of them are bound to each other to form a condensed ring, X represents a group capable of being eliminated when the compound represented by formula (I) reacts with a nucleophilic reagent, and Y.crclbar. represents an anion.
摘要:
A silver halide photographic emulsion comprising silver halide grains which are formed while iodide ions are rapidly being generated from an iodide ion-releasing agent represented by Formula (I) below, and which are chemically sensitized with a selenium sensitizer. Formula (I)R--Iwhere R represents a monovalent organic residue which releases the iodine atom in the form of iodide ions upon reacting with a base and/or a nucleophilic reagent.