摘要:
A process for hardening protein-containing, preferably gelatin-containing, photographic layers wherein as hardeners unsubstituted or substituted esters of 2-substituted, 1,2-dihydroquinoline-N-carboxylic acids and/or unsubstituted or substituted esters of 1-substituted 1,2-dihydroisoquinoline-N-carboxylic acids are used.
摘要:
Colored images consisting of metal-complexed azomethine dyes are prepared by chromogenic development of silver halide photographic recording materials in the presence of color couplers. The color developers contain a grouping capable of metal chelate formation adjacent to the primary amino group. The azomethine dyes are transferred into the corresponding azomethine dye/metal complexes. The complex formation is accompanied by shift of color hue and increase of light stability.
摘要:
Protein containing photographic layers are hardened by coating with a hardening solution which contains at least one quick-acting hardener which activates carboxyl groups and at least one polysaccharide.
摘要:
1-Sulphonyl-4-amino-pyridinium salts are used as quick acting hardeners for protein-containing layers, in particular gelatine layers, for photographic purposes.
摘要:
At least one gelatin-containing layer of a photographic silver halide material is hardened with a reaction product of two compounds corresponding to the formulaeR(SO.sub.2 --CH.dbd.CH.sub.2).sub.n (A)in which R is an n-functional aliphatic, aromatic, cycloalkyl or heterocyclic group and n is an integer of from 3 to 6 and ##STR1## in which R.sub.1 and R.sub.2 may be the same or different and represent hydrogen or a lower alkyl group, R.sub.3 is an alkyl group, an aminoalkyl group a substituated or unsubstituated aromatic group, a substituated or unsubstituated 5- or 6-membered heterocyclic ring which may be attached to the N-atom of (B) either directly or through a carbon-containing group, or R.sub.2 and R.sub.3 together represent the atoms required to complete a heterocyclic ring system.
摘要:
Gelatin-containing layers of photographic materials are hardened by adding a compound containing from 2 to 6 sulfonyl ethyl sulfate groups in the form of its salts and activating the compound by adjusting a pH-value in the range from 6.5 to 11.
摘要:
A photographic material containing protein as binding agent is hardened with a compound which contains at least two free vinyl sulfonyl groups in the molecule and which is a bisulfite addition product of a compound containing up to 6 vinyl sulfonyl groups.
摘要:
As quick-acting hardeners for layers which contain protein, in particular gelatin layers for photographic purposes carbamoyl oxypyridinium salts are used.
摘要:
A photographic material comprising a support and at least one layer which comprises at least one spectrally sensitised silver halide emulsion, characterised in that the material contains at least one compound of formula and/or wherein R1 denotes H, alkyl, aryl, aralkyl, alkenyl, heterocyclyl, R2 denotes OH, NH2, NHR7, NR8R9 or R1 together with R2, denotes the atoms necessary for the completion of a heteroaliphatic ring, R3 denotes OH, NH2, NHR7, NR8R9, R4 denotes H, alkyl, aryl, aralkyl, alkenyl, heterocyclyl, R5, R6 independently of each other, denote OH, NH2, NHR10, NR11R12, or R4 together with R5, or R4 together with R6, denote the atoms necessary for the completion of a heteroaliphatic ring, and the R5 or R6 radical, which is not part of a ring, denotes OH, NH2, NHR10 or NR11R12, R7, R10 denote alkyl, aryl, aralkyl, heterocyclyl, R8, R9 independently of each other, denote alkyl, aryl, aralkyl, heterocyclyl, or R8 together with R9, denotes the atoms necessary for the completion of a heteroaliphatic ring, and R11, R12 independently of each other, denote alkyl, aryl, aralkyl, heterocyclyl, or R11 together with R12, denote the atoms necessary for the completion of a heterocyclic ring, and wherein only one of the radicals R2 and R3 and only one of the radicals R5 and R6 can denote OH or NH2, is distinguished by increased spectral sensitivity, a high sensitivity/fogging ratio and a good shelf life under humid conditions.
摘要:
The production of tabular silver bromide-iodide emulsions and silver bromide-chloride-iodide emulsions with an aspect ratio 32, an iodide content from 1 to 40 mol % and a chloride content from 0 to 20 mol %, by the process steps of (a) silver halide nucleus precipitation, and (b) at least one further precipitation of silver halide, wherein rein at least one aromatic five- or six-membered, heterocyclic compound, which is free from—SH—,—SSO2H— and—SSO2R groups, is added in an amount from 10−9 to 10−4 mol/mol silver during nucleus precipitation or during the precipitation of an inner zone of the silver halide grain which is different from the nucleus precipitate, results in an improved speed/grain size ratio and in an increased stability of a photographic material which contains an emulsion produced in this manner.