초록 ▼

A photographic silver halide material with at least one halide emulsion layer and at least one substance in heterogeneous contribution emulsified in oilformer compounds and a process of preparing the said photographic silver halide materials. The substances are introduced into photographic emulsions

A photographic silver halide material with at least one halide emulsion layer and at least one substance in heterogeneous contribution emulsified in oilformer compounds and a process of preparing the said photographic silver halide materials. The substances are introduced into photographic emulsions prior to coating by way of adding a hydrophilic phase containing in emulsified form the substances which are emulsified in the hydrophilic phase in form of a solution containing at least one substantially diffusion-resistant, substantially water-insoluble, substantially non-coupling dispersible bbbb

대표청구항 ▼

A process for the production of photographic layers containing emulsified substances in heterogeneous distribution comprising the step of emulsifying the substances in solubilized form into a hydrophilic phase in the presence of an oilformer compound and applying the emulsion formed to a substrate,

A process for the production of photographic layers containing emulsified substances in heterogeneous distribution comprising the step of emulsifying the substances in solubilized form into a hydrophilic phase in the presence of an oilformer compound and applying the emulsion formed to a substrate, the emulsified substances are selected from the group consisting of couplers, UV-absorbers, white toners or stabilizers (to dissolve said substances, wherein the improvement comprises providing a substantially diffusion-resistant, substantially water-insoluble, substantially non-coupling oilformer compound which is of the formula R1 －CO －CH2 －R2 wherein R2 represents a cyano group or the group COR3, R1 and R3 represents alike or different groups selected of linear or branched chain alkyl with up to 20 carbon atoms, cyclohexyl and cyclopentyl groups, aryl groups, aralkyl groups, alkoxy groups, aroxy groups and aralkoxy groups; the total number of carbon atoms in R1 and R3 amounting to at least 6, if R1 an R3 both are alkyl or together complete an alkyl substituted or aryl substituted or annelated heterocyclic, heteroaromatic or aromatic ring and the total number of carbon atoms in R1 and R3 amounting to at least 10, if R1 represents alkoxy and R3 represents alkoxy or aralkoxy, which oilformer compound is capable of stabilizing the photographic layers against the damaging influence of aldehyde-containing or releasing hardening agents.