IT1222115B - Photographic silver bromo-iodide emulsions and photographic elements - Google Patents
Photographic silver bromo-iodide emulsions and photographic elementsInfo
- Publication number
- IT1222115B IT1222115B IT21423/87A IT2142387A IT1222115B IT 1222115 B IT1222115 B IT 1222115B IT 21423/87 A IT21423/87 A IT 21423/87A IT 2142387 A IT2142387 A IT 2142387A IT 1222115 B IT1222115 B IT 1222115B
- Authority
- IT
- Italy
- Prior art keywords
- iodide
- photographic
- pbr
- jet
- emulsions
- Prior art date
Links
- 239000000839 emulsion Substances 0.000 title abstract 4
- ZUNKMNLKJXRCDM-UHFFFAOYSA-N silver bromoiodide Chemical compound [Ag].IBr ZUNKMNLKJXRCDM-UHFFFAOYSA-N 0.000 title abstract 2
- 150000004820 halides Chemical class 0.000 abstract 3
- 230000000712 assembly Effects 0.000 abstract 2
- 238000000429 assembly Methods 0.000 abstract 2
- 239000013078 crystal Substances 0.000 abstract 2
- 150000003839 salts Chemical class 0.000 abstract 2
- CPELXLSAUQHCOX-UHFFFAOYSA-M Bromide Chemical compound [Br-] CPELXLSAUQHCOX-UHFFFAOYSA-M 0.000 abstract 1
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 abstract 1
- 230000007423 decrease Effects 0.000 abstract 1
- XMBWDFGMSWQBCA-UHFFFAOYSA-N hydrogen iodide Chemical compound I XMBWDFGMSWQBCA-UHFFFAOYSA-N 0.000 abstract 1
- CBEQRNSPHCCXSH-UHFFFAOYSA-N iodine monobromide Chemical compound IBr CBEQRNSPHCCXSH-UHFFFAOYSA-N 0.000 abstract 1
- 238000004519 manufacturing process Methods 0.000 abstract 1
Landscapes
- Silver Salt Photography Or Processing Solution Therefor (AREA)
Abstract
New photographic light-sensitive silver bromo-iodide emulsions are characterised in that at least 10%, pref. at least 30%, of the total projected are of Ag halide grains comprises Ag bromo-iodide grains with at least one substantially concave major crystal face of dia. at least 0.6 microns and concavity such that at its deepest point the half-thickness of the crystal is less than 80% of the half thickness at the border. Also claimed are photographic assemblies, including colour assemblies which contain at least one such emulsion and a process for preparing the emulsions. Ag halide grains are prepd. in 3 stages: (a) double-jet pptn. at constant pBr 0.6-1.2 in presence of soluble chloride to form thick Ag halide nuclei; (b) double-jet pptn. using a Ag salt soln. at constant concentration and accelerating flow rate and a bromide + iodide soln. at increasing concentration and constant flow rate while pBr decreases about 1.2 to about 0.6. and (c) single jet addn. of Ag salt soln. until pBr rises above 1.2.
Priority Applications (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| IT21423/87A IT1222115B (en) | 1987-07-24 | 1987-07-24 | Photographic silver bromo-iodide emulsions and photographic elements |
| EP88110648A EP0300258B1 (en) | 1987-07-24 | 1988-07-04 | Photographic elements comprising light-sensitive silver bromo-iodide emulsions |
| DE88110648T DE3885023T2 (en) | 1987-07-24 | 1988-07-04 | Photographic elements containing photosensitive silver bromoiodide emulsions. |
| US07/216,670 US4952489A (en) | 1987-07-24 | 1988-07-08 | Photographic elements comprising light-sensitive silver bromo-iodide emulsions |
| JP63183418A JPH01113746A (en) | 1987-07-24 | 1988-07-22 | Photosensitive silver bromoiodide emulsion |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| IT21423/87A IT1222115B (en) | 1987-07-24 | 1987-07-24 | Photographic silver bromo-iodide emulsions and photographic elements |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| IT8721423A0 IT8721423A0 (en) | 1987-07-24 |
| IT1222115B true IT1222115B (en) | 1990-08-31 |
Family
ID=11181557
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| IT21423/87A IT1222115B (en) | 1987-07-24 | 1987-07-24 | Photographic silver bromo-iodide emulsions and photographic elements |
Country Status (1)
| Country | Link |
|---|---|
| IT (1) | IT1222115B (en) |
-
1987
- 1987-07-24 IT IT21423/87A patent/IT1222115B/en active
Also Published As
| Publication number | Publication date |
|---|---|
| IT8721423A0 (en) | 1987-07-24 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| TA | Fee payment date (situation as of event date), data collected since 19931001 |
Effective date: 19950726 |