US2824001A - Stabilized photographic silver halide emulsions - Google Patents
Stabilized photographic silver halide emulsions Download PDFInfo
- Publication number
- US2824001A US2824001A US559097A US55909756A US2824001A US 2824001 A US2824001 A US 2824001A US 559097 A US559097 A US 559097A US 55909756 A US55909756 A US 55909756A US 2824001 A US2824001 A US 2824001A
- Authority
- US
- United States
- Prior art keywords
- emulsions
- silver halide
- fog
- photographic
- group
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- 239000000839 emulsion Substances 0.000 title claims description 56
- 229910052709 silver Inorganic materials 0.000 title claims description 16
- 239000004332 silver Substances 0.000 title claims description 16
- -1 silver halide Chemical class 0.000 title claims description 16
- 150000001875 compounds Chemical class 0.000 claims description 22
- 239000003795 chemical substances by application Substances 0.000 description 7
- 125000000217 alkyl group Chemical group 0.000 description 6
- 230000002401 inhibitory effect Effects 0.000 description 6
- 238000000034 method Methods 0.000 description 5
- 230000035945 sensitivity Effects 0.000 description 5
- 239000000243 solution Substances 0.000 description 5
- 239000000975 dye Substances 0.000 description 4
- 238000011534 incubation Methods 0.000 description 4
- 238000005259 measurement Methods 0.000 description 4
- 230000003287 optical effect Effects 0.000 description 4
- 150000003839 salts Chemical class 0.000 description 4
- 230000001235 sensitizing effect Effects 0.000 description 4
- 230000000087 stabilizing effect Effects 0.000 description 4
- RAIPHJJURHTUIC-UHFFFAOYSA-N 1,3-thiazol-2-amine Chemical class NC1=NC=CS1 RAIPHJJURHTUIC-UHFFFAOYSA-N 0.000 description 3
- QGJOPFRUJISHPQ-UHFFFAOYSA-N Carbon disulfide Chemical compound S=C=S QGJOPFRUJISHPQ-UHFFFAOYSA-N 0.000 description 3
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 3
- 125000003545 alkoxy group Chemical group 0.000 description 3
- 239000003054 catalyst Substances 0.000 description 3
- 238000000576 coating method Methods 0.000 description 3
- 125000004435 hydrogen atom Chemical group [H]* 0.000 description 3
- 125000002496 methyl group Chemical group [H]C([H])([H])* 0.000 description 3
- 239000000047 product Substances 0.000 description 3
- 108010010803 Gelatin Proteins 0.000 description 2
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 2
- MHAJPDPJQMAIIY-UHFFFAOYSA-N Hydrogen peroxide Chemical compound OO MHAJPDPJQMAIIY-UHFFFAOYSA-N 0.000 description 2
- KDLHZDBZIXYQEI-UHFFFAOYSA-N Palladium Chemical compound [Pd] KDLHZDBZIXYQEI-UHFFFAOYSA-N 0.000 description 2
- 241000282320 Panthera leo Species 0.000 description 2
- 125000003277 amino group Chemical group 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 2
- JYGRVMQGWVVHJE-UHFFFAOYSA-N ethyl 2-amino-2-cyanoacetate Chemical compound CCOC(=O)C(N)C#N JYGRVMQGWVVHJE-UHFFFAOYSA-N 0.000 description 2
- 229920000159 gelatin Polymers 0.000 description 2
- 239000008273 gelatin Substances 0.000 description 2
- 235000019322 gelatine Nutrition 0.000 description 2
- 235000011852 gelatine desserts Nutrition 0.000 description 2
- 229910052739 hydrogen Inorganic materials 0.000 description 2
- 239000001257 hydrogen Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- MUMZUERVLWJKNR-UHFFFAOYSA-N oxoplatinum Chemical compound [Pt]=O MUMZUERVLWJKNR-UHFFFAOYSA-N 0.000 description 2
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 description 2
- 229910003446 platinum oxide Inorganic materials 0.000 description 2
- PFNFFQXMRSDOHW-UHFFFAOYSA-N spermine Chemical compound NCCCNCCCCNCCCN PFNFFQXMRSDOHW-UHFFFAOYSA-N 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 150000003464 sulfur compounds Chemical class 0.000 description 2
- QGKMIGUHVLGJBR-UHFFFAOYSA-M (4z)-1-(3-methylbutyl)-4-[[1-(3-methylbutyl)quinolin-1-ium-4-yl]methylidene]quinoline;iodide Chemical compound [I-].C12=CC=CC=C2N(CCC(C)C)C=CC1=CC1=CC=[N+](CCC(C)C)C2=CC=CC=C12 QGKMIGUHVLGJBR-UHFFFAOYSA-M 0.000 description 1
- 208000032484 Accidental exposure to product Diseases 0.000 description 1
- QGZKDVFQNNGYKY-UHFFFAOYSA-O Ammonium Chemical compound [NH4+] QGZKDVFQNNGYKY-UHFFFAOYSA-O 0.000 description 1
- CPELXLSAUQHCOX-UHFFFAOYSA-M Bromide Chemical compound [Br-] CPELXLSAUQHCOX-UHFFFAOYSA-M 0.000 description 1
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 description 1
- OTBGYEMEWAHAFW-UHFFFAOYSA-N Cl[Br]I Chemical compound Cl[Br]I OTBGYEMEWAHAFW-UHFFFAOYSA-N 0.000 description 1
- RWSOTUBLDIXVET-UHFFFAOYSA-N Dihydrogen sulfide Chemical compound S RWSOTUBLDIXVET-UHFFFAOYSA-N 0.000 description 1
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 1
- ZLMJMSJWJFRBEC-UHFFFAOYSA-N Potassium Chemical compound [K] ZLMJMSJWJFRBEC-UHFFFAOYSA-N 0.000 description 1
- 239000007868 Raney catalyst Substances 0.000 description 1
- NPXOKRUENSOPAO-UHFFFAOYSA-N Raney nickel Chemical compound [Al].[Ni] NPXOKRUENSOPAO-UHFFFAOYSA-N 0.000 description 1
- 229910000564 Raney nickel Inorganic materials 0.000 description 1
- KJTLSVCANCCWHF-UHFFFAOYSA-N Ruthenium Chemical compound [Ru] KJTLSVCANCCWHF-UHFFFAOYSA-N 0.000 description 1
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 1
- UCKMPCXJQFINFW-UHFFFAOYSA-N Sulphide Chemical compound [S-2] UCKMPCXJQFINFW-UHFFFAOYSA-N 0.000 description 1
- 231100000818 accidental exposure Toxicity 0.000 description 1
- 239000012670 alkaline solution Substances 0.000 description 1
- 150000001412 amines Chemical class 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- 125000004429 atom Chemical group 0.000 description 1
- 238000009835 boiling Methods 0.000 description 1
- CODNYICXDISAEA-UHFFFAOYSA-N bromine monochloride Chemical compound BrCl CODNYICXDISAEA-UHFFFAOYSA-N 0.000 description 1
- 229920002678 cellulose Polymers 0.000 description 1
- 239000001913 cellulose Substances 0.000 description 1
- 229920002301 cellulose acetate Polymers 0.000 description 1
- 239000003610 charcoal Substances 0.000 description 1
- 239000000084 colloidal system Substances 0.000 description 1
- 229940125904 compound 1 Drugs 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 238000002425 crystallisation Methods 0.000 description 1
- 230000008025 crystallization Effects 0.000 description 1
- 239000002270 dispersing agent Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 125000001495 ethyl group Chemical group [H]C([H])([H])C([H])([H])* 0.000 description 1
- KIWBPDUYBMNFTB-UHFFFAOYSA-M ethyl sulfate Chemical compound CCOS([O-])(=O)=O KIWBPDUYBMNFTB-UHFFFAOYSA-M 0.000 description 1
- 239000000706 filtrate Substances 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 150000004820 halides Chemical class 0.000 description 1
- 229910000037 hydrogen sulfide Inorganic materials 0.000 description 1
- 239000003112 inhibitor Substances 0.000 description 1
- 230000005764 inhibitory process Effects 0.000 description 1
- 229910052741 iridium Inorganic materials 0.000 description 1
- GKOZUEZYRPOHIO-UHFFFAOYSA-N iridium atom Chemical compound [Ir] GKOZUEZYRPOHIO-UHFFFAOYSA-N 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 150000002731 mercury compounds Chemical class 0.000 description 1
- DZVCFNFOPIZQKX-LTHRDKTGSA-M merocyanine Chemical compound [Na+].O=C1N(CCCC)C(=O)N(CCCC)C(=O)C1=C\C=C\C=C/1N(CCCS([O-])(=O)=O)C2=CC=CC=C2O\1 DZVCFNFOPIZQKX-LTHRDKTGSA-M 0.000 description 1
- JZMJDSHXVKJFKW-UHFFFAOYSA-M methyl sulfate(1-) Chemical compound COS([O-])(=O)=O JZMJDSHXVKJFKW-UHFFFAOYSA-M 0.000 description 1
- GRVDJDISBSALJP-UHFFFAOYSA-N methyloxidanyl Chemical group [O]C GRVDJDISBSALJP-UHFFFAOYSA-N 0.000 description 1
- 229910000510 noble metal Inorganic materials 0.000 description 1
- 229910052763 palladium Inorganic materials 0.000 description 1
- 230000000737 periodic effect Effects 0.000 description 1
- 229910052697 platinum Inorganic materials 0.000 description 1
- 239000002574 poison Substances 0.000 description 1
- 231100000614 poison Toxicity 0.000 description 1
- 229920000136 polysorbate Polymers 0.000 description 1
- 229910052700 potassium Inorganic materials 0.000 description 1
- 239000011591 potassium Substances 0.000 description 1
- 125000002924 primary amino group Chemical group [H]N([H])* 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000010992 reflux Methods 0.000 description 1
- 229910052703 rhodium Inorganic materials 0.000 description 1
- 239000010948 rhodium Substances 0.000 description 1
- MHOVAHRLVXNVSD-UHFFFAOYSA-N rhodium atom Chemical compound [Rh] MHOVAHRLVXNVSD-UHFFFAOYSA-N 0.000 description 1
- 230000005070 ripening Effects 0.000 description 1
- 229910052707 ruthenium Inorganic materials 0.000 description 1
- ZUNKMNLKJXRCDM-UHFFFAOYSA-N silver bromoiodide Chemical compound [Ag].IBr ZUNKMNLKJXRCDM-UHFFFAOYSA-N 0.000 description 1
- 229910052708 sodium Inorganic materials 0.000 description 1
- 239000011734 sodium Substances 0.000 description 1
- 229940063675 spermine Drugs 0.000 description 1
- 230000002269 spontaneous effect Effects 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 239000003381 stabilizer Substances 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
- 229920003002 synthetic resin Polymers 0.000 description 1
- 239000000057 synthetic resin Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03C—PHOTOSENSITIVE MATERIALS FOR PHOTOGRAPHIC PURPOSES; PHOTOGRAPHIC PROCESSES, e.g. CINE, X-RAY, COLOUR, STEREO-PHOTOGRAPHIC PROCESSES; AUXILIARY PROCESSES IN PHOTOGRAPHY
- G03C1/00—Photosensitive materials
- G03C1/005—Silver halide emulsions; Preparation thereof; Physical treatment thereof; Incorporation of additives therein
- G03C1/06—Silver halide emulsions; Preparation thereof; Physical treatment thereof; Incorporation of additives therein with non-macromolecular additives
- G03C1/34—Fog-inhibitors; Stabilisers; Agents inhibiting latent image regression
- G03C1/346—Organic derivatives of bivalent sulfur, selenium or tellurium
Definitions
- This invention relates to fog-inhibiting agents and sta-*- bilizers for photographic emulsions, and to photographic em l i s containing th m- It is well known that photographic emulsions .on storagetend. to lose sensitivity .and to become spontaneously developable without exposure to light. Thereis normally a detectable amount of thesilver salt reducedduring de velopment in the areas where noexposure was-"given; this; is commonly called fog, and sometimes called chemical :fog? where it is necessary to distinguish be tween it and the efiects of. accidental exposure to" radi"ation; in thisinvention, we are not "concerned with the latter.
- Fog depends both on the emulsion :and the conditions of development; for a'given emulsion it increases with the. degree of development. Withconstant development conditions, it tends to increase with time, temperature and relative humidity of storage conditions; it is common practice to make accelerated tests of the stabilityofph otographic emulsions by storage at increased temperature or humidity, or both. It is, of course, desirable to have emulsions as stable as possible under the conditions of high temperature and humidity which may occur rump ical climates, for example. Fog usually appears over the whole area of the sensitive coating, but when severe, it frequently is non-uniform.
- Fog may also be caused by exposure to chemicals, for example, hydrogen sulfide and other reactive sulfur compounds, hydrogen peroxide vapor, and strongly reducing materials. While antifoggants and stabilizers may protect, to somev extent, against such eflects, it is normally understood that an antif oggantprotects against spontaneous growth of fog during prolonged storage or storage at high temperatures, and humidities, o ma mu con a n p e or both.
- chemicals for example, hydrogen sulfide and other reactive sulfur compounds, hydrogen peroxide vapor, and strongly reducing materials.
- antifoggants and stabilizers may protect, to somev extent, against such eflects, it is normally understood that an antif oggantprotects against spontaneous growth of fog during prolonged storage or storage at high temperatures, and humidities, o ma mu con a n p e or both.
- a further object of our invention is to maintain the sensitivity and fog of silver halide emulsions atlor close to initial optimum. values under keeping conditions of high temperature and humidity.
- a further ,Qbject is to prous hbt s aph sil er ha i e emulsions cont inin a t ifq san 9 s a i s,- Q h obi e s i l use ana snt rom a.
- the fog inhibitors which we propose to use are added to the emulsion duringf t-he-process of manufacture, to avoid loss of sensitivity and to inhibit the growth of fog with passage of time under non-ideal conditions of stor-
- a solution of thecompounds of the insventiori when concentration, befoi'e coatihg"," to 'unsensitized, chemically sensitized, or optically sensitized ph tographic emulsions does not appregiably .afiect the sensitometric values for sensitivity and fog when measurements are made soon after coating. When sensitometric measurements are madeat, appreciable intervals of time, at elevated temperatures and, dry or somewhat humid conditions, these compounds do stabilize photographic speed and maintain fogat a low level.
- photographic emulsions used in practicing our invention are generally of-the developing-out type; also, it is to be understood that photographic emulsions of varying halide content can advantageously be used.
- antifoggant compounds used in our invention have been found particularly useful when employed in conjunction with gelatino-silver bromiodide emulsions, although they can also be advantageously employed for stabilizing other silver halide emulsions, such as gelatinosilver chloride, bromide, chlorobromide, chlorobromiodide, etc.
- the emulsions can also be chemically sensitized by any of the accepted procedures.
- the emulsions can be digested with naturally active gelatin, or sulfur compounds can be added such as those described in Sheppard U. S. Patent 1,574,944 and U. S. 1,623,499, and Sheppard and Brigham U. S. Patent 2,410,689.
- the emulsions can also be treated with salts of the noble metals such as ruthenium, rhodium, palladium. iridium and platinum, all of which belong to group VIII of the periodic table of elements and have an atomic weight greater than 100.
- Representative compounds are ammonium chloropalladate, potassium chloroplatinate and sodium chloropalladite, which are used for sensitizing in amounts below that which produces any substantial fog inhibition, as described in Smith and Trivelli U. S. Patent 2,448,060, and as antifoggants in higher amounts, as described in Trivelli and Smith U. S. Patents 2,566,245 and 2.566.263.
- the emulsions can also be chemically sensitized with gold salts as described in Waller and Dodd U. S. Patent 2.399.083, or stabilized with gold salts as described in Damschroder U. S. Patent 2,597,856 and Yutzy and .amines such as spermine (Lowe and Allen U. S. Patent 2,521,925), or bis-(p-aminoethyl) sulfide and its water- U. S. Patent 2,521,926).
- the emulsions can also be stabilized with the mercury compounds'of Allen, Byers and Murray U. S. applica- U. S. Patent No. 2,728,663,
- the stabilizing combinations of aminothiazoles are effective in the presence or absence of optical sensitiz.
- the antifoggant and stabilizing action was determined by incubation of the emulsions for the times indicated in the following table at a temperature of 120 F. and constant relative humidity (obtained by placing the emulsions in closed containers, the ambient temperature being about F. and relative humidity about 55 percent prior to scaling the containers)
- the efficiency'of the various antifoggants was determined by measuring the speed, gamma and fog of the incubated emulsions containing an antifoggant and comparing these measurements with those of the same batch of emulsion before incubation. Also similar measurements were-madeon a photographic emulsion containing no antifoggant,'both before and after incubation.
- the tests were made using high speed silver bromiodide emulsions (coated on cellulose acetate supports), WhlCh had been panchromatically sensitized.
- the emulsions were exposedin an Eastman Type Ib sensitometer and developed, for the times indicated in the table, using the developers indicated.
- the spee'd,-gamma and fog for the emulsions were then measured as indicated above.
- the compounds of Formula I above wherein R is an alkyl group can be prepared by simply intermixing an alkaline solution of a compound of Formula I wherein R is a hydrogen atom with an alkyl salt, e. g., methyl sulphate, ethyl sulphate, etc.
- an alkyl salt e. g., methyl sulphate, ethyl sulphate, etc.
- the desired compounds separate from the aqueous solutions. It is to be understood that it is the product (or products) of this reaction which are contemplated by Formula I above wherein R is an alkyl group.
- Suitable dispersing agents for the silver halide emulsions stabilizec' according to our invention comprise gelatin, or othei as collodion, albumen, cellulose organic derivatives, synthetic resins, etc.
- a'given eniulsion will vary depending on the resence of emulsion addenda, such as che'micalsensitizers, optical sensitizers, era: In general, w have foundthat from 0.001 to 5.0 goof fog-inhibiting agent'p er mole of silver halide is sufilcient for the purposes of our invention.
- thefog inhibiting agent instead of adding,thefog inhibiting agent directly to the photographic emulsion, it is sometimes desirable to incorporate thefog-inhibiting agent in a separate layer which is placed in contact with the silver halide emulsion layer which is to be stabilized. Under such conditions, of course, it is advisable to use a higher concentration of fog-inhibiting agent than indicated above.
- R represents a member selected from the group consisting of an alkoxyl group and an amino group
- R represents a member selected from the group consisting of a hydrogen atom and a lower alkyl group.
- R represents a member selectedfrom the group consisting of an ethoxyl group and ari amino'group and R represents .a member selected from the group consisting of a hydrogen atornand a methyl group.
- a photographic silver halide emulsion containing a compound represented by the following formula:
Landscapes
- Physics & Mathematics (AREA)
- Chemical & Material Sciences (AREA)
- Spectroscopy & Molecular Physics (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- General Physics & Mathematics (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| BE554141D BE554141A (en(2012)) | 1956-01-16 | ||
| US559097A US2824001A (en) | 1956-01-16 | 1956-01-16 | Stabilized photographic silver halide emulsions |
| FR1170850D FR1170850A (fr) | 1956-01-16 | 1957-01-11 | Nouveau produit photosensible stabilisé |
| GB1589/57A GB839579A (en) | 1956-01-16 | 1957-01-16 | Improvements in photographic silver halide emulsions |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US559097A US2824001A (en) | 1956-01-16 | 1956-01-16 | Stabilized photographic silver halide emulsions |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| US2824001A true US2824001A (en) | 1958-02-18 |
Family
ID=24232260
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US559097A Expired - Lifetime US2824001A (en) | 1956-01-16 | 1956-01-16 | Stabilized photographic silver halide emulsions |
Country Status (4)
| Country | Link |
|---|---|
| US (1) | US2824001A (en(2012)) |
| BE (1) | BE554141A (en(2012)) |
| FR (1) | FR1170850A (en(2012)) |
| GB (1) | GB839579A (en(2012)) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3051570A (en) * | 1958-10-01 | 1962-08-28 | Gen Aniline & Film Corp | Antifoggants and stabilizers for photographic silver halide emulsions |
| US3068100A (en) * | 1960-11-14 | 1962-12-11 | Gen Aniline & Film Corp | N-acylhomocysteine thiolactone stabilizers for photographic silver halide emulsions |
| US3457078A (en) * | 1964-03-11 | 1969-07-22 | Agfa Ag | Supersensitized silver halide emulsions |
| US4138265A (en) * | 1977-06-27 | 1979-02-06 | Eastman Kodak Company | Antifoggants in certain photographic and photothermographic materials that include silver salts of 3-amino-1,2,4-mercaptotriazole |
| US4702999A (en) * | 1985-02-25 | 1987-10-27 | Mitsubishi Paper Mills, Ltd. | Silver halide photographic light-sensitive materials |
| US20060057509A1 (en) * | 2002-11-20 | 2006-03-16 | Konica Minolta Photo Imaging, Inc. | Silver halide photosensitive material and image forming method therefor |
| US20060121397A1 (en) * | 2003-01-31 | 2006-06-08 | Konica Minolata Photo Imaging Inc. | Silver halide emulsion silver halide photographic sensitive material and method of image formation |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2453346A (en) * | 1945-10-25 | 1948-11-09 | Eastman Kodak Co | Stabilization of processed photographic emulsions to high temperatures and humidities |
-
0
- BE BE554141D patent/BE554141A/xx unknown
-
1956
- 1956-01-16 US US559097A patent/US2824001A/en not_active Expired - Lifetime
-
1957
- 1957-01-11 FR FR1170850D patent/FR1170850A/fr not_active Expired
- 1957-01-16 GB GB1589/57A patent/GB839579A/en not_active Expired
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2453346A (en) * | 1945-10-25 | 1948-11-09 | Eastman Kodak Co | Stabilization of processed photographic emulsions to high temperatures and humidities |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3051570A (en) * | 1958-10-01 | 1962-08-28 | Gen Aniline & Film Corp | Antifoggants and stabilizers for photographic silver halide emulsions |
| US3068100A (en) * | 1960-11-14 | 1962-12-11 | Gen Aniline & Film Corp | N-acylhomocysteine thiolactone stabilizers for photographic silver halide emulsions |
| US3457078A (en) * | 1964-03-11 | 1969-07-22 | Agfa Ag | Supersensitized silver halide emulsions |
| US4138265A (en) * | 1977-06-27 | 1979-02-06 | Eastman Kodak Company | Antifoggants in certain photographic and photothermographic materials that include silver salts of 3-amino-1,2,4-mercaptotriazole |
| US4702999A (en) * | 1985-02-25 | 1987-10-27 | Mitsubishi Paper Mills, Ltd. | Silver halide photographic light-sensitive materials |
| US20060057509A1 (en) * | 2002-11-20 | 2006-03-16 | Konica Minolta Photo Imaging, Inc. | Silver halide photosensitive material and image forming method therefor |
| US7163785B2 (en) | 2002-11-20 | 2007-01-16 | Konica Minolta Photo Imaging, Inc. | Silver halide photosensitive material and image forming method therefor |
| US20060121397A1 (en) * | 2003-01-31 | 2006-06-08 | Konica Minolata Photo Imaging Inc. | Silver halide emulsion silver halide photographic sensitive material and method of image formation |
| US7220537B2 (en) | 2003-01-31 | 2007-05-22 | Konica Minolta Photo Imaging, Inc. | Silver halide emulsion silver halide photographic sensitive material and method of image formation |
Also Published As
| Publication number | Publication date |
|---|---|
| FR1170850A (fr) | 1959-01-19 |
| GB839579A (en) | 1960-06-29 |
| BE554141A (en(2012)) |
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