US2566245A - Complex compounds of the platinum group as photographic fog inhibitors - Google Patents

Complex compounds of the platinum group as photographic fog inhibitors Download PDF

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Publication number
US2566245A
US2566245A US765818A US76581847A US2566245A US 2566245 A US2566245 A US 2566245A US 765818 A US765818 A US 765818A US 76581847 A US76581847 A US 76581847A US 2566245 A US2566245 A US 2566245A
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United States
Prior art keywords
fog
emulsion
layer
silver halide
sensitive
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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
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US765818A
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Adrian Peter H Trivelli
William F Smith
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Eastman Kodak Co
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Eastman Kodak Co
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Publication date
Priority to NL69271D priority Critical patent/NL69271C/xx
Priority to BE476364D priority patent/BE476364A/xx
Priority to NL69268D priority patent/NL69268C/xx
Priority to FR57512D priority patent/FR57512E/en
Priority to BE470282D priority patent/BE470282A/xx
Priority to NL69269D priority patent/NL69269C/xx
Priority to NL69270D priority patent/NL69270C/xx
Priority to BE476363D priority patent/BE476363A/xx
Priority to NL69470D priority patent/NL69470C/xx
Priority to GB13667/46A priority patent/GB618061A/en
Priority to GB16676/47A priority patent/GB602160A/en
Priority to US683772A priority patent/US2448060A/en
Priority to FR943206D priority patent/FR943206A/en
Application filed by Eastman Kodak Co filed Critical Eastman Kodak Co
Priority to US765818A priority patent/US2566245A/en
Priority to FR983991D priority patent/FR983991A/en
Priority to CH278967D priority patent/CH278967A/en
Priority to CH285167D priority patent/CH285167A/en
Priority to CH285163D priority patent/CH285163A/en
Priority to CH285168D priority patent/CH285168A/en
Priority to CH285162D priority patent/CH285162A/en
Priority to US792842A priority patent/US2566263A/en
Application granted granted Critical
Publication of US2566245A publication Critical patent/US2566245A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • 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
    • G03C1/08—Sensitivity-increasing substances
    • G03C1/09—Noble metals or mercury; Salts or compounds thereof; Sulfur, selenium or tellurium, or compounds thereof, e.g. for chemical sensitising

Definitions

  • This invention relates to fogwinhibiting agents and stabilizers for' photographlc emulsionsand to photographic emulsions containing: them.-
  • photographic-emulsions par' ticularly ultra-sensitive emulsions orthose con-- taining coloring sensitizers exhibit: a tendency to form a deposit of silver in the emulsionr This deposit extends more orless uniformly overthe entire emulsion and is known as fog.
  • Photo- 11 Claims, (01. 95-7) graphic fog is of two types: Eocal' andgeneralt Local fog is formed by exposure 01? the-film or: plate at undesired points aszby a little leak in General fog or as itris sometimes known chemical fog is formed in anumber of;
  • lAstilllxfurthernobiject is to provide anti-fogging agents which, improve the keeping of the-emulsion-in tropical: regions. Other objectswill appear ⁇ from the fol-:.
  • n. :..w ich R is hydrogen or an alkali metal.
  • X is a halogen atom.
  • X is a
  • halogen atom such. as chlorine or bromine
  • Suitable compounds are ammonium chloropalammonium chlororhodate,v (NI-I4) zRhCls; ammonium, chlororuthenate, (NHQaQRuCls) ammonium chloroplatinate,
  • the fog-inhibiting agents stabilize the. sensitive emulsion when the photographic element is kept for long periods of time under conditions of high temperature or humidity or both, in the same way as when the agents are used in the sensitive emulsion itself.
  • fog inhibiting-agents of our invention when used a in a. layer such as a gelatin layer contiguous to the sensitive emulsion layer, are used in the same amounts as they would be used, if incorporated In other .words, the amount of fog inhibitorper unit area of the subbing layer or overcoating layer should be the Original 6 days at 120 F. 12 days at 120 F. g 1 mo. tropical (NHdrPdClo grams perdkg.
  • emulsitized emulsions In addition to being useiul in ordinary non-sensitized emulsions they may also be used in ortho-chromatic, panchromatic and X-ray emulsions. If used with sensitizing dyes, they ma-y be added to the emulsion before or after the dyes are added.
  • Various silver salts may be used as the sensitive salt such as silver bromide, silver iodide, silver chloride and mixtures of these.
  • the dispersing agents may be gelatin or other colloid such as collodion, albumen, cellulose organic derivatives or synthetic resins.
  • a stabilized silver halide emulsion containin silver halide as the sole sensitive ingredient and containing from 0.25 gram to 3.9 grams per kilogram of silver nitrate of a salt having the structure where R is selected from the group consisting of an alkali metal and ammonium.
  • a sensitive photographic element comprising a stabilized silver halide emulsion layer containing silver halide as the sole sensitive ingredient and a gelatin layer contiguous to said emulsion layer, one of said layers containing, per unit area of said layer, from 0.25 gram to 3.9 grams per kilogram of silver nitrate used in making the emulsion in the same unit area of said layer, of a compound having the structure where M is a metal of the platinum group other than osmium, X is a halogen atom, and R is selected from the group consisting of hydrogen, ammonium, and alkali metals.
  • a sensitive photographic element comprising a stabilized silver halide emulsion layer contain ing silver halide as the sole sensitive ingredient and a gelatin la er contiguous to said emulsion layer, one of said layers containing, per unit area of said layer, from 0.25 gram to 3.9 grams per kilogram of silver nitrate used in making the emulsion in the same unit area of said layer, of ammonium chloropalladate.
  • a sensitive photographic element comprising a stabilized silver halide emulsion layer containing silver halide as the sole sensitive ingredient and a gelatin layer contiguous to said emulsion layer, one of said layers containing, per unit area of said layer, from 0.25 gram to 3.9 grams per kilogram of silver nitrate used in making the emulsion in the same unit area of said layer, of ammonium chloroiridate.
  • a sensitive photographic element comprising a stabilized silver halide emulsion layer containing silver halide as the sole sensitive ingredient and a gelatin layer over and in contact with said emulsion layer, said gelatin overcoating layer containing, per unit area of said gelatin layer, from 0.25 gram to 3.9 grams per kilogram of silver nitrate used in making the emulsion in the same unit area of said gelatin layer, of ammonium chloropalladate.

Description

Patented Aug. 28, 1951 COMPLEX COMPOUNDS OFFITTH'ELPLATINIM GROUP A PHOTOGRZALRHIG; FOG IN- HIBITOBS Adrian PetenH: Trivelli and1 Wiiliam Smith",
Rochester, NaYi, assignorsto Eastman Kodak Com'pany,.-Rochester, N. Y2", a corporation of New-J rsey No Drawing.1 AppiicationiAlugust 2. 1947. v
Serial No. 765,818,
This invention relates to fogwinhibiting agents and stabilizers for' photographlc emulsionsand to photographic emulsions containing: them.-
This application is a continuation-in-part of our application Serial No. 613,700, filed August 30, 1945, now abandoned.
It is known that photographic-emulsions; par' ticularly ultra-sensitive emulsions orthose con-- taining coloring sensitizers exhibit: a tendency to form a deposit of silver in the emulsionr This deposit extends more orless uniformly overthe entire emulsion and is known as fog. Photo- 11 Claims, (01. 95-7) graphic fog is of two types: Eocal' andgeneralt Local fog is formed by exposure 01? the-film or: plate at undesired points aszby a little leak in General fog or as itris sometimes known chemical fog is formed in anumber of;
the camera.
ways. It may be caused by the conditions under. which the film or plateisstored such, as conditions of high temperature or humidity or unusually long time off storage. The, nature. of the emulsion may also produce chemicalffogjas well as the conditions of development ofgthe emulsion as by development for protracted periods of time or at temperaturesabove normal;
Highly sensitive emulsions are more lilgely to fog than those of lower sensitivity. We are pri marily concerned with general orchemical fog.
General fog and loss, of sensitivity of the emulsion are especially likely to occur when the sensitive material is stored under conditions other than ideal, that is, under; conditions of ,high temperature and, humidity as in tropical.
regions.
It is an object of the invention to provide novel anti-fogging or fog-inhibiting compounds for emulsions, A further objectis to provide anti-fogging agents which stabilizezthe initial,
sensitivity of the emulsion. lAstilllxfurthernobiject is to provide anti-fogging agents which, improve the keeping of the-emulsion-in tropical: regions. Other objectswill appear {from the fol-:.
lowing description of our inventiom These objects are accomplished by incorporating in-a' silver halide emulsion, o v$ 13 i illcbing layer or "overcoating layer contiguous to. adja ladate, (NH4)z(PdCls);
cent to, or' in contact; with, said emulsion, an acid or a' salt having the general formula:
azcMxa) n. :..w ich R is hydrogen or an alkali metal.
M is a metal of the-platinum group other than osmium.
X is a halogen atom.
Compounds suitable foruse according to our invention are those of theabove general formula in which R is, hydrogen, ammonium or an alkali metal such as sodium or potassium, M is a metal of the platinum group such as platinum; iridium,
palladium, rhodium or ruthenium and. X is a,
halogen atom such. as chlorine or bromine; Suitable compounds are ammonium chloropalammonium chlororhodate,v (NI-I4) zRhCls; ammonium, chlororuthenate, (NHQaQRuCls) ammonium chloroplatinate,
ammonium .bromopalladate, (NHi) 2(PdBra) and ammonium I chloroiridate, (NH4)'z(Ir.C.lc) Com.-
pounds of osmium cause, desensitization and produce no fog-inhibiting effect.
Theobject of our invention is to maintain the sensitivity and fog. of 7 silver halide, emulsions. at
or closeto initial optimum values under keeping conditionsof high temperature and humidity. The fog inhibitors which we propose to use are added to. the emulsion, during the. process of manufacture to avoid loss, of sensitivity and to inhibit the growth of chemical fog with passage of time under non-ideal conditions of storage.
" A solution of ammonium chloropalladate when.
added in suitable concentration before-coating to unsensitized or optically sensitized photographic. emulsions does not afiect the, 361151110: metric values for sensitivity and fog when measurements-are made soon after coating. When. sensitometric measurements are made after an.- preciable intervals of time under tropical or dry conditions of storage at elevated temperatures, howeyer, 'thisxcoinpound' does stabilize photo.- graphic speed and'maintain fog at a low level:
The preparation. of silver halide emulsions involves three separate operations (1) the emulsiflcation and digestion or ripening of the silver halide (2) the freeing of the emulsion from excess soluble salts usually by washing, (3) the second digestion or after-ripening to obtain increased sensitivity. (Mees. The Theory of the Photographic Process, 1942.) We prefer to add the fog-inhibiting agents after the final digestion or after-ripening, although they may be added before digestion. The most useful concentration range of fog inhibitor is from 0.25 to 3.90 grams of fog inhibitor per kilogram of silver nitrate converted to silver halide.
The anti-foggant and stabilizing action was determined by incubation of the emulsions under simulated tropical conditions and also by incubation in dry heat at 120 F. for various lengths of time from 6 days to one month. The results a i of these tests are tabulated here and are compared with the initial speed, gamma and fog of the emulsions with and without the anti-foggant and stabilizing compound. The tests from which the following tabulation was made used a highspeed negative silver halide emulsion exposed on an Eastman type 13 sensitometer and developed for five minutes in a developer of the following composition Grams Monomethyl paraminophenol sulfate 2.5 Sodium suliite (desiccated) 30 I-Iydroquinone 2.5 Sodium metaborate 10 Potassium bromide 0.5'
Water to one liter The results are as follows:
' in the emulsion layer.
ammonium chlororhodate. A coating of highspeed negative emulsion was exposed on a type IIB sensitometer and developed for five minutes Grams perk of AKNOI f 111 10 1' F 10/1 em on speed Gamma g Speed Gamma Fog 795 1. 41 .11 172 l. 88 12 542 1. 44 205 1. 71 .08 400 1. 37 08 280 l. 58 06 255 1. 4B 07 270 l. 48 07 760 1. 57 12 120 l 51 13 In addition to'their use in a sensitive emulsion layer the fog inhibiting agents of our invention may be incorporated in a subbing layer or overcoating. layer contiguous to, adjacent to, or in contact with, said sensitive emulsion layer. When used in this Way, the fog-inhibiting agents stabilize the. sensitive emulsion when the photographic element is kept for long periods of time under conditions of high temperature or humidity or both, in the same way as when the agents are used in the sensitive emulsion itself. The
fog inhibiting-agents of our invention, when used a in a. layer such as a gelatin layer contiguous to the sensitive emulsion layer, are used in the same amounts as they would be used, if incorporated In other .words, the amount of fog inhibitorper unit area of the subbing layer or overcoating layer should be the Original 6 days at 120 F. 12 days at 120 F. g 1 mo. tropical (NHdrPdClo grams perdkg. of flgNOs 1/ 1/ 1/ use in emu sion 1 i 1 speed Gamma Fog speed Gamma Fog peed Gamma Fog Speed Gamma Fog One of the advantages of our invention is the fact that compounds such as ammonium chloropalladate may be prepared in a very high state of purity (Gilchrist, Chemical Reviews, vol. 30,
June 1943, page 307). Another and perhaps chief advantage is the greater extent of stabilizing action over a wide range of climatic conditions;
Similar data were obtained from a coating of V gelatino-silver halide emulsion containing ammonium chloroiridate. Plates containing varying amounts of the compound were exposed on a type IIB sensitometer and developed for five minutes in the same developer as before. results were as follows:
The
s ame,,per' kilogram of silver nitrate used in malt-.1
' ing the emulsion, as would be used in the same or overcoating. layer with an emulsion coated in the same waybutcontaining no fog inhibitor.
The following. table illustrates the incorporation of ammpnium chloropalladate in a gelatin layer coated over a negative type gelatino silver Original (N114): IrOls Grams/ 12 days at 120 F'.
1 mo. tropical Q i 3 mo. regular keeping kg. of .iXgNOQ used 10/ s 111 emu sion 1' i 10 i Gamma Fog Speed Gamma Fog Speed Gamma Fog Spa/ed Gamma Fog 1. 52 .10 455 1. 5a .46 e 265 1.59 16 525 1. .11 1. .11 I ,610 1. B2 .22 i 415 1. 2B 12 605 1. 55 11 l. 57 .11 560 1. 20 368 l. 49 14 630 1. 48 I 12 1. El .09 660 1. 52 390 1. '16 11 480 1. 64 .09
The following data were obtained from a coathalide emulsion l er'l the emulsion being exposed ing" of gelatino-silver halide emulsion containing: Quad sensitometer and devel-- oped for five minutes in the same developer as before:
Original '(NHO: PC1015 Grams 12 days at 120 F.
1 mo. tropical 2 mos. tropical per kg. of AgNOs used in emulsion l/i l/i l/i 1 i gpeed Gamma Fog speed Gamma Fog Speed Gamma Fog Sped Gamma Fog 165 1.03 .02 65 .79 .ll 61 .82 .ll 41 .90 .25 160 0. 94 .03 96 .80 .08 105 86 .04 82 .90 .07 170 1. 01 03 98 86 06' 126 88 03 B4 87 07 I The fog inhibiting agents which we have described may be used in various kinds of photographic emulsions. In addition to being useiul in ordinary non-sensitized emulsions they may also be used in ortho-chromatic, panchromatic and X-ray emulsions. If used with sensitizing dyes, they ma-y be added to the emulsion before or after the dyes are added. Various silver salts may be used as the sensitive salt such as silver bromide, silver iodide, silver chloride and mixtures of these. The dispersing agents may be gelatin or other colloid such as collodion, albumen, cellulose organic derivatives or synthetic resins.
It will be understood that we contemplate as included within our invention all modifications and equivalents falling Within the scope of the appended claims.
We claim:
1. A stabilized halide emulsion containing silver halide as the sole sensitive ingredient and containing from 0.25 gram to 3.9 grams per kilogram of silver nitrate of a compound having the structure Rama) where M is a metal of the platinum group other than osmium, X is a halogen atom, and R. is selected from the group consisting of hydrogen, ammonium and alkali metals.
2. A stabilized gelatino-silver halid emulsion containing silver halide as the sole sensitive ingredient and containing from 0.25 gram to 3.9 grams per kilogram of silver nitrate of a salt having the structure R2 (PdCls) where R is selected from the group consisting of an alkali metal and ammonium.
3. A stabilized silver halide emulsion containing silver halide as the sole sensitive ingredient and containing from 0.25 gram to 3.9 grams per kilogram of silver nitrate of ammonium chloropalladate.
4. A stabilized silver halide emulsion containing silver halide as the sole sensitive ingredient and containing approximatel 1.8 grams per kilogram of silver nitrate of ammonium chloropalladate. V
5. A stabilized silver halide emulsion containin silver halide as the sole sensitive ingredient and containing from 0.25 gram to 3.9 grams per kilogram of silver nitrate of a salt having the structure where R is selected from the group consisting of an alkali metal and ammonium.
6. A stabilized gelatino-silver halide emulsion containing silver halide as the sole sensitive ingredient and containing from 0.25 gram to 3.9
'7. A stabilized gelatino-silver halide emulsion containing silver halide as the sole sensitive ingredient and containing from 0.25 gram to 3.9 grams per kilogram of silver nitrate of ammonium chlororhodate.
8. A sensitive photographic element comprising a stabilized silver halide emulsion layer containing silver halide as the sole sensitive ingredient and a gelatin layer contiguous to said emulsion layer, one of said layers containing, per unit area of said layer, from 0.25 gram to 3.9 grams per kilogram of silver nitrate used in making the emulsion in the same unit area of said layer, of a compound having the structure where M is a metal of the platinum group other than osmium, X is a halogen atom, and R is selected from the group consisting of hydrogen, ammonium, and alkali metals.
9. A sensitive photographic element comprising a stabilized silver halide emulsion layer contain ing silver halide as the sole sensitive ingredient and a gelatin la er contiguous to said emulsion layer, one of said layers containing, per unit area of said layer, from 0.25 gram to 3.9 grams per kilogram of silver nitrate used in making the emulsion in the same unit area of said layer, of ammonium chloropalladate.
10. A sensitive photographic element comprising a stabilized silver halide emulsion layer containing silver halide as the sole sensitive ingredient and a gelatin layer contiguous to said emulsion layer, one of said layers containing, per unit area of said layer, from 0.25 gram to 3.9 grams per kilogram of silver nitrate used in making the emulsion in the same unit area of said layer, of ammonium chloroiridate.
11. A sensitive photographic element comprising a stabilized silver halide emulsion layer containing silver halide as the sole sensitive ingredient and a gelatin layer over and in contact with said emulsion layer, said gelatin overcoating layer containing, per unit area of said gelatin layer, from 0.25 gram to 3.9 grams per kilogram of silver nitrate used in making the emulsion in the same unit area of said gelatin layer, of ammonium chloropalladate.
ADRIAN P. H. TRIVELLI. WILLIAM F. SMITH.
REFERENCES CITED The following references are of record in the file of this patent:
UNITED STATES PATENTS Number Name Date 1,120,429 Willis Dec. 8, 1914 1,120,580 Willis Dec. 8, 1914

Claims (1)

1. A STABILIZED HALIDE EMULSION CONTAINING SILVER HALIDE AS THE SOLE SENSITIVE INGREDIENT AND CONTAINING FROM 0.25 GRAM TO 3.9 GRAMS PER KILOGRAM OF SILVER NITRATE OF A COMPOUND HAVING THE STRUCTURE
US765818A 1945-08-30 1947-08-02 Complex compounds of the platinum group as photographic fog inhibitors Expired - Lifetime US2566245A (en)

Priority Applications (21)

Application Number Priority Date Filing Date Title
BE476364D BE476364A (en) 1945-08-30
NL69268D NL69268C (en) 1945-08-30
FR57512D FR57512E (en) 1945-08-30 Improvements to anti-fog products for photographic emulsions
BE470282D BE470282A (en) 1945-08-30
NL69269D NL69269C (en) 1945-08-30
NL69270D NL69270C (en) 1945-08-30
BE476363D BE476363A (en) 1945-08-30
NL69470D NL69470C (en) 1945-08-30
NL69271D NL69271C (en) 1945-08-30
GB13667/46A GB618061A (en) 1945-08-30 1946-05-06 Improvements in sensitive photographic materials
GB16676/47A GB602160A (en) 1945-08-30 1946-06-14 Improvements in sensitive photographic materials
US683772A US2448060A (en) 1945-08-30 1946-07-15 Photographic emulsions sensitized with salts of metals of group viii of the periodicarrangement of the elements
FR943206D FR943206A (en) 1945-08-30 1946-08-30 Improvements to anti-fog products for photographic emulsions
US765818A US2566245A (en) 1945-08-30 1947-08-02 Complex compounds of the platinum group as photographic fog inhibitors
FR983991D FR983991A (en) 1945-08-30 1947-08-07 sensitized photographic emulsions
CH278967D CH278967A (en) 1945-08-30 1947-11-21 Photographic emulsion stable to silver halides, and process for preparing this emulsion.
CH285167D CH285167A (en) 1945-08-30 1947-11-21 Photographic silver halide stable emulsion and process for preparing this emulsion.
CH285163D CH285163A (en) 1945-08-30 1947-11-21 Photographic silver halide stable emulsion and process for preparing this emulsion.
CH285168D CH285168A (en) 1945-08-30 1947-11-21 Photographic emulsion stable to silver halides, and process for preparing this emulsion.
CH285162D CH285162A (en) 1945-08-30 1947-11-21 A stable photographic silver halide emulsion and a process for preparing this emulsion.
US792842A US2566263A (en) 1945-08-30 1947-12-19 Stabilizing photographic emulsions with chloropalladites and chloroplatinites

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
US61370045A 1945-08-30 1945-08-30
US68723946A 1946-07-30 1946-07-30
US765818A US2566245A (en) 1945-08-30 1947-08-02 Complex compounds of the platinum group as photographic fog inhibitors
US792842A US2566263A (en) 1945-08-30 1947-12-19 Stabilizing photographic emulsions with chloropalladites and chloroplatinites

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US765818A Expired - Lifetime US2566245A (en) 1945-08-30 1947-08-02 Complex compounds of the platinum group as photographic fog inhibitors
US792842A Expired - Lifetime US2566263A (en) 1945-08-30 1947-12-19 Stabilizing photographic emulsions with chloropalladites and chloroplatinites

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US792842A Expired - Lifetime US2566263A (en) 1945-08-30 1947-12-19 Stabilizing photographic emulsions with chloropalladites and chloroplatinites

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BE (3) BE476364A (en)
CH (5) CH278967A (en)
FR (3) FR943206A (en)
GB (2) GB618061A (en)
NL (5) NL69270C (en)

Cited By (23)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3023102A (en) * 1957-09-24 1962-02-27 Gen Aniline & Film Corp Direct positive photographic emulsion
US3790390A (en) * 1970-12-30 1974-02-05 Fuji Photo Film Co Ltd Photographic silver halide light-sensitive materials
US4247617A (en) * 1979-05-11 1981-01-27 Polaroid Corporation Silver diffusion transfer film unit transparency
EP0124795A2 (en) 1983-04-11 1984-11-14 Fuji Photo Film Co., Ltd. Silver halide photographic emulsion
US4617258A (en) * 1982-04-09 1986-10-14 Konishiroku Photo Industry Co., Ltd. Silver halide photographic material
EP0244200A2 (en) * 1986-04-28 1987-11-04 Minnesota Mining And Manufacturing Company Silver halide photographic materials
EP0336425A1 (en) * 1988-04-08 1989-10-11 EASTMAN KODAK COMPANY (a New Jersey corporation) Photographic emulsions containing internally modified silver halide grains
EP0336426A1 (en) * 1988-04-08 1989-10-11 EASTMAN KODAK COMPANY (a New Jersey corporation) Photographic emulsions containing internally modified silver halide grains
EP0336427A1 (en) * 1988-04-08 1989-10-11 EASTMAN KODAK COMPANY (a New Jersey corporation) Photographic emulsions containing internally modified silver halide grains
WO1989012847A1 (en) * 1988-06-20 1989-12-28 Eastman Kodak Company Photographic material protected against hydrogen cyanide gas
US4902611A (en) * 1989-01-06 1990-02-20 Leubner Ingo H Preparation of silver halide emulsions containing iridium
US5021336A (en) * 1987-04-11 1991-06-04 Agfa Gevaert Aktiengesellschaft Color photographic material
US5314670A (en) * 1991-10-30 1994-05-24 Eastman Kodak Company Recovery of rhodium values
US5582957A (en) * 1995-03-28 1996-12-10 Eastman Kodak Company Resuspension optimization for photographic nanosuspensions
US5614360A (en) * 1994-12-16 1997-03-25 Eastman Kodak Company Photographic element and coating composition
US5650265A (en) * 1995-12-22 1997-07-22 Eastman Kodak Company Silver halide light-sensitive element
US5811226A (en) * 1996-03-14 1998-09-22 Eastman Kodak Company Method of processing a silver halide photographic element which reduces fog
EP0945755A1 (en) * 1998-03-25 1999-09-29 Agfa-Gevaert N.V. A photosensitive image-forming element containing silver halide cristals internally modified with a metal-halogen-fluorine complex
US6197485B1 (en) * 1992-11-12 2001-03-06 Minnesota Mining & Manufacturing Company Photographic assemblage comprising a silver halide photographic element sealed in a closed vessel
US6284450B1 (en) 1998-03-25 2001-09-04 Agfa-Gevaert Photosensitive image-forming element containing silver halide crystals internally modified with a metal-halogen-fluorine-complex
US20060057509A1 (en) * 2002-11-20 2006-03-16 Konica Minolta Photo Imaging, Inc. Silver halide photosensitive material and image forming method therefor
WO2012035314A1 (en) 2010-09-17 2012-03-22 Fujifilm Manufacturing Europe Bv Photographic paper
WO2021213762A1 (en) 2020-04-24 2021-10-28 Fujifilm Manufacturing Europe Bv Photographic paper

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3508925A (en) * 1967-09-08 1970-04-28 Eastman Kodak Co Method for preparing gelatino emulsions containing latexes and polyvalent salts and products obtained thereby
FR2296204A1 (en) * 1974-12-27 1976-07-23 Kodak Pathe Chemical sensitization of X-ray film - by incorporating iridium - or rhodium salt and a salt of a purine base in the silver halide emulsion
US4102312A (en) * 1975-10-30 1978-07-25 Toyota Jidosha Kogyo Kabushiki Kaisha Thermally developable light-sensitive materials
JPS5969754A (en) 1982-10-14 1984-04-20 Fuji Photo Film Co Ltd Color photosensitive silver halide material
JPS59137946A (en) 1983-01-28 1984-08-08 Fuji Photo Film Co Ltd Silver halide photosensitive material
JPS60143331A (en) 1983-12-29 1985-07-29 Fuji Photo Film Co Ltd Silver halide photosensitive material
JPS61245151A (en) 1985-04-23 1986-10-31 Konishiroku Photo Ind Co Ltd Silver halide photographic sensitive material
JPS61250643A (en) 1985-04-30 1986-11-07 Konishiroku Photo Ind Co Ltd Silver halide photographic sensitive material
JPS61250645A (en) 1985-04-30 1986-11-07 Konishiroku Photo Ind Co Ltd Silver halide photographic sensitive material
EP0209118B1 (en) 1985-07-17 1991-10-23 Konica Corporation Silver halide photographic material
EP0239363B1 (en) 1986-03-25 1992-10-28 Konica Corporation Light-sensitive silver halide photographic material feasible for high speed processing
EP0476327B1 (en) 1990-08-20 1999-11-17 Fuji Photo Film Co., Ltd. Data-retainable photographic film product and process for producing color print
JP2824717B2 (en) 1992-07-10 1998-11-18 富士写真フイルム株式会社 Processing method of silver halide photographic material
EP0589460B1 (en) 1992-09-24 2000-08-09 Fuji Photo Film Co., Ltd. Method for processing a black & white silver halide light-sensitive material
JP3616130B2 (en) * 1993-06-04 2005-02-02 イーストマン コダック カンパニー Infrared-sensitive photothermographic silver halide element and image-forming medium exposure method
US5492805A (en) * 1994-06-30 1996-02-20 Minnesota Mining And Manufacturing Company Blocked leuco dyes for photothermographic elements
US5492804A (en) * 1994-06-30 1996-02-20 Minnesota Mining And Manufacturing Company Chromogenic leuco redox-dye-releasing compounds for photothermographic elements
US5928857A (en) * 1994-11-16 1999-07-27 Minnesota Mining And Manufacturing Company Photothermographic element with improved adherence between layers
US5492803A (en) * 1995-01-06 1996-02-20 Minnesota Mining And Manufacturing Company Hydrazide redox-dye-releasing compounds for photothermographic elements
US5891615A (en) * 1997-04-08 1999-04-06 Imation Corp. Chemical sensitization of photothermographic silver halide emulsions
US5939249A (en) * 1997-06-24 1999-08-17 Imation Corp. Photothermographic element with iridium and copper doped silver halide grains
JP2006247858A (en) 2005-03-08 2006-09-21 Konica Minolta Medical & Graphic Inc Printing method, block copy sheeting material and method for fitting printing plate material
JP2007041376A (en) 2005-08-04 2007-02-15 Fujifilm Holdings Corp Silver halide photosensitive material and package including the same
US7524621B2 (en) 2007-09-21 2009-04-28 Carestream Health, Inc. Method of preparing silver carboxylate soaps
US7622247B2 (en) 2008-01-14 2009-11-24 Carestream Health, Inc. Protective overcoats for thermally developable materials
US9335623B2 (en) 2014-03-24 2016-05-10 Carestream Health, Inc. Thermally developable imaging materials
US9523915B2 (en) 2014-11-04 2016-12-20 Carestream Health, Inc. Image forming materials, preparations, and compositions
US9746770B2 (en) 2015-06-02 2017-08-29 Carestream Health, Inc. Thermally developable imaging materials and methods
WO2017123444A1 (en) 2016-01-15 2017-07-20 Carestream Health, Inc. Method of preparing silver carboxylate soaps

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1120580A (en) * 1913-09-22 1914-12-08 William Willis Sensitive photographic paper and process of making the same.
US1120429A (en) * 1913-09-22 1914-12-08 William Willis Process for the production of photographic prints.

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1120580A (en) * 1913-09-22 1914-12-08 William Willis Sensitive photographic paper and process of making the same.
US1120429A (en) * 1913-09-22 1914-12-08 William Willis Process for the production of photographic prints.

Cited By (27)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3023102A (en) * 1957-09-24 1962-02-27 Gen Aniline & Film Corp Direct positive photographic emulsion
US3790390A (en) * 1970-12-30 1974-02-05 Fuji Photo Film Co Ltd Photographic silver halide light-sensitive materials
US4247617A (en) * 1979-05-11 1981-01-27 Polaroid Corporation Silver diffusion transfer film unit transparency
US4617258A (en) * 1982-04-09 1986-10-14 Konishiroku Photo Industry Co., Ltd. Silver halide photographic material
EP0124795A2 (en) 1983-04-11 1984-11-14 Fuji Photo Film Co., Ltd. Silver halide photographic emulsion
EP0244200A3 (en) * 1986-04-28 1989-02-15 Minnesota Mining And Manufacturing Company Silver halide photographic materials
EP0244200A2 (en) * 1986-04-28 1987-11-04 Minnesota Mining And Manufacturing Company Silver halide photographic materials
US5021336A (en) * 1987-04-11 1991-06-04 Agfa Gevaert Aktiengesellschaft Color photographic material
EP0336425A1 (en) * 1988-04-08 1989-10-11 EASTMAN KODAK COMPANY (a New Jersey corporation) Photographic emulsions containing internally modified silver halide grains
EP0336426A1 (en) * 1988-04-08 1989-10-11 EASTMAN KODAK COMPANY (a New Jersey corporation) Photographic emulsions containing internally modified silver halide grains
EP0336427A1 (en) * 1988-04-08 1989-10-11 EASTMAN KODAK COMPANY (a New Jersey corporation) Photographic emulsions containing internally modified silver halide grains
WO1989012847A1 (en) * 1988-06-20 1989-12-28 Eastman Kodak Company Photographic material protected against hydrogen cyanide gas
US4892808A (en) * 1988-06-20 1990-01-09 Eastman Kodak Company Photographic material protected against hydrogen cyanide gas
US4902611A (en) * 1989-01-06 1990-02-20 Leubner Ingo H Preparation of silver halide emulsions containing iridium
US5314670A (en) * 1991-10-30 1994-05-24 Eastman Kodak Company Recovery of rhodium values
US6197485B1 (en) * 1992-11-12 2001-03-06 Minnesota Mining & Manufacturing Company Photographic assemblage comprising a silver halide photographic element sealed in a closed vessel
US5614360A (en) * 1994-12-16 1997-03-25 Eastman Kodak Company Photographic element and coating composition
US5582957A (en) * 1995-03-28 1996-12-10 Eastman Kodak Company Resuspension optimization for photographic nanosuspensions
US5650265A (en) * 1995-12-22 1997-07-22 Eastman Kodak Company Silver halide light-sensitive element
US5811226A (en) * 1996-03-14 1998-09-22 Eastman Kodak Company Method of processing a silver halide photographic element which reduces fog
US5935771A (en) * 1996-03-14 1999-08-10 Eastman Kodak Company Method of processing a silver halide photographic element which reduces fog
EP0945755A1 (en) * 1998-03-25 1999-09-29 Agfa-Gevaert N.V. A photosensitive image-forming element containing silver halide cristals internally modified with a metal-halogen-fluorine complex
US6284450B1 (en) 1998-03-25 2001-09-04 Agfa-Gevaert Photosensitive image-forming element containing silver halide crystals internally modified with a metal-halogen-fluorine-complex
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
WO2012035314A1 (en) 2010-09-17 2012-03-22 Fujifilm Manufacturing Europe Bv Photographic paper
WO2021213762A1 (en) 2020-04-24 2021-10-28 Fujifilm Manufacturing Europe Bv Photographic paper

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FR943206A (en) 1949-03-02
FR983991A (en) 1951-06-29
US2566263A (en) 1951-08-28
NL69271C (en) 1900-01-01
CH285162A (en) 1952-08-31
CH285168A (en) 1952-08-31
CH285167A (en) 1952-08-31
GB618061A (en) 1949-02-16
NL69268C (en)
NL69470C (en)
CH278967A (en) 1951-11-15
NL69270C (en) 1900-01-01
FR57512E (en) 1953-01-29
GB602160A (en) 1948-05-20
BE476364A (en)
NL69269C (en)
BE476363A (en)
CH285163A (en) 1952-08-31
BE470282A (en)

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