US3738846A - Fogged direct positive silver halide emulsion containing a sulfonatedtriphenylmethane dye - Google Patents
Fogged direct positive silver halide emulsion containing a sulfonatedtriphenylmethane dye Download PDFInfo
- Publication number
- US3738846A US3738846A US00134046A US3738846DA US3738846A US 3738846 A US3738846 A US 3738846A US 00134046 A US00134046 A US 00134046A US 3738846D A US3738846D A US 3738846DA US 3738846 A US3738846 A US 3738846A
- Authority
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- United States
- Prior art keywords
- silver halide
- direct positive
- silver
- group
- dye
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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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- -1 silver halide Chemical class 0.000 title claims abstract description 38
- 229910052709 silver Inorganic materials 0.000 title claims abstract description 33
- 239000004332 silver Substances 0.000 title claims abstract description 33
- 239000000839 emulsion Substances 0.000 title abstract description 20
- 150000001875 compounds Chemical class 0.000 claims abstract description 23
- 239000000463 material Substances 0.000 claims abstract description 23
- ZXQHSPWBYMLHLB-BXTVWIJMSA-M 6-ethoxy-1-methyl-2-[(e)-2-(3-nitrophenyl)ethenyl]quinolin-1-ium;methyl sulfate Chemical compound COS([O-])(=O)=O.C1=CC2=CC(OCC)=CC=C2[N+](C)=C1\C=C\C1=CC=CC([N+]([O-])=O)=C1 ZXQHSPWBYMLHLB-BXTVWIJMSA-M 0.000 claims description 7
- 108010010803 Gelatin Proteins 0.000 claims description 7
- 229920000159 gelatin Polymers 0.000 claims description 7
- 239000008273 gelatin Substances 0.000 claims description 7
- 235000019322 gelatine Nutrition 0.000 claims description 7
- 235000011852 gelatine desserts Nutrition 0.000 claims description 7
- 230000001235 sensitizing effect Effects 0.000 claims description 7
- 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 claims description 5
- 239000000084 colloidal system Substances 0.000 claims description 4
- 229910021607 Silver chloride Inorganic materials 0.000 claims description 3
- SJOOOZPMQAWAOP-UHFFFAOYSA-N [Ag].BrCl Chemical compound [Ag].BrCl SJOOOZPMQAWAOP-UHFFFAOYSA-N 0.000 claims description 3
- XCFIVNQHHFZRNR-UHFFFAOYSA-N [Ag].Cl[IH]Br Chemical compound [Ag].Cl[IH]Br XCFIVNQHHFZRNR-UHFFFAOYSA-N 0.000 claims description 3
- HOLVRJRSWZOAJU-UHFFFAOYSA-N [Ag].ICl Chemical compound [Ag].ICl HOLVRJRSWZOAJU-UHFFFAOYSA-N 0.000 claims description 3
- ADZWSOLPGZMUMY-UHFFFAOYSA-M silver bromide Chemical compound [Ag]Br ADZWSOLPGZMUMY-UHFFFAOYSA-M 0.000 claims description 3
- ZUNKMNLKJXRCDM-UHFFFAOYSA-N silver bromoiodide Chemical compound [Ag].IBr ZUNKMNLKJXRCDM-UHFFFAOYSA-N 0.000 claims description 3
- HKZLPVFGJNLROG-UHFFFAOYSA-M silver monochloride Chemical compound [Cl-].[Ag+] HKZLPVFGJNLROG-UHFFFAOYSA-M 0.000 claims description 3
- ANRHNWWPFJCPAZ-UHFFFAOYSA-M thionine Chemical compound [Cl-].C1=CC(N)=CC2=[S+]C3=CC(N)=CC=C3N=C21 ANRHNWWPFJCPAZ-UHFFFAOYSA-M 0.000 claims 2
- 229910052783 alkali metal Inorganic materials 0.000 abstract description 4
- 150000003863 ammonium salts Chemical class 0.000 abstract description 4
- 229910006069 SO3H Inorganic materials 0.000 abstract 1
- 125000001424 substituent group Chemical group 0.000 abstract 1
- 125000000020 sulfo group Chemical group O=S(=O)([*])O[H] 0.000 abstract 1
- 238000004040 coloring Methods 0.000 description 16
- 239000000975 dye Substances 0.000 description 11
- 230000035945 sensitivity Effects 0.000 description 10
- 230000004304 visual acuity Effects 0.000 description 5
- 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 4
- 230000032683 aging Effects 0.000 description 3
- 239000007864 aqueous solution Substances 0.000 description 3
- KRKNYBCHXYNGOX-UHFFFAOYSA-N citric acid Chemical compound OC(=O)CC(O)(C(O)=O)CC(O)=O KRKNYBCHXYNGOX-UHFFFAOYSA-N 0.000 description 3
- 239000003086 colorant Substances 0.000 description 3
- NLKNQRATVPKPDG-UHFFFAOYSA-M potassium iodide Chemical compound [K+].[I-] NLKNQRATVPKPDG-UHFFFAOYSA-M 0.000 description 3
- 239000000243 solution Substances 0.000 description 3
- 229940090898 Desensitizer Drugs 0.000 description 2
- OAKJQQAXSVQMHS-UHFFFAOYSA-N Hydrazine Chemical compound NN OAKJQQAXSVQMHS-UHFFFAOYSA-N 0.000 description 2
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 description 2
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 229920002301 cellulose acetate Polymers 0.000 description 2
- 238000004945 emulsification Methods 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000000737 periodic effect Effects 0.000 description 2
- IOLCXVTUBQKXJR-UHFFFAOYSA-M potassium bromide Chemical compound [K+].[Br-] IOLCXVTUBQKXJR-UHFFFAOYSA-M 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- SQGYOTSLMSWVJD-UHFFFAOYSA-N silver(1+) nitrate Chemical compound [Ag+].[O-]N(=O)=O SQGYOTSLMSWVJD-UHFFFAOYSA-N 0.000 description 2
- RYYXDZDBXNUPOG-UHFFFAOYSA-N 4,5,6,7-tetrahydro-1,3-benzothiazole-2,6-diamine;dihydrochloride Chemical compound Cl.Cl.C1C(N)CCC2=C1SC(N)=N2 RYYXDZDBXNUPOG-UHFFFAOYSA-N 0.000 description 1
- AXDJCCTWPBKUKL-UHFFFAOYSA-N 4-[(4-aminophenyl)-(4-imino-3-methylcyclohexa-2,5-dien-1-ylidene)methyl]aniline;hydron;chloride Chemical compound Cl.C1=CC(=N)C(C)=CC1=C(C=1C=CC(N)=CC=1)C1=CC=C(N)C=C1 AXDJCCTWPBKUKL-UHFFFAOYSA-N 0.000 description 1
- ROPQCOBYNJQQRZ-UHFFFAOYSA-N 5-phenylphenazin-5-ium-1,3-diamine;chloride Chemical compound [Cl-].C12=CC(N)=CC(N)=C2N=C2C=CC=CC2=[N+]1C1=CC=CC=C1 ROPQCOBYNJQQRZ-UHFFFAOYSA-N 0.000 description 1
- 229920002284 Cellulose triacetate Polymers 0.000 description 1
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 1
- 235000010724 Wisteria floribunda Nutrition 0.000 description 1
- NNLVGZFZQQXQNW-ADJNRHBOSA-N [(2r,3r,4s,5r,6s)-4,5-diacetyloxy-3-[(2s,3r,4s,5r,6r)-3,4,5-triacetyloxy-6-(acetyloxymethyl)oxan-2-yl]oxy-6-[(2r,3r,4s,5r,6s)-4,5,6-triacetyloxy-2-(acetyloxymethyl)oxan-3-yl]oxyoxan-2-yl]methyl acetate Chemical compound O([C@@H]1O[C@@H]([C@H]([C@H](OC(C)=O)[C@H]1OC(C)=O)O[C@H]1[C@@H]([C@@H](OC(C)=O)[C@H](OC(C)=O)[C@@H](COC(C)=O)O1)OC(C)=O)COC(=O)C)[C@@H]1[C@@H](COC(C)=O)O[C@@H](OC(C)=O)[C@H](OC(C)=O)[C@H]1OC(C)=O NNLVGZFZQQXQNW-ADJNRHBOSA-N 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- BIVUUOPIAYRCAP-UHFFFAOYSA-N aminoazanium;chloride Chemical compound Cl.NN BIVUUOPIAYRCAP-UHFFFAOYSA-N 0.000 description 1
- QVQLCTNNEUAWMS-UHFFFAOYSA-N barium oxide Chemical compound [Ba]=O QVQLCTNNEUAWMS-UHFFFAOYSA-N 0.000 description 1
- 229910001864 baryta Inorganic materials 0.000 description 1
- 239000002585 base Substances 0.000 description 1
- 230000008033 biological extinction Effects 0.000 description 1
- 239000003638 chemical reducing agent Substances 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 150000002504 iridium compounds Chemical class 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000691 measurement method Methods 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- WSFSSNUMVMOOMR-NJFSPNSNSA-N methanone Chemical compound O=[14CH2] WSFSSNUMVMOOMR-NJFSPNSNSA-N 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 150000002894 organic compounds Chemical class 0.000 description 1
- 229920000139 polyethylene terephthalate Polymers 0.000 description 1
- 239000005020 polyethylene terephthalate Substances 0.000 description 1
- 239000004848 polyfunctional curative Substances 0.000 description 1
- ZLMJMSJWJFRBEC-OUBTZVSYSA-N potassium-40 Chemical compound [40K] ZLMJMSJWJFRBEC-OUBTZVSYSA-N 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 150000003284 rhodium compounds Chemical class 0.000 description 1
- SOUHUMACVWVDME-UHFFFAOYSA-N safranin O Chemical compound [Cl-].C12=CC(N)=CC=C2N=C2C=CC(N)=CC2=[N+]1C1=CC=CC=C1 SOUHUMACVWVDME-UHFFFAOYSA-N 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 229910001961 silver nitrate Inorganic materials 0.000 description 1
- 229910000029 sodium carbonate Inorganic materials 0.000 description 1
- 239000011780 sodium chloride Substances 0.000 description 1
- SDKPSXWGRWWLKR-UHFFFAOYSA-M sodium;9,10-dioxoanthracene-1-sulfonate Chemical compound [Na+].O=C1C2=CC=CC=C2C(=O)C2=C1C=CC=C2S(=O)(=O)[O-] SDKPSXWGRWWLKR-UHFFFAOYSA-M 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- HIFJUMGIHIZEPX-UHFFFAOYSA-N sulfuric acid;sulfur trioxide Chemical compound O=S(=O)=O.OS(O)(=O)=O HIFJUMGIHIZEPX-UHFFFAOYSA-N 0.000 description 1
- 239000004094 surface-active agent Substances 0.000 description 1
- 229910052718 tin Inorganic materials 0.000 description 1
- AAAQKTZKLRYKHR-UHFFFAOYSA-N triphenylmethane Chemical compound C1=CC=CC=C1C(C=1C=CC=CC=1)C1=CC=CC=C1 AAAQKTZKLRYKHR-UHFFFAOYSA-N 0.000 description 1
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 description 1
- 229910052721 tungsten Inorganic materials 0.000 description 1
- 239000010937 tungsten Substances 0.000 description 1
- 238000005406 washing Methods 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
- G03C1/485—Direct positive emulsions
- G03C1/48515—Direct positive emulsions prefogged
- G03C1/48523—Direct positive emulsions prefogged characterised by the desensitiser
- G03C1/4853—Direct positive emulsions prefogged characterised by the desensitiser polymethine dyes
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Silver Salt Photography Or Processing Solution Therefor (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Abstract
A direct positive photographic silver halide material containing in a silver halide emulsion layer and/or its adjacent layer a compound represented by the following general formula (I)
in which R may be the same or different and is selected from the group consisting of H, CH3, C2H5, and R'' is selected from the group consisting of H, CH3 and Cl, and S is selected from the group consisting of SO3H, and the alkali metal salts thereof and the ammonium salt thereof, and wherein the number of S substituents ranges from 1 to 3, is disclosed.
in which R may be the same or different and is selected from the group consisting of H, CH3, C2H5, and R'' is selected from the group consisting of H, CH3 and Cl, and S is selected from the group consisting of SO3H, and the alkali metal salts thereof and the ammonium salt thereof, and wherein the number of S substituents ranges from 1 to 3, is disclosed.
Description
United States Patent 1 1 Kamano et a1.
11 3J3fid6 June 12, 1973 FOGGED DIRECT POSITIVE SILVER HALIDE EMULSION CONTAINING A [73] Assignee: Fuji Photo Film Co., Ltd., Kanagawa, Japan Filed: Apr. 14, 1971 Appl. No.: 134,046
[30] Foreign Application Priority Data Apr. 14, 1970 Japan 45 311354 US. Cl. 96/139, 96/101, 96/120,
96/64 Int. Cl G03c l/08 Field of Search 96/101, 139, 120,
References Cited UNITED STATES PATENTS 11/1966 Takao et a1 96/101 X 12/1949 Stauffer et a1. 96/64 10/1958 Landow 96/101 X Primary Examiner.1. Travis Brown Assistant Examiner-Won H. Louie, Jr. Att0rneySughrue, Rothwell, Mion, Zinn & Macpeak Inventors: Hideo Kamano; Hirotetu Kato; T.-
[57] ABSTRACT A direct positive photographic silver halide material containing in a silver halide emulsion layer and/or its adjacent layer a compound represented by the following general formula (I) R s S R i in which R may be the same or different and is selected from the group consisting of H, CH C 11 and R is selected from the group consisting of H, CH and Cl, and S is selected from the group consisting of SO H, and the alkali metal salts thereof and the ammonium salt thereof, and wherein the number of S substituents ranges from 1 to 3, is disclosed.
7 Claims, No Drawings BACKGROUND OF THE INVENTION 1. Field of the Invention This invention relates to a direct positive photographic silver halide material. More particularly, this invention is concerned with a direct positive photo'- graphic silver halide material whereby a direct positive having a high contrast and high reversal sensitivity and excellent sharpness and being free from residual colors can be obtained using one exposure and one developing treatment.
2. Description of the Prior Art It is well known that, in the production of a photographic light-sensitive material of the direct positive kind, the reversal sensitivity is raised markedly by adding -a d'esensitizer or a sensitizer to a previously fogged emulsion and the sharpness of an image is improved by preventing irradiation or halation of an emulsion layer.
As the above mentioned sensitizer are known organic compounds such as pinakryptol yellow, pinakryptol green and fuchsine (US. Pat. No. 2,857,273), and compounds containing metals of Group VIII of the Periodic Table, such as rhodium compounds and iridium compounds (US. Pat. No. 2,717,833), and as the sensitizing dye are known cyanine and merocyanine dyes.
There are various antihalation dyes for photographic light-sensitive materials yet not as many anti-halation dyes for direct positive light-sensitive materials.
It is a principal object of the invention to produce a direct positive photographic silver halide material having a high reversal sensitivity, an excellent image sharpness, and a high contrast and which is free from residual colors.
SUMMARY OF THE INVENTION This object can be accomplished by incorporating in an emulsion layer and/or an adjacent layer a dye represented by the following general formula:
in which R may be the same or different and represents H, Ch C l-I or R represents H, CH or C1, and S represents SO H or its alkali metal salt or ammonium salt, the number of S being 1 to 3.
DESCRIPTION OF THE INVENTION Examples of compounds which can be used in the invention are given as follows:
As is well known, these compounds can be prepared by sulfonating a triphenylmethane dye with fuming sulfuric acid, (e.g., Color Index No. 42650, 42745, 42735, 42685, 42690 and 42695).
It is now found that the compounds represented by the above described general formula have no influence on ordinary silver halide emulsions, but, for direct positive silver halide emulsions, they are able to sensitize spectrally and to raise the reversal sensitivity markedly.
Up to the present time, a desensitizer, a sensitizing dye and an antihalation dye, i.e. three types of chemicals have been used, but, when using the abovedescribed compound, only one type serves to accomplish the objects of obtaining high sensitivity, high contrast, less residual color and excellent positive image sharpness.
The photographic silver halide emulsion is a dispersion of silver chloride, silver chlorobromide, silver bromide, silver iodobromide, silver chloroiodide or silver chloroiodobromide in gelatin or a hydrophilic organic colloid as a protective colloid. A salt of metal belonging to Group VIII of the periodic table may be added to the emulsion during emulsification of the silver halide or during the physical ageing thereof, or a gold salt may be added during the formation of fogged nuclei. The above-described compound may be added in any step of the preparation process of an emulsion but most preferably is added after the formation of fogged nuclei and before the coating. The amount added, which depends on the emulsion used, preferably is from 0.1 to 10 g per 1 mol of silver halide.
In the invention, the combined use of known pinakryptol yellow or phenosafranine as a desensitizer, and a sensitizing cyanine dye in addition to the above described compound results in good effects.
Preparation of the direct positive photographic silver halide material according to the invention is carried out by subjecting a silver halide emulsion obtained through conventional emulsification and physical ageing to a known procedure such as radiation of light or addition of a reducing agent, for example, formaldehyde, hydrazine or thiourea dioxide whereby fogged nuclei are formed, and applying to a support member, such as a cellulose acetate film, a polyethylene terephthalate film, a baryta film or a synthetic paper followed by drying. Conventionally used photographic additives such as hardener and surfactant may be used.
The direct positive photographic silver halide material of the invention, as will be evident from the following examples, has a high sensitivity and an excellent image sharpness and a high contrast. Moreover, it is free from residual colors.
The following examples are given to illustrate the invention in greater detail without intending to limit it.
EXAMPLE l To a 10 percent aqueous solution of gelatin were added simultaneously an aqueous solution containing 100 g of silver nitrate and an aqueous solution containing 6 g of sodium chloride and 70 g of potassium bromide and reacted at 50C to form fine grains of silver halide.
Thereafter, 1 g of potassium iodide and 40 g of gelatin were added and the, pH was adjusted to 9.5 with sodium carbonate.
Five ml of 1 percent hydrazine hydrochloride was added and aged at 50C for 40 minutes to form fogged nuclei. After ageing, the pH was adjusted to 6.0 with i0 percent citric acid. After cooling and washing with water, Coloring Matter A (Compound of the Invention) and Coloring Matter B were added as shown in Table l. At the same time, pinakryptol yellow (Coloring Matter C) and 5,525, 6-dibenzo-3,3'-diethyloxacarbocyanine iodide (Coloring Matter D) were jointly used. Comparison samples were prepared by using Coloring Matter B or Coloring Matter C alone or in admixture in a similar manner.
Coloring Matter A S02NH4 S03 Hacl NHz Coloring Matter B N112 Coloring Matter C Coloring Matter D Amount Added (g/mol Ag) Coloring Matter Emulsion No. A B C D Each of the above described emulsions was coated onto a cellulose acetate film and dried. The resulting direct positive photographic silver halide material was exposed for 5 seconds using a tungsten bulb as a light source at 2660K through an optical wedge for sensitometry and then developed at 20C for 3 minutes with the following developer. The sensitivity, resolving power, gradation and residual color of the resulting sample are shown in Table 2.
Composition of Developer Sensitivity: Log E of fog density density [.0 Resolving Power: Using the measurement method of resolving power of the Koana type Gradation: average gradient between Point (fog density density 0.] and Point (fog density density 2.0)
It is evident from Table 2 that the samples 4, 6 and 9 containing Coloring Matter A according to the invention give excellent resolving power, high sensitivity and high contrast and residual color free features.
EXAMPLE 2 Three gelatin solutions were prepared from 100ml of a percent gelatin solution with addition of Coloring- Matter A (Compound of the Invention) or Coloring Matter B so as to give a same extinction density for a light of 550 mg, or without addition thereof.
Each of these solutions was coated onto a base member of cellulose triacetate film to give a thickness of 2 microns and dried to form a first layer for antihalation.
Emulsion No. 7 of Example 1 was further coated onto the first layer to give a thickness of 3 microns and dried. The resulting samples were tested in the same method as that of Example 1 to obtain results as shown It is evident from Table 3 that the use of Coloring Matter A in the first layer gives a high resolving power, a high contrast and residual color-free positive.
EXAMPLE 3 When using Coloring Matters F8 in place of Coloring Matter A in Examples 1 and 2, substantially similar results were obtained.
What is claimed is:
l. A spectrally sensitized direct positive photographic silver halide material containing in a layer of a uniformly fogged silver halide emulsion and/or in a layer adjacent said layer of a uniformly fogged silver halide emulsion a compound represented by the following general formula (I) in which R may be the same or different and is selected from the group consisting of H, CH C H and R is selected from the group consisting of H, CH and Cl and S is selected from the group consisting of SO H, and the alkali metal salts thereof and the ammonium salt thereof, and wherein the number of S substituents ranges from 1 to 3, the amount of said compound being effective to increase the reversal sensitivity of said uniformly fogged silver halide emulsion.
2. The direct positive photographic silver halide material of claim 1, containing pinakryptol yellow in addition to the compound represented by General Formula 7 3. The direct positive photographic silver halide material ofclaim 1, containing a cyanine or a merocyanine sensitizing dye in addition to the compound represented by General Formula (I).
4. The direct positive photographic silver halide ma-' terial of claim 1, containing pinakryptol yellow and a cyanine or a merocyanine sensitizing dye in addition to the compound represented by General Formula (I).
5. The material of claim 1 wherein from 0.1 to 10 g per one mol of silver halide of said compound is added.
6. The material of claim 1 wherein said silver halide is selected from the group consisting of silver chloride, silver chlorobromide, silver bromide, silver iodobromide, silver chloroiodide or silver chloroiodobromide in gelatin or a hydrophilic organic colloid.
7. The material of claim 1 wherein said compound is I a? (H f 803" C I SOJNIII
Claims (6)
- 2. The direct positive photographic silver halide material of claim 1, containing pinakryptol yellow in addition to the compound represented by General Formula (I).
- 3. The direct positive photographic silver halide material of claim 1, containing a cyanine or a merocyanine sensitizing dye in addition to the compound represented by General Formula (I).
- 4. The direct positive photographic silver halide material of claim 1, containing pinakryptol yellow and a cyanine or a merocyanine sensitizing dye in addition to the compound represented by General Formula (I).
- 5. The material of claim 1 wherein from 0.1 to 10 g per one mol of silver halide of said compound is added.
- 6. The material of claim 1 wherein said silver halide is selected from the group consisting of silver chloride, silver chlorobromide, silver bromide, silver iodobromide, silver chloroiodide or silver chloroiodobromide in gelatin or a hydrophilic organic colloid.
- 7. The material of claim 1 wherein said compound is selected from the group consisting of:
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP45031854A JPS4912653B1 (en) | 1970-04-14 | 1970-04-14 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| US3738846A true US3738846A (en) | 1973-06-12 |
Family
ID=12342622
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US00134046A Expired - Lifetime US3738846A (en) | 1970-04-14 | 1971-04-14 | Fogged direct positive silver halide emulsion containing a sulfonatedtriphenylmethane dye |
Country Status (7)
| Country | Link |
|---|---|
| US (1) | US3738846A (en) |
| JP (1) | JPS4912653B1 (en) |
| BE (1) | BE765715A (en) |
| CA (1) | CA980162A (en) |
| DE (1) | DE2118115C3 (en) |
| FR (1) | FR2089635A5 (en) |
| GB (1) | GB1335422A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3867149A (en) * | 1972-05-04 | 1975-02-18 | Konishiroku Photo Ind | Fogged, direct-positive silver halide photographic material containing a rhodium salt desensitizer and a bispyrazolone dye stabilizer |
| US4497894A (en) * | 1982-09-22 | 1985-02-05 | Mitsubishi Paper Mills, Ltd. | Colored silver halide photographic photosensitive materials |
-
1970
- 1970-04-14 JP JP45031854A patent/JPS4912653B1/ja active Pending
-
1971
- 1971-04-14 DE DE2118115A patent/DE2118115C3/en not_active Expired
- 1971-04-14 CA CA110,252A patent/CA980162A/en not_active Expired
- 1971-04-14 FR FR7113129A patent/FR2089635A5/fr not_active Expired
- 1971-04-14 US US00134046A patent/US3738846A/en not_active Expired - Lifetime
- 1971-04-14 BE BE765715A patent/BE765715A/en unknown
- 1971-04-19 GB GB2728171*A patent/GB1335422A/en not_active Expired
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3867149A (en) * | 1972-05-04 | 1975-02-18 | Konishiroku Photo Ind | Fogged, direct-positive silver halide photographic material containing a rhodium salt desensitizer and a bispyrazolone dye stabilizer |
| US4497894A (en) * | 1982-09-22 | 1985-02-05 | Mitsubishi Paper Mills, Ltd. | Colored silver halide photographic photosensitive materials |
Also Published As
| Publication number | Publication date |
|---|---|
| GB1335422A (en) | 1973-10-31 |
| DE2118115C3 (en) | 1975-06-05 |
| JPS4912653B1 (en) | 1974-03-26 |
| CA980162A (en) | 1975-12-23 |
| BE765715A (en) | 1971-08-30 |
| DE2118115A1 (en) | 1971-10-28 |
| DE2118115B2 (en) | 1974-10-17 |
| FR2089635A5 (en) | 1972-01-07 |
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