US2604400A - Naphthyl hydrazine sulfonic acids in direct positive photographic processes - Google Patents
Naphthyl hydrazine sulfonic acids in direct positive photographic processes Download PDFInfo
- Publication number
- US2604400A US2604400A US218072A US21807251A US2604400A US 2604400 A US2604400 A US 2604400A US 218072 A US218072 A US 218072A US 21807251 A US21807251 A US 21807251A US 2604400 A US2604400 A US 2604400A
- Authority
- US
- United States
- Prior art keywords
- emulsion
- water
- naphthyl
- parts
- direct positive
- 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
- 238000000034 method Methods 0.000 title claims description 15
- 239000002253 acid Substances 0.000 title description 16
- XBCIOBSQHJYVBQ-UHFFFAOYSA-N naphthalen-1-ylhydrazine Chemical compound C1=CC=C2C(NN)=CC=CC2=C1 XBCIOBSQHJYVBQ-UHFFFAOYSA-N 0.000 title description 8
- 239000000839 emulsion Substances 0.000 claims description 58
- 229910052709 silver Inorganic materials 0.000 claims description 23
- 239000004332 silver Substances 0.000 claims description 23
- -1 SILVER HALIDE Chemical class 0.000 claims description 21
- 238000011161 development Methods 0.000 claims description 8
- 238000012360 testing method Methods 0.000 claims description 7
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 33
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 32
- QIGBRXMKCJKVMJ-UHFFFAOYSA-N Hydroquinone Chemical compound OC1=CC=C(O)C=C1 QIGBRXMKCJKVMJ-UHFFFAOYSA-N 0.000 description 18
- IOLCXVTUBQKXJR-UHFFFAOYSA-M potassium bromide Chemical compound [K+].[Br-] IOLCXVTUBQKXJR-UHFFFAOYSA-M 0.000 description 14
- GEHJYWRUCIMESM-UHFFFAOYSA-L sodium sulfite Chemical compound [Na+].[Na+].[O-]S([O-])=O GEHJYWRUCIMESM-UHFFFAOYSA-L 0.000 description 12
- OAKJQQAXSVQMHS-UHFFFAOYSA-N Hydrazine Chemical compound NN OAKJQQAXSVQMHS-UHFFFAOYSA-N 0.000 description 10
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 description 10
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 8
- 239000000203 mixture Substances 0.000 description 8
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 6
- QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 description 5
- 150000004820 halides Chemical class 0.000 description 5
- 150000003839 salts Chemical class 0.000 description 5
- 229910000029 sodium carbonate Inorganic materials 0.000 description 5
- CYXJEHCKVOQFOV-UHFFFAOYSA-N (4-amino-2-methylphenyl) hydrogen sulfate Chemical compound CC1=CC(N)=CC=C1OS(O)(=O)=O CYXJEHCKVOQFOV-UHFFFAOYSA-N 0.000 description 4
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 4
- CPELXLSAUQHCOX-UHFFFAOYSA-M Bromide Chemical compound [Br-] CPELXLSAUQHCOX-UHFFFAOYSA-M 0.000 description 4
- 229940101006 anhydrous sodium sulfite Drugs 0.000 description 4
- YCIMNLLNPGFGHC-UHFFFAOYSA-N catechol Chemical compound OC1=CC=CC=C1O YCIMNLLNPGFGHC-UHFFFAOYSA-N 0.000 description 4
- 235000015424 sodium Nutrition 0.000 description 4
- LPXPTNMVRIOKMN-UHFFFAOYSA-M sodium nitrite Chemical compound [Na+].[O-]N=O LPXPTNMVRIOKMN-UHFFFAOYSA-M 0.000 description 4
- 229940001482 sodium sulfite Drugs 0.000 description 4
- 235000010265 sodium sulphite Nutrition 0.000 description 4
- LRUDIIUSNGCQKF-UHFFFAOYSA-N 5-methyl-1H-benzotriazole Chemical compound C1=C(C)C=CC2=NNN=C21 LRUDIIUSNGCQKF-UHFFFAOYSA-N 0.000 description 3
- WFDIJRYMOXRFFG-UHFFFAOYSA-N Acetic anhydride Chemical compound CC(=O)OC(C)=O WFDIJRYMOXRFFG-UHFFFAOYSA-N 0.000 description 3
- 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 3
- VMHLLURERBWHNL-UHFFFAOYSA-M Sodium acetate Chemical compound [Na+].CC([O-])=O VMHLLURERBWHNL-UHFFFAOYSA-M 0.000 description 3
- 238000005273 aeration Methods 0.000 description 3
- 150000001875 compounds Chemical class 0.000 description 3
- 239000000975 dye Substances 0.000 description 3
- 229920000159 gelatin Polymers 0.000 description 3
- 235000019322 gelatine Nutrition 0.000 description 3
- XMBWDFGMSWQBCA-UHFFFAOYSA-N hydrogen iodide Chemical compound I XMBWDFGMSWQBCA-UHFFFAOYSA-N 0.000 description 3
- 125000001624 naphthyl group Chemical group 0.000 description 3
- NLKNQRATVPKPDG-UHFFFAOYSA-M potassium iodide Chemical compound [K+].[I-] NLKNQRATVPKPDG-UHFFFAOYSA-M 0.000 description 3
- 229910052708 sodium Inorganic materials 0.000 description 3
- 239000011734 sodium Substances 0.000 description 3
- 239000001632 sodium acetate Substances 0.000 description 3
- 235000017281 sodium acetate Nutrition 0.000 description 3
- AZQWKYJCGOJGHM-UHFFFAOYSA-N 1,4-benzoquinone Chemical compound O=C1C=CC(=O)C=C1 AZQWKYJCGOJGHM-UHFFFAOYSA-N 0.000 description 2
- JKFYKCYQEWQPTM-UHFFFAOYSA-N 2-azaniumyl-2-(4-fluorophenyl)acetate Chemical compound OC(=O)C(N)C1=CC=C(F)C=C1 JKFYKCYQEWQPTM-UHFFFAOYSA-N 0.000 description 2
- LJCWONGJFPCTTL-UHFFFAOYSA-N 4-hydroxyphenylglycine Chemical compound OC(=O)C(N)C1=CC=C(O)C=C1 LJCWONGJFPCTTL-UHFFFAOYSA-N 0.000 description 2
- ZVNPWFOVUDMGRP-UHFFFAOYSA-N 4-methylaminophenol sulfate Chemical compound OS(O)(=O)=O.CNC1=CC=C(O)C=C1.CNC1=CC=C(O)C=C1 ZVNPWFOVUDMGRP-UHFFFAOYSA-N 0.000 description 2
- WKBOTKDWSSQWDR-UHFFFAOYSA-N Bromine atom Chemical compound [Br] WKBOTKDWSSQWDR-UHFFFAOYSA-N 0.000 description 2
- 238000007362 Burton trifluoromethylation reaction Methods 0.000 description 2
- 239000001828 Gelatine Substances 0.000 description 2
- 229910021612 Silver iodide Inorganic materials 0.000 description 2
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 2
- LSNNMFCWUKXFEE-UHFFFAOYSA-N Sulfurous acid Chemical compound OS(O)=O LSNNMFCWUKXFEE-UHFFFAOYSA-N 0.000 description 2
- RAHZWNYVWXNFOC-UHFFFAOYSA-N Sulphur dioxide Chemical compound O=S=O RAHZWNYVWXNFOC-UHFFFAOYSA-N 0.000 description 2
- 229960000583 acetic acid Drugs 0.000 description 2
- ZMJZYXKPJWGDGR-UHFFFAOYSA-N aminosulfamic acid Chemical compound NNS(O)(=O)=O ZMJZYXKPJWGDGR-UHFFFAOYSA-N 0.000 description 2
- 229910021529 ammonia Inorganic materials 0.000 description 2
- GDTBXPJZTBHREO-UHFFFAOYSA-N bromine Substances BrBr GDTBXPJZTBHREO-UHFFFAOYSA-N 0.000 description 2
- 229910052794 bromium Inorganic materials 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- 239000013078 crystal Substances 0.000 description 2
- 239000012954 diazonium Substances 0.000 description 2
- 150000001989 diazonium salts Chemical class 0.000 description 2
- NSNHWTBQMQIDCF-UHFFFAOYSA-N dihydrate;hydrochloride Chemical compound O.O.Cl NSNHWTBQMQIDCF-UHFFFAOYSA-N 0.000 description 2
- MCYYJHPHBOPLMH-UHFFFAOYSA-L disodium;dioxido-oxo-sulfanylidene-$l^{6}-sulfane;hydrate Chemical compound O.[Na+].[Na+].[O-]S([O-])(=O)=S MCYYJHPHBOPLMH-UHFFFAOYSA-L 0.000 description 2
- 239000000706 filtrate Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000003287 optical effect Effects 0.000 description 2
- 239000007800 oxidant agent Substances 0.000 description 2
- 239000000047 product Substances 0.000 description 2
- WQGWDDDVZFFDIG-UHFFFAOYSA-N pyrogallol Chemical compound OC1=CC=CC(O)=C1O WQGWDDDVZFFDIG-UHFFFAOYSA-N 0.000 description 2
- 229940045105 silver iodide Drugs 0.000 description 2
- 235000010288 sodium nitrite Nutrition 0.000 description 2
- 159000000000 sodium salts Chemical class 0.000 description 2
- AKHNMLFCWUSKQB-UHFFFAOYSA-L sodium thiosulfate Chemical compound [Na+].[Na+].[O-]S([O-])(=O)=S AKHNMLFCWUSKQB-UHFFFAOYSA-L 0.000 description 2
- 235000019345 sodium thiosulphate Nutrition 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- QAOWNCQODCNURD-UHFFFAOYSA-N sulfuric acid Substances OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 2
- 238000005406 washing Methods 0.000 description 2
- AFXIMOINFOVAPV-UHFFFAOYSA-N (4-amino-2-methylphenyl) hydrogen sulfate benzene-1,4-diol Chemical compound C1(O)=CC=C(O)C=C1.S(=O)(=O)(O)OC1=C(C=C(C=C1)N)C AFXIMOINFOVAPV-UHFFFAOYSA-N 0.000 description 1
- GZPWPJCVHJJOEV-UHFFFAOYSA-N (4-bromonaphthalen-1-yl)hydrazine Chemical compound C1=CC=C2C(NN)=CC=C(Br)C2=C1 GZPWPJCVHJJOEV-UHFFFAOYSA-N 0.000 description 1
- CDAWCLOXVUBKRW-UHFFFAOYSA-N 2-aminophenol Chemical compound NC1=CC=CC=C1O CDAWCLOXVUBKRW-UHFFFAOYSA-N 0.000 description 1
- 125000001622 2-naphthyl group Chemical group [H]C1=C([H])C([H])=C2C([H])=C(*)C([H])=C([H])C2=C1[H] 0.000 description 1
- ZFIQGRISGKSVAG-UHFFFAOYSA-N 4-methylaminophenol Chemical compound CNC1=CC=C(O)C=C1 ZFIQGRISGKSVAG-UHFFFAOYSA-N 0.000 description 1
- CMOLPZZVECHXKN-UHFFFAOYSA-N 7-aminonaphthalene-1,3-disulfonic acid Chemical compound C1=C(S(O)(=O)=O)C=C(S(O)(=O)=O)C2=CC(N)=CC=C21 CMOLPZZVECHXKN-UHFFFAOYSA-N 0.000 description 1
- LSNNMFCWUKXFEE-UHFFFAOYSA-M Bisulfite Chemical compound OS([O-])=O LSNNMFCWUKXFEE-UHFFFAOYSA-M 0.000 description 1
- ADNTYVJFDLSQTP-UHFFFAOYSA-L C([O-])([O-])=O.[Na+].OC1=CC=C(C(N)C(=O)O)C=C1.[Na+] Chemical compound C([O-])([O-])=O.[Na+].OC1=CC=C(C(N)C(=O)O)C=C1.[Na+] ADNTYVJFDLSQTP-UHFFFAOYSA-L 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 description 1
- 108010010803 Gelatin Proteins 0.000 description 1
- PVNIIMVLHYAWGP-UHFFFAOYSA-N Niacin Chemical compound OC(=O)C1=CC=CN=C1 PVNIIMVLHYAWGP-UHFFFAOYSA-N 0.000 description 1
- ZLMJMSJWJFRBEC-UHFFFAOYSA-N Potassium Chemical compound [K] ZLMJMSJWJFRBEC-UHFFFAOYSA-N 0.000 description 1
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 description 1
- HOLVRJRSWZOAJU-UHFFFAOYSA-N [Ag].ICl Chemical compound [Ag].ICl HOLVRJRSWZOAJU-UHFFFAOYSA-N 0.000 description 1
- 150000007513 acids Chemical class 0.000 description 1
- 239000013543 active substance Substances 0.000 description 1
- 238000013019 agitation Methods 0.000 description 1
- 150000001412 amines Chemical class 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- MCWXGJITAZMZEV-UHFFFAOYSA-N dimethoate Chemical compound CNC(=O)CSP(=S)(OC)OC MCWXGJITAZMZEV-UHFFFAOYSA-N 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 239000008273 gelatin Substances 0.000 description 1
- 235000011852 gelatine desserts Nutrition 0.000 description 1
- 239000012362 glacial acetic acid Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 125000000717 hydrazino group Chemical group [H]N([*])N([H])[H] 0.000 description 1
- 230000007062 hydrolysis Effects 0.000 description 1
- 238000006460 hydrolysis reaction Methods 0.000 description 1
- 238000005286 illumination Methods 0.000 description 1
- 238000010348 incorporation Methods 0.000 description 1
- CBEQRNSPHCCXSH-UHFFFAOYSA-N iodine monobromide Chemical compound IBr CBEQRNSPHCCXSH-UHFFFAOYSA-N 0.000 description 1
- 239000012452 mother liquor Substances 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052700 potassium Inorganic materials 0.000 description 1
- 239000011591 potassium Substances 0.000 description 1
- 235000007715 potassium iodide Nutrition 0.000 description 1
- 229960004839 potassium iodide Drugs 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 229940079877 pyrogallol Drugs 0.000 description 1
- 230000002441 reversible effect Effects 0.000 description 1
- 230000005070 ripening Effects 0.000 description 1
- 230000001235 sensitizing effect Effects 0.000 description 1
- ADZWSOLPGZMUMY-UHFFFAOYSA-M silver bromide Chemical compound [Ag]Br ADZWSOLPGZMUMY-UHFFFAOYSA-M 0.000 description 1
- ZUNKMNLKJXRCDM-UHFFFAOYSA-N silver bromoiodide Chemical compound [Ag].IBr ZUNKMNLKJXRCDM-UHFFFAOYSA-N 0.000 description 1
- SQGYOTSLMSWVJD-UHFFFAOYSA-N silver(I) nitrate Inorganic materials [Ag+].[O-]N(=O)=O SQGYOTSLMSWVJD-UHFFFAOYSA-N 0.000 description 1
- 239000011780 sodium chloride Substances 0.000 description 1
- GGCZERPQGJTIQP-UHFFFAOYSA-N sodium;9,10-dioxoanthracene-2-sulfonic acid Chemical compound [Na+].C1=CC=C2C(=O)C3=CC(S(=O)(=O)O)=CC=C3C(=O)C2=C1 GGCZERPQGJTIQP-UHFFFAOYSA-N 0.000 description 1
- 239000012265 solid product Substances 0.000 description 1
- 150000003460 sulfonic acids Chemical class 0.000 description 1
- 229940044609 sulfur dioxide Drugs 0.000 description 1
- 235000010269 sulphur dioxide Nutrition 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
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
- G03C1/48538—Direct positive emulsions non-prefogged, i.e. fogged after imagewise exposure
- G03C1/48546—Direct positive emulsions non-prefogged, i.e. fogged after imagewise exposure characterised by the nucleating/fogging agent
- G03C1/48561—Direct positive emulsions non-prefogged, i.e. fogged after imagewise exposure characterised by the nucleating/fogging agent hydrazine compounds
Definitions
- This emulsion is prepared'by first fonic acids may be used inthe developer or emulforming ,in' the absence of ammonia and in one sion to develop direct positive images in an inor more stages silver salt grains consisting at ternal latent imageseznulsion. These compounds least partly of a silver.
- the photographic emulsion used in the process total silver halide, treating such grains with an of our invention is a gelatino-silverv halide emuliodine compound to bring the silver iodide up sion such as a silver bromide emulsion, a silver to at least 6%, ripening preferably in theabbromoiodide emulsion or .a silver chloroiodide sence of ammonia and then either washing.
- emulsion of this type is that known as Burtons emulsion, described in Wall, Inert gela me grams a El otographic Emulsions, .l92 9, pages 52and 7 K01 20 grams at 535? Burtons emulsion'is ,made' a's'jfoIlows: j' Water 5 A. site; time. Solution N0. 2 a
- silver halide grains "as"des”cribedon' pages 296 ripen at 45 'C; 'for'l'5' minutes during which timerthe gelatine dissolves.
- An internal laten image type of silver halideemulsion may be defined as one which, when a test portion is exposed to a light intensity scale for a fixed time between 'and 1 second, and
- the maximum density obtained with the surface developer is not greater- -than the maximum density obtained when the same emulsion is developed in the internal type developer.
- an internal latent image emulsiQnLWhen developed in an internal type develop er exhibits a maximum density at least 5; and preferably at'least 10, tiines the maximum density obtained when the sameemulsion is exposed in the'same way; and developed in a surface developer (E ample I)
- Ourfprocess is carriedtoutl by exposing the internallatent image'emulsion layer to an object or image and then placing the exposed emulsion layer directly in a silver halide developing solution' containing one or more of the naphthyl hydrazine sulionic aeidsliorf by incorporating the naphthyl hydrazine sulfonic acid in ,the emulsion, and placing the exposed layer in a 1 developing solution not containing the hydrazine ,compound.
- Developing agents suitable for usefin the process of our invention includethe usualphenolic or aminophenol type developingr agents such ⁇ as N-
- the developing solution should have a pH of from 8.5 to 13 depending upon the degree of activity of the particular hydrazine compound'which it contains although the preferred'range with most hydrazineeompounds, is
- sulfonic acids are suitable for use according to our invention ⁇ g NHNHz l-naphthyl hydrazine-G-sulfonic acid 7 FHN V Bellsteln 15, 645) NHNH2 l-naphthyl hydrazine-l-sulfionic acid 4-bromo-1-naphthyl hydrazineJ-sulfonic acid 7 H093 -NHNH2 2maphthjlilfidrazineW-sulfonic acid -NHVNH2 c Z-naphthyl-,lrvdrazinefi-sulfiomc'acid I (J.
- Example IV A portion of the same emulsion as that used in Example III was coated and exposed in the sameway as ExampleIII and was developed for from 1 to 5 minutes at 70 F. in' a solution'of the following composition:
- Example V A portion of the same emulsion as that used in Example III was coated; and exposed in'the same way as Example III and was. developed for from 1 to 5 minutes at 70 F, in a solution of the following composition:
- the 'yield'oi gray product was about 70 parts (55 per cent).
- 4-bromo-1-naphthyl hydrazine-'l-sulfonic acid wasfprepared in the same way as l-naphthyl hydrazinefi sulfonic acid. using e-bromo-l-naphthyl amine-hsulfonic'acid in place of lsnaphthylamine-G-sulfonic acid.
- . .-V4-bromo-1-naphthylarnine-7-sulfonic acid was a prepared as follows A. 1-acetylaminonaphthalene-sulfonic we A mixture of 600 parts of technical l-naphthyle amine-'lsulfo'nic acid (sodium salt); 2500 Y parts of glacial acetic acid, 500 parts of acetic anhydride and 54 parts of sodium acetate was heated underre flux for 6 hours, cooled, and filtered.
- the filtrate was acidified with 300 parts by volurheof concentrated hydrochloric acid, and the product filtered, washed with acetic acid, and dried, The yield consistedof 354 parts of mate.- rial containing about 20% sodium chloride" 1 B.
- said emulsion layer the presence of at least one naphthyl hydrazine sulfonic acid
- The'method of obtaining a direct positive image in a silver halide emulsion layer which comprises exposing to light rays to which the emulsion is sensitive, a silver halide emulsion layer a test portion of which upon exposure to alight intensity scale for a fixed time between 5 and I second and development for 3 minutes at 20CK'in the folloy'ving' internal type developer v p Grams Hydroquinone 15 Monomethyl-p-aminophenol sulfate Q. '15 Anhydrousjsod-ium sulfite 50 Potassium bromide 10-v Sodium hydroxide Sodium thiosulfate 20 Water to 1 liter.
- the method .of obtaining a direct positive image "in a'silver' halide emulsion layer, which comprises exposing to light rays to whichthe emulsion is sensitive, a silver halide emulsion layer a test portion of which upon exposure to a.
- v The method of obtaining a direct positive image in a silver halide emulsion layer, which comprises exposing to light rays to which the emulsion is sensitive, a. silver halide emulsion layer a test portion of which upon exposure to a light intensity scale for a fixed time between $5 and 1 second and development for 3 minutes "at 20 C. in the following internal type developer Grams Hydroquinone 15 Monomethyl-p-aminophenol sulfate 15 Anhydrous sodium sulfite -1 50 Potassium bromide 10 Sodium hydroxide 25 Sodium thiosulfate 20 Water to 1 liter.
- the method of obtaining a direct positive image in a silver halide emulsion layer which comprises exposing to light rays to which the emulsion is sensitive, a silver halide emulsion layer a test portion of which upon exposure to a light intensity scale for a fixed time between A and 1 second and development for 3 minutes at 20 C. in the following internal type developer (II) Grams Hydroquinone Monomethyl-p-aminophenol sulfate 15 Anhydrous sodium sulfite 50 Potassium bromide 10 Sodium hydroxide 25 Sodium thiosulfate Water to 1 liter.
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
- Silver Salt Photography Or Processing Solution Therefor (AREA)
Priority Applications (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| BE510220D BE510220A (en(2012)) | 1951-03-28 | ||
| US218072A US2604400A (en) | 1951-03-28 | 1951-03-28 | Naphthyl hydrazine sulfonic acids in direct positive photographic processes |
| DEE5231A DE925691C (de) | 1951-03-28 | 1952-03-21 | Verfahren zur Erzeugung eines direkt-positiven Bildes in einer Halogensilber-Emusilonsschicht |
| GB8003/52A GB712355A (en) | 1951-03-28 | 1952-03-28 | Improvements in photographic processes |
| FR65219D FR65219E (fr) | 1951-03-28 | 1952-03-28 | Procédé photographique d'inversion et nouveaux produits pour sa mise en oeuvre |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US218072A US2604400A (en) | 1951-03-28 | 1951-03-28 | Naphthyl hydrazine sulfonic acids in direct positive photographic processes |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| US2604400A true US2604400A (en) | 1952-07-22 |
Family
ID=22813626
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US218072A Expired - Lifetime US2604400A (en) | 1951-03-28 | 1951-03-28 | Naphthyl hydrazine sulfonic acids in direct positive photographic processes |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US2604400A (en(2012)) |
| BE (1) | BE510220A (en(2012)) |
| DE (1) | DE925691C (en(2012)) |
| FR (1) | FR65219E (en(2012)) |
| GB (1) | GB712355A (en(2012)) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2675318A (en) * | 1951-06-27 | 1954-04-13 | Eastman Kodak Co | Hydroquinone monosulfonate in direct positive photographic developers |
| US3186840A (en) * | 1958-12-11 | 1965-06-01 | Agfa Ag | Direct positive colored photographic elements containing dihydrazones and process for forming colored masks therefrom |
-
0
- BE BE510220D patent/BE510220A/xx unknown
-
1951
- 1951-03-28 US US218072A patent/US2604400A/en not_active Expired - Lifetime
-
1952
- 1952-03-21 DE DEE5231A patent/DE925691C/de not_active Expired
- 1952-03-28 FR FR65219D patent/FR65219E/fr not_active Expired
- 1952-03-28 GB GB8003/52A patent/GB712355A/en not_active Expired
Non-Patent Citations (1)
| Title |
|---|
| None * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2675318A (en) * | 1951-06-27 | 1954-04-13 | Eastman Kodak Co | Hydroquinone monosulfonate in direct positive photographic developers |
| US3186840A (en) * | 1958-12-11 | 1965-06-01 | Agfa Ag | Direct positive colored photographic elements containing dihydrazones and process for forming colored masks therefrom |
Also Published As
| Publication number | Publication date |
|---|---|
| FR65219E (fr) | 1956-02-07 |
| DE925691C (de) | 1955-03-28 |
| BE510220A (en(2012)) | |
| GB712355A (en) | 1954-07-21 |
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