EP0992845A1 - Light-sensitive silver halide material providing improved surface characteristics after processing - Google Patents
Light-sensitive silver halide material providing improved surface characteristics after processing Download PDFInfo
- Publication number
- EP0992845A1 EP0992845A1 EP99203063A EP99203063A EP0992845A1 EP 0992845 A1 EP0992845 A1 EP 0992845A1 EP 99203063 A EP99203063 A EP 99203063A EP 99203063 A EP99203063 A EP 99203063A EP 0992845 A1 EP0992845 A1 EP 0992845A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- latex
- gelatin
- afterlayer
- layer
- silver halide
- 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.)
- Withdrawn
Links
- 239000000463 material Substances 0.000 title claims abstract description 84
- -1 silver halide Chemical class 0.000 title claims abstract description 69
- 229910052709 silver Inorganic materials 0.000 title claims abstract description 44
- 239000004332 silver Substances 0.000 title claims abstract description 44
- 238000012545 processing Methods 0.000 title description 55
- 229920000126 latex Polymers 0.000 claims abstract description 96
- 239000004816 latex Substances 0.000 claims abstract description 95
- 108010010803 Gelatin Proteins 0.000 claims abstract description 75
- 229920000159 gelatin Polymers 0.000 claims abstract description 75
- 239000008273 gelatin Substances 0.000 claims abstract description 75
- 235000019322 gelatine Nutrition 0.000 claims abstract description 75
- 235000011852 gelatine desserts Nutrition 0.000 claims abstract description 75
- 229920000642 polymer Polymers 0.000 claims abstract description 44
- 230000002180 anti-stress Effects 0.000 claims abstract description 37
- 229920001577 copolymer Polymers 0.000 claims abstract description 37
- 239000000839 emulsion Substances 0.000 claims abstract description 37
- 230000001681 protective effect Effects 0.000 claims abstract description 29
- 229920002635 polyurethane Polymers 0.000 claims abstract description 15
- 239000004814 polyurethane Substances 0.000 claims abstract description 15
- 229920001490 poly(butyl methacrylate) polymer Polymers 0.000 claims abstract description 10
- 229920002401 polyacrylamide Polymers 0.000 claims abstract description 7
- 229920001485 poly(butyl acrylate) polymer Polymers 0.000 claims abstract description 5
- SOGAXMICEFXMKE-UHFFFAOYSA-N Butylmethacrylate Chemical compound CCCCOC(=O)C(C)=C SOGAXMICEFXMKE-UHFFFAOYSA-N 0.000 claims description 8
- 239000010410 layer Substances 0.000 description 67
- 239000000243 solution Substances 0.000 description 59
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 41
- 239000003795 chemical substances by application Substances 0.000 description 26
- 238000000576 coating method Methods 0.000 description 24
- 239000011248 coating agent Substances 0.000 description 22
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- 230000035945 sensitivity Effects 0.000 description 15
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- 238000001035 drying Methods 0.000 description 14
- IOLCXVTUBQKXJR-UHFFFAOYSA-M potassium bromide Chemical compound [K+].[Br-] IOLCXVTUBQKXJR-UHFFFAOYSA-M 0.000 description 14
- 150000001875 compounds Chemical class 0.000 description 13
- 238000000034 method Methods 0.000 description 13
- 239000013078 crystal Substances 0.000 description 12
- 239000002245 particle Substances 0.000 description 12
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 10
- 230000004313 glare Effects 0.000 description 10
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 9
- 229910052782 aluminium Inorganic materials 0.000 description 9
- 230000001965 increasing effect Effects 0.000 description 9
- NLKNQRATVPKPDG-UHFFFAOYSA-M potassium iodide Chemical compound [K+].[I-] NLKNQRATVPKPDG-UHFFFAOYSA-M 0.000 description 9
- SQGYOTSLMSWVJD-UHFFFAOYSA-N silver(1+) nitrate Chemical compound [Ag+].[O-]N(=O)=O SQGYOTSLMSWVJD-UHFFFAOYSA-N 0.000 description 9
- 239000011230 binding agent Substances 0.000 description 8
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- 238000001556 precipitation Methods 0.000 description 7
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- QIGBRXMKCJKVMJ-UHFFFAOYSA-N Hydroquinone Chemical compound OC1=CC=C(O)C=C1 QIGBRXMKCJKVMJ-UHFFFAOYSA-N 0.000 description 6
- 239000002202 Polyethylene glycol Substances 0.000 description 6
- KWYUFKZDYYNOTN-UHFFFAOYSA-M Potassium hydroxide Chemical compound [OH-].[K+] KWYUFKZDYYNOTN-UHFFFAOYSA-M 0.000 description 6
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical class [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 6
- 239000002253 acid Substances 0.000 description 6
- 239000000084 colloidal system Substances 0.000 description 6
- 238000006386 neutralization reaction Methods 0.000 description 6
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- SMZOUWXMTYCWNB-UHFFFAOYSA-N 2-(2-methoxy-5-methylphenyl)ethanamine Chemical compound COC1=CC=C(C)C=C1CCN SMZOUWXMTYCWNB-UHFFFAOYSA-N 0.000 description 3
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 description 3
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- 206010070834 Sensitisation Diseases 0.000 description 3
- 229910021607 Silver chloride Inorganic materials 0.000 description 3
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical class OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 3
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 3
- 125000001931 aliphatic group Chemical group 0.000 description 3
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- BUACSMWVFUNQET-UHFFFAOYSA-H dialuminum;trisulfate;hydrate Chemical compound O.[Al+3].[Al+3].[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O BUACSMWVFUNQET-UHFFFAOYSA-H 0.000 description 3
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- ZUNKMNLKJXRCDM-UHFFFAOYSA-N silver bromoiodide Chemical compound [Ag].IBr ZUNKMNLKJXRCDM-UHFFFAOYSA-N 0.000 description 3
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- HRPVXLWXLXDGHG-UHFFFAOYSA-N Acrylamide Chemical compound NC(=O)C=C HRPVXLWXLXDGHG-UHFFFAOYSA-N 0.000 description 2
- DMJOODKYJPSWRD-UHFFFAOYSA-N CC(C)C([Na])S(O)(=O)=O Chemical class CC(C)C([Na])S(O)(=O)=O DMJOODKYJPSWRD-UHFFFAOYSA-N 0.000 description 2
- WSFSSNUMVMOOMR-UHFFFAOYSA-N Formaldehyde Chemical compound O=C WSFSSNUMVMOOMR-UHFFFAOYSA-N 0.000 description 2
- CERQOIWHTDAKMF-UHFFFAOYSA-N Methacrylic acid Chemical compound CC(=C)C(O)=O CERQOIWHTDAKMF-UHFFFAOYSA-N 0.000 description 2
- 229920003171 Poly (ethylene oxide) Polymers 0.000 description 2
- 239000004372 Polyvinyl alcohol Substances 0.000 description 2
- 229920002472 Starch Polymers 0.000 description 2
- RAHZWNYVWXNFOC-UHFFFAOYSA-N Sulphur dioxide Chemical compound O=S=O RAHZWNYVWXNFOC-UHFFFAOYSA-N 0.000 description 2
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- LEQAOMBKQFMDFZ-UHFFFAOYSA-N alpha-ketodiacetal Natural products O=CC=O LEQAOMBKQFMDFZ-UHFFFAOYSA-N 0.000 description 2
- XYXNTHIYBIDHGM-UHFFFAOYSA-N ammonium thiosulfate Chemical compound [NH4+].[NH4+].[O-]S([O-])(=O)=S XYXNTHIYBIDHGM-UHFFFAOYSA-N 0.000 description 2
- 150000001720 carbohydrates Chemical class 0.000 description 2
- 125000003178 carboxy group Chemical group [H]OC(*)=O 0.000 description 2
- 229920006037 cross link polymer Polymers 0.000 description 2
- 125000004185 ester group Chemical group 0.000 description 2
- 150000004676 glycans Chemical class 0.000 description 2
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 2
- 239000010931 gold Substances 0.000 description 2
- 229910052737 gold Inorganic materials 0.000 description 2
- XMBWDFGMSWQBCA-UHFFFAOYSA-N hydrogen iodide Chemical compound I XMBWDFGMSWQBCA-UHFFFAOYSA-N 0.000 description 2
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- BWHMMNNQKKPAPP-UHFFFAOYSA-L potassium carbonate Chemical compound [K+].[K+].[O-]C([O-])=O BWHMMNNQKKPAPP-UHFFFAOYSA-L 0.000 description 2
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- WYYQVWLEPYFFLP-UHFFFAOYSA-K chromium(3+);triacetate Chemical compound [Cr+3].CC([O-])=O.CC([O-])=O.CC([O-])=O WYYQVWLEPYFFLP-UHFFFAOYSA-K 0.000 description 1
- 239000007859 condensation product Substances 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 238000007766 curtain coating Methods 0.000 description 1
- QSAWQNUELGIYBC-UHFFFAOYSA-N cyclohexane-1,2-dicarboxylic acid Chemical compound OC(=O)C1CCCCC1C(O)=O QSAWQNUELGIYBC-UHFFFAOYSA-N 0.000 description 1
- 150000004691 decahydrates Chemical class 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 235000014113 dietary fatty acids Nutrition 0.000 description 1
- 150000005205 dihydroxybenzenes Chemical class 0.000 description 1
- UQGFMSUEHSUPRD-UHFFFAOYSA-N disodium;3,7-dioxido-2,4,6,8,9-pentaoxa-1,3,5,7-tetraborabicyclo[3.3.1]nonane Chemical compound [Na+].[Na+].O1B([O-])OB2OB([O-])OB1O2 UQGFMSUEHSUPRD-UHFFFAOYSA-N 0.000 description 1
- AFOSIXZFDONLBT-UHFFFAOYSA-N divinyl sulfone Chemical compound C=CS(=O)(=O)C=C AFOSIXZFDONLBT-UHFFFAOYSA-N 0.000 description 1
- 238000007606 doctor blade method Methods 0.000 description 1
- 239000012992 electron transfer agent Substances 0.000 description 1
- 238000004945 emulsification Methods 0.000 description 1
- 239000003995 emulsifying agent Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 235000010350 erythorbic acid Nutrition 0.000 description 1
- ZOOODBUHSVUZEM-UHFFFAOYSA-N ethoxymethanedithioic acid Chemical compound CCOC(S)=S ZOOODBUHSVUZEM-UHFFFAOYSA-N 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 230000001747 exhibiting effect Effects 0.000 description 1
- 239000000194 fatty acid Substances 0.000 description 1
- 229930195729 fatty acid Natural products 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 229920002313 fluoropolymer Polymers 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- 150000002334 glycols Chemical class 0.000 description 1
- 229940015043 glyoxal Drugs 0.000 description 1
- 150000004820 halides Chemical class 0.000 description 1
- 150000002366 halogen compounds Chemical class 0.000 description 1
- 125000000623 heterocyclic group Chemical group 0.000 description 1
- 230000002209 hydrophobic effect Effects 0.000 description 1
- 229920013821 hydroxy alkyl cellulose Polymers 0.000 description 1
- 125000004356 hydroxy functional group Chemical group O* 0.000 description 1
- 239000001866 hydroxypropyl methyl cellulose Substances 0.000 description 1
- 229920003088 hydroxypropyl methyl cellulose Polymers 0.000 description 1
- 235000010979 hydroxypropyl methyl cellulose Nutrition 0.000 description 1
- UFVKGYZPFZQRLF-UHFFFAOYSA-N hydroxypropyl methyl cellulose Chemical compound OC1C(O)C(OC)OC(CO)C1OC1C(O)C(O)C(OC2C(C(O)C(OC3C(C(O)C(O)C(CO)O3)O)C(CO)O2)O)C(CO)O1 UFVKGYZPFZQRLF-UHFFFAOYSA-N 0.000 description 1
- 238000010348 incorporation Methods 0.000 description 1
- 238000007603 infrared drying Methods 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- 230000000977 initiatory effect Effects 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- 229940026239 isoascorbic acid Drugs 0.000 description 1
- 239000004571 lime Substances 0.000 description 1
- 238000011068 loading method Methods 0.000 description 1
- 239000000314 lubricant Substances 0.000 description 1
- 230000005499 meniscus Effects 0.000 description 1
- CERQOIWHTDAKMF-UHFFFAOYSA-M methacrylate group Chemical group C(C(=C)C)(=O)[O-] CERQOIWHTDAKMF-UHFFFAOYSA-M 0.000 description 1
- 125000005397 methacrylic acid ester group Chemical group 0.000 description 1
- WSFSSNUMVMOOMR-NJFSPNSNSA-N methanone Chemical compound O=[14CH2] WSFSSNUMVMOOMR-NJFSPNSNSA-N 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000012170 montan wax Substances 0.000 description 1
- ZAKLKBFCSHJIRI-UHFFFAOYSA-N mucochloric acid Natural products OC1OC(=O)C(Cl)=C1Cl ZAKLKBFCSHJIRI-UHFFFAOYSA-N 0.000 description 1
- 229930014626 natural product Natural products 0.000 description 1
- 238000009659 non-destructive testing Methods 0.000 description 1
- 239000003960 organic solvent Substances 0.000 description 1
- 150000002924 oxiranes Chemical class 0.000 description 1
- QUBQYFYWUJJAAK-UHFFFAOYSA-N oxymethurea Chemical compound OCNC(=O)NCO QUBQYFYWUJJAAK-UHFFFAOYSA-N 0.000 description 1
- 229950005308 oxymethurea Drugs 0.000 description 1
- CMCWWLVWPDLCRM-UHFFFAOYSA-N phenidone Chemical compound N1C(=O)CCN1C1=CC=CC=C1 CMCWWLVWPDLCRM-UHFFFAOYSA-N 0.000 description 1
- 235000021317 phosphate Nutrition 0.000 description 1
- XYFCBTPGUUZFHI-UHFFFAOYSA-O phosphonium Chemical compound [PH4+] XYFCBTPGUUZFHI-UHFFFAOYSA-O 0.000 description 1
- 150000003013 phosphoric acid derivatives Chemical class 0.000 description 1
- 125000000612 phthaloyl group Chemical group C(C=1C(C(=O)*)=CC=CC1)(=O)* 0.000 description 1
- 239000004014 plasticizer Substances 0.000 description 1
- 229920000191 poly(N-vinyl pyrrolidone) Polymers 0.000 description 1
- 229920002006 poly(N-vinylimidazole) polymer Polymers 0.000 description 1
- 229920001483 poly(ethyl methacrylate) polymer Polymers 0.000 description 1
- 229920003207 poly(ethylene-2,6-naphthalate) Polymers 0.000 description 1
- 239000004584 polyacrylic acid Substances 0.000 description 1
- 229920001515 polyalkylene glycol Polymers 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 239000011112 polyethylene naphthalate Substances 0.000 description 1
- 229920001451 polypropylene glycol Polymers 0.000 description 1
- 229920001296 polysiloxane Polymers 0.000 description 1
- 229920002223 polystyrene Polymers 0.000 description 1
- 229920003009 polyurethane dispersion Polymers 0.000 description 1
- 229910000027 potassium carbonate Inorganic materials 0.000 description 1
- BHZRJJOHZFYXTO-UHFFFAOYSA-L potassium sulfite Chemical compound [K+].[K+].[O-]S([O-])=O BHZRJJOHZFYXTO-UHFFFAOYSA-L 0.000 description 1
- 235000019252 potassium sulphite Nutrition 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 235000018102 proteins Nutrition 0.000 description 1
- 108090000623 proteins and genes Proteins 0.000 description 1
- 102000004169 proteins and genes Human genes 0.000 description 1
- UGZVCHWAXABBHR-UHFFFAOYSA-O pyridin-1-ium-1-carboxamide Chemical class NC(=O)[N+]1=CC=CC=C1 UGZVCHWAXABBHR-UHFFFAOYSA-O 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 238000002601 radiography Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
- 238000007127 saponification reaction Methods 0.000 description 1
- 229930182490 saponin Natural products 0.000 description 1
- 150000007949 saponins Chemical class 0.000 description 1
- 235000017709 saponins Nutrition 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 229940045105 silver iodide Drugs 0.000 description 1
- 239000010802 sludge Substances 0.000 description 1
- 229910021647 smectite Inorganic materials 0.000 description 1
- 235000017281 sodium acetate Nutrition 0.000 description 1
- 229940087562 sodium acetate trihydrate Drugs 0.000 description 1
- 159000000000 sodium salts Chemical class 0.000 description 1
- 235000010265 sodium sulphite Nutrition 0.000 description 1
- 239000004328 sodium tetraborate Substances 0.000 description 1
- 235000010339 sodium tetraborate Nutrition 0.000 description 1
- AKHNMLFCWUSKQB-UHFFFAOYSA-L sodium thiosulfate Chemical compound [Na+].[Na+].[O-]S([O-])(=O)=S AKHNMLFCWUSKQB-UHFFFAOYSA-L 0.000 description 1
- 235000019345 sodium thiosulphate Nutrition 0.000 description 1
- HLWRUJAIJJEZDL-UHFFFAOYSA-M sodium;2-[2-[bis(carboxymethyl)amino]ethyl-(carboxymethyl)amino]acetate Chemical compound [Na+].OC(=O)CN(CC(O)=O)CCN(CC(O)=O)CC([O-])=O HLWRUJAIJJEZDL-UHFFFAOYSA-M 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
- 239000007858 starting material Substances 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 229920003048 styrene butadiene rubber Polymers 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 150000005846 sugar alcohols Polymers 0.000 description 1
- 150000003467 sulfuric acid derivatives Chemical class 0.000 description 1
- 239000004291 sulphur dioxide Substances 0.000 description 1
- 235000010269 sulphur dioxide Nutrition 0.000 description 1
- 238000003786 synthesis reaction Methods 0.000 description 1
- 230000008719 thickening Effects 0.000 description 1
- 150000004684 trihydrates Chemical class 0.000 description 1
- JOYRKODLDBILNP-UHFFFAOYSA-N urethane group Chemical group NC(=O)OCC JOYRKODLDBILNP-UHFFFAOYSA-N 0.000 description 1
- 125000000391 vinyl group Chemical group [H]C([*])=C([H])[H] 0.000 description 1
- 229920002554 vinyl polymer Polymers 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
- 239000001993 wax Substances 0.000 description 1
- 239000000080 wetting agent Substances 0.000 description 1
- 239000012991 xanthate Substances 0.000 description 1
- 239000005019 zein Substances 0.000 description 1
- 229940093612 zein Drugs 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
- G03C1/76—Photosensitive materials characterised by the base or auxiliary layers
- G03C1/95—Photosensitive materials characterised by the base or auxiliary layers rendered opaque or writable, e.g. with inert particulate additives
-
- 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
- G03C5/00—Photographic processes or agents therefor; Regeneration of such processing agents
- G03C5/16—X-ray, infrared, or ultraviolet ray processes
Definitions
- the invention is related to a light-sensitive silver halide photographic material having satisfactory developability, reduced pressure sensitivity and excellent surface characteristics after processing in both hardener containing and hardener free processing.
- EP-A 0 806 705 wherein a method has been disclosed of processing an image-wise exposed light-sensitive silver halide material by the steps of developing, fixing in a fixer solution containing less than 4 g per litre of aluminum ions expressed as an equivalent amount of aluminum sulphate, rinsing and drying; characterized in that said material comprises a support and on one or both sides thereof at least one light-sensitive silver halide emulsion layer and a gelatinous protective antistress layer, wherein said antistress layer comprises at least one polymer latex in such an amount that there is a ratio by weight of latex to gelatin is from 0.5 to 1.5 and wherein said material is hardened to such an extent that its swelling degree after immersing said material for 3 minutes in demineral
- a light-sensitive silver halide photographic material comprising a support and on one or both sides thereof at least one light-sensitive silver halide emulsion layer, a gelatinous protective antistress layer and, adjacent thereto as an outermost layer, a gelatinous afterlayer characterized in that said afterlayer comprises at least one polymer latex, being a polybutylacrylate, a polybutylmethacrylate latex or a polyurethane latex, or a copolymer latex being a copolymer poly(butyl methacrylate) polyacrylamide N-substituted sulfo-isobutyl salt, in a ratio amount by weight of (co)polymer latex to gelatin from 0.2:1 up to 5:1 and a total amount of (co)polymer latex and gelatin of at least 0.10 g/m 2 .
- Preferred (co)polymer latices used in the protective antistress layer and/or outermost afterlayer of the light-sensitive silver halide material according to the present invention are cross-linked polymers and can be prepared as described e.g. in US-A 4,301,240 by emulsion polymerisation of aliphatic esters of acrylic and/or methacrylic acid in water in the presence of polyfunctional crosslinking monomers and an emulsifier, followed by saponification of the obtained copolymer.
- emulsion polymerisation copolymers with a molecular weight well above 500,000 are obtained and the average particle size of the latex is smaller than 150 nm.
- Another example of the synthesis of ionic cross-linked copolymers can further be found e.g. in EP-A 0 452 568 and the corresponding US-A 5,472,832.
- a particularly preferred latex of an ionic copolymer for use in the gelatinous protective antistress layer of a light-sensitive silver halide material is a copolymer of butyl methacrylate and acrylamide-N-isobutylsulphonic acid sodium salt as represented in the formula (I).
- a ratio amount of butylmethacrylate and and acrylamide-N-isobutyl-sulphonic acid sodium salt is at least 80:20 and more preferably about 95:5.
- Latex compounds are polybutylacrylate and polybutylmethacrylate as examples of non-ionic polymer latex compounds. It is not excluded to use them in combination, e.g. in a mixture with each other or even with other polymers dispersed as a latex as there are polymethylmethacrylate, polymethylacrylate, polyethylacrylate latex compounds and the like. Average particle sizes of the latex particles are in the range from about 50 nm up to about 115 nm as for the latex copolymer according to the formula (I) given hereinbefore.
- Another particularly preferred latex is a polyurethane latex, which is preferably in the form of a dispersion of an aliphatic anionic polyurethane.
- IMPRANIL 43056 trademarked product from BAYER AG, Leverkusen, Federal Republic of Germany is very suitable.
- This IMPRANIL-latex is a 40 % aqueous dispersion of polyurethane prepared from DESMODUR W (trademarked product from BAYER AG), which is a dicyclohexylmethane diisocyanate, and a polyester having a low molecular weight of about 800.
- the average particle size of the latex may vary between 0.02 and 0.2 ⁇ m.
- the polyurethane is added to the coating solution as an aqueous latex dispersion.
- An especially useful polyurethane is the one having a highchual amount of urethane groups, in order to get a high degree of cross-linking and as a consequence low tendency to sticking.
- a lubricant in an outermost afterlayer on top of the protective antistress layer comprising said polyurethane dispersion may be favourable.
- Said polyurethane latex can moreover be loaded with e.g. a developing agent by addition of the aqueous loadable polyurethane latex to a solution of useful agent(s) as e.g. a developing agent in a water-miscible organic solvent e.g.
- a mixture of developing agents including a dihydroxybenzene like hydroquinone and a 3-pyrazolidine-1-one developing agent as e.g. 1-phenyl-3-pyrazolidine-1-one also known as "phenidone", being an electron transfer agent or super additive developer, can be used in combination, in that case preferably in a respective molar ratio of from 2/1 to 10/1.
- dihydroxybenzene or dihydroxybenzenes is(are) preferably present in an amount of from 0.05 to 0.5 g for a coverage of silver halide equivalent with 1 g of silver nitrate.
- Ascorbic acid iso-ascorbic acid whether or not in combination with the preferred developing agent(s) can also be used.
- activation material can be obtained which can be developed by means of an alkaline solution.
- the material according to the present invention when comprising a polyurethane as polymer latex, said latex is an aliphatic anionic polyurethane.
- one or more latex (co)polymer(s) is(are) optionally present in the gelatinous protective antistress layer as the objects of the present invention are also fulfilled when said protective antistress layer is free from any polymer latex. It is however required for the latex (co)polymer(s) to be at least present in the outermost gelatinous afterlayer of the material according to the present invention: at least one (co)polymer latex in a ratio amount by weight of (co)polymer latex to gelatin from 0.2:1 up to 5:1, and more preferably in a ratio of from 0.3:1 up to 3:1, and a total amount of (co)polymer latex and gelatin of at least 0.10 g/m 2 is required.
- said material has a total amount of (co)polymer latex and gelatin of up to 1.2 g/m 2 in said outermost gelatinous afterlayer, which is in favour of better spreading of water in the rinsing step (and even drying properties or absence of "water spot defects") and in favour of pressure sensitivity.
- a total amount of (co)polymer latex and gelatin of up to 1.2 g/m 2 in said outermost gelatinous afterlayer, which is in favour of better spreading of water in the rinsing step (and even drying properties or absence of "water spot defects") and in favour of pressure sensitivity.
- Preferred amounts of gelatin in said outermost afterlayer are in the range from 0.10-0.40 g/m 2
- preferred amounts of latex (co)polymer(s) are in the range from 0.05-0.60 g/m 2 and more preferably in the range from 0.10-0.40 g/m 2 .
- the material according to the present invention is coated with an amount of gelatin as a binder material (known as gelatin coverage) in the protective antistress coating of not more than than 1.5 g per m 2 and more preferably in the range of from 0.20 to 1.0 g per m 2 and in the outermost afterlayer the gelatin coverage is in the range of from 0.05 to 0.50 g per m 2 , more preferably from 0.10 to 0.40 g per m 2 and still more preferably from 0.20 to 0.40 g per m 2 .
- gelatin coverage an amount of gelatin as a binder material in the protective antistress coating of not more than than 1.5 g per m 2 and more preferably in the range of from 0.20 to 1.0 g per m 2 and in the outermost afterlayer the gelatin coverage is in the range of from 0.05 to 0.50 g per m 2 , more preferably from 0.10 to 0.40 g per m 2 and still more preferably from 0.20 to 0.40 g per m 2 .
- the material according to the present invention is also intended to be processable in a developer and a fixer without hardeners (like the environmental unfriendly glutaraldehyd)
- the material of the present invention is hardened to such an extent that its swelling degree after immersing said material for 3 minutes in demineralized water of 25 °C is not more than 300 %, and even more preferably less than 200 %.
- said swelling degree should not be higher.
- the said latex-type (co)polymers may further optionally be present in one or more emulsion layer(s) coated between the protective antistress layer and a subbed support, the subbing layer of which may be overcoated with at least one gelatinous intermediate layer.
- Layers and layer arrangements which can be applied to the film material, apart from the requirement to have an afterlayer, coated adjacent and as an outermost layer of the material of the present invention are those described in US-A's 4,092,168; 4,311,787 and 5,693,370 and in EP-A 's 0 712 034; 0 712 036; 0 677 773; 0 678 772; 0 610 608; 0 610 609 and 0 569 075, in DE- A 2,453,217 and in GB-A 7,907,440.
- hydrophilic colloid binders differing from gelatin that can be homogeneously mixed therewith may be present and are e.g. other proteinaceous colloids, polysaccharides as e.g. starch and polydextranes, as well as synthetic substitutes for gelatin as e.g.
- poly-N-vinylpyrrolidone polyvinyl alcohol, polyacrylamide, polyacrylic acid, polyamethyl-acrylate, polyethyl-acrylate, polymethyl-methacrylate, polyethyl-methacrylate, polyvinyl imidazole, polyvinyl pyrazole and derivatives thereof as well as styrene-male ⁇ c acid or a styrene-male ⁇ c acid anhydrid type copolymer.
- non-ionic surfactants such as saponins, alkylene oxides e.g.
- polyethylene glycol polyethylene glycol/polypropylene glycol condensation products, polyethylene glycol alkyl ethers or polyethylene glycol alkylaryl ethers, polyethylene glycol esters, polyethylene glycol sorbitan esters, polyalkylene glycol alkylamines or alkylamides, silicone polyethylene oxide adducts, glycidol derivatives, fatty acid esters of polyhydric alcohols and alkyl esters of saccharides; anionic agents comprising an acid group such as a carboxy-, sulpho-, phospho-, sulphuric or phosphoric ester group; ampholytic agents such as aminoacids, aminoalkyl sulphonic acids, aminoalkyl sulphates or phosphates, alkyl betaines, and amine-N-oxides; and cationic agents such as alkylamine salts, aliphatic, aromatic, or heterocyclic quaternary ammonium salts, aliphatic or heterocyclic
- Such surface-active agents can be used for various purposes e.g. as coating aids, as compounds preventing electric charges, as compounds improving slidability, as compounds facilitating dispersive emulsification, as compounds preventing or reducing adhesion, and as compounds improving the photographic characteristics e.g higher contrast, sensitization, and development acceleration.
- gelatin Conventional lime-treated or acid treated gelatin can be used. The preparation of such gelatin types has been described in e.g. "The Science and Technology of Gelatin", edited by A.G. Ward and A. Courts, Academic Press 1977, p. 295 and next pages.
- the gelatin can also be an enzyme-treated gelatin as described in Bull. Soc. Sci. Phot. Japan, N° 16, p.30 (1966).
- said gelatin can be replaced in part or integrally by synthetic polymers as cited hereinbefore or by natural or semi-synthetic polymers.
- Natural substitutes for gelatin are e.g. other proteins such as zein, albumin and casein, cellulose, saccharides, starch, and alginates.
- Semi-synthetic substitutes for gelatin are modified natural products as e.g. gelatin derivatives obtained by conversion of gelatin with alkylating or acylating agents or by grafting of polymerisable monomers on gelatin, and cellulose derivatives such as hydroxyalkyl cellulose, carboxymethyl cellulose, phthaloyl cellulose, and cellulose sulphates.
- gelatin in the antistress layer is partially replaced by colloidal silica as it gives rise to a further improvement of the obtained properties of the material according to the present invention.
- colloidal silica having an average particle size of not larger than 10 nm and having a surface area of at least 300 m 2 per gram is used.
- Especially preferred colloidal silica particles have a surface area of 500 m 2 per gram and an average grain size smaller than 7 nm.
- Such type of silica is sold under the name KIESELSOL 500 (KIESELSOL is a registered trade name of Bayer AG, Leverkusen, West-Germany).
- Colloidal silica is preferably present at a coverage of at least 50 mg per m 2 . Further the coverage of said colloidal silica in the anti-stress layer is preferably in the range of 50 mg to 500 mg per m 2 .
- the antistress layer may further contain friction-lowering substance(s) such as dispersed wax particles (carnaubawax or montanwax) or polyethylene particles, fluorinated polymer particles, silicon polymer particles etc., in order to further reduce the sticking tendency of the layer especially in an atmosphere of high relative humidity.
- friction-lowering substance(s) such as dispersed wax particles (carnaubawax or montanwax) or polyethylene particles, fluorinated polymer particles, silicon polymer particles etc.
- the gelatin binder can be forehardened with appropriate hardening agents such as those of the epoxide type, those of the ethylene-mine type, those of the vinylsulfone type as e.g. 1,3-vinylsulphonyl-2-propanol, bis-vinyl-sulphonyl methyl or bis-vinyl sulphonyl ethyl ether, hydroxy substituted vinyl sulphonyl hardeners, chromium salts as e.g. chromium acetate and chromium alum, aldehydes as e.g. formaldehyde, glyoxal, and glutaraldehyde, N-methylol compounds as e.g.
- dimethylolurea and methyloldimethylhydantoin dioxan derivatives as e.g. 2,3-dihydroxy-dioxan, active vinyl compounds as e.g. 1,3, 5-triacryloyl-hexahydro-s-triazine, active halogen compounds as e.g. 2,4-dichloro-6-hydroxy-s-triazine, and mucohalogenic acids as e.g. mucochloric acid and mucophenoxychloric acid.
- These hardeners can be used alone or in combination.
- the binder can also be hardened with fast-reacting hardeners such as carbamoylpyridinium salts as disclosed in US-A 4,063,952 and with the onium compounds disclosed in EP-A 0 408 143.
- non-ionic surfactant(s) having antistatic characteristics such as e.g. polyoxyethylene compounds.
- the said surfactant(s) is(are) present in an optionally present outermost layer.
- Said layer may be a gelatin free afterlayer or a thin gelatinous layer.
- a latex (co)polymer having antistatic properties is added to the protective antistress layer containing the latex (co)polymer(s) set forth hereinbefore. Said latex (co)polymer is present in an amount of up to 0.5 g/m 2 per side.
- a preferred one is the latex of a cross-linked polymer, being a copolymer of an acrylic and/or methacrylic acid ester including 90-99 mole % of acrylate and/or methacrylate units and 1 to 10 mole % of tetraallyloxyethane units as polyfunctional crosslinking monomer, wherein in said copolymer at least 75 % of the ester groups have been transformed into alkali metal carboxylate groups, thus exhibiting ionic characteristics: especially preferred as a cross-linked ionic polymer is poly( [c.l.] tetraallyloxyethane-co-methyl acrylate/acrylic acid), the formula (II) of which is given hereinafter with a preferable 3/18/79 molar ratio.
- the afterlayer may further comprise spacing agents and coating aids such as wetting agents as e.g. perfluorinated surfactants.
- Spacing agents which may also be present in the protective antistress layer in generally have an average particle size which is comprised between 0.2 and 10 ⁇ m. Spacing agents can be soluble or insoluble in alkali. Alkali-insoluble spacing agents usually remain permanently in the photographic element, whereas alkali-soluble spacing agents usually are removed therefrom in an alkaline processing bath.
- Suitable spacing agents can be made i.a. of polymethyl methacrylate, of copolymers of acrylic acid and methyl methacrylate, and of hydroxypropylmethyl cellulose hexahydrophthalate. Other suitable spacing agents have been described in US-A 4,614,708.
- the coating of the layers of the material of the present invention may proceed by any coating technique known in the art, as e.g. by doctor blade coating, air knife coating, curtain coating, slide hopper coating or meniscus coating, which are coating techniques known from the production of photographic silver emulsion layer materials.
- Preferred thickening agents include aqueous polymers such as polystyrene sulphonic acid, sulphuric acid esters, polysaccharides, polymers having a sulphonic acid group, a carboxylic acid group or a phosphoric acid group, polyacrylamide, polymethacrylic acid or its salt, copolymers from acrylamide and methacrylic acid and salts derived thereof, copolymers from 2-acrylamido-2-methyl-propane sulphonic acid, polyvinyl alcohol, alginate, xanthane, carraghenan, synthetic (smectite) clays and the like.
- aqueous polymers such as polystyrene sulphonic acid, sulphuric acid esters, polysaccharides, polymers having a sulphonic acid group, a carboxylic acid group or a phosphoric acid group, polyacrylamide, polymethacrylic acid or its salt, copolymers from acrylamide and meth
- Polymeric thickeners well-known from the literature resulting in thickening of the coating solution may be used independently or in combination.
- Patents concerning thickening agents are e.g. US-A 3,167,410, Belgian Patent No. 558,143, JP-A's 53/18687 and 58/36768 and DE-A 3 836 945.
- the silver halide photographic material may contain in the light-sensitive emulsion layer(s) and/or in one or more layers in water-permeable relationship with said silver halide emulsion layer(s) any of the kinds of compounds customarily used in such layers for improving the photographic process, manufacture or preservability (storage).
- such layers may incorporate one or more coating aids, stabilising agents or antifogging agents as described e.g. in GB-A 1,007,020 filed March 6, 1963 by Agfa A.G., plasticizers, development-modifying agents e.g.
- thioethers acting as silver chelating agents with at least two sulphur atoms as donors are used.
- a survey of thioether compounds suitable for incorporation in silver halide emulsion layers of widely varying silver halide composition has been given in the EP-A 0 026 520. Useful compounds have further been described in EP-A's 0 634 688 and 0 674 215.
- Silver halide emulsion crystals used in the silver halide emulsion layer(s) of the material of the present invention are composed of silver chloride, silver chlorobromide, silver chloroiodide, silver chlorobromoiodide, silver bromide or silver bromoiodide. Regular as well as tabular crystals may be present, as well as mixtures thereof. Crystals having a different crystal habit may be coated in different layers as e.g. in EP-A 0 770 909.
- silver halide crystals having a regular crystal habit preferably have an average grain size of at least 0.15 ⁇ m, up to at most 1.2 ⁇ m, more preferably up to 1.0 ⁇ m and still more preferably up to 0.8 ⁇ m.
- Silver halide crystals having tabular ⁇ 111 ⁇ major faces accounting for at least 50 % of the total projected area preferably have an average diameter from 0.5 to 2.5 ⁇ m and an average thickness from 0.06 to at most 0.3 ⁇ m, and even more preferred to at most 0.2 ⁇ m.
- Said silver halide crystals may have been prepared in gelatin and/or in colloidal silica as a protective colloid. Preparations in colloidal silica have e.g. been described, in EP-A's 0 677 773; 0 682 287; 0 649 051 and 0 754 964.
- Supports and subbing layers coated adjacent thereto can be those as described in RD 36544 (published September 1994), chapter XV, polyethylene naphthalate inclusive.
- the hydrophobic resin support may be provided with one or more subbing layers known to those skilled in the art for adhering thereto a hydrophilic colloid layer.
- Suitable subbing layers for polyethylene terephthalate supports are described e.g. in US-A's 3,397,988, 3,649,336, 4,123,278 and 4,478,907.
- a useful subbing layer is disclosed e.g. in JP-A 01 166 031.
- Vinylidene chloride and styrene-butadiene copolymers are the most well-known polymers for practical use as subbing layer ingredients in the material to be processed according to the method of the present invention.
- Photographic silver halide emulsion materials suitable for use in the processing method of this invention are materials for continuous tone or halftone photography, microphotography and radiography, in black-and-white as well as colour photographic materials. Said materials are thus selected from the group consisting of materials having one or more light-sensitive silver halide emulsion layers at one or at both sides of the support.
- preferred materials are X-ray materials, single-side as well as double side coated, and more preferred medical X-ray materials.
- Said materials may be imagewise exposed by means of any radiation source, depending on their application as has been described e.g. in RD 36544, chapter XVI.
- Ecological advantages of the processing method of said imagewise exposed materials according to the present invention are related with the use of fixer solutions ready-for-use containing less than 4 g of aluminum per litre expressed as an equivalent amount of aluminum sulphate.
- a time saving factor is the total processing time: rapid processing proceeds within a time of less than 90 seconds, more preferred within a time of less than 50 seconds e.g. within a time from 20 to 45 seconds, in automatic processing machines as e.g. CURIX HT 530, trade marketed product from Agfa-Gevaert N.V..
- fixers having high sodium thiosulphate concentrations are preferred over fixers containing ammonium thiosulphate. They are useful in those circumstances wherein no replenishment system is available or where it is desirable to minimize the replenishment amounts. Such fixers retain a high silver binding capacity and a sufficient fixing speed even after prolonged continuous processing without replenishment or with minimum replenishment. An example thereof has been given in Research Disclosure 355 039, p. 736-737, published November 1, 1993.
- fixation proceeds in a fixer at a pH value of at least 4.6 and even more preferred in a fixer having a pH value of at least 5.0, a condition which can be better fulfilled the lower the concentration of aluminum ions is as precipitation of aluminum hydroxyde should be avoided.
- no aluminum is present at all as has already been established hereinbefore.
- drying preferably proceeds by means of infrared drying means as has e.g. been described in EP-A 0 620 482 for non-destructive testing film materials.
- infrared drying means as has e.g. been described in EP-A 0 620 482 for non-destructive testing film materials.
- improvement of surface characteristics is in the best mode, especially thanks to the composition of the antistress layer.
- a material according to the present invention offers, after rapid processing in hardener free developers and fixers as well as in hardener containing developers and fixers (wherein fixing preferably proceeds in the presence of low amounts of aluminum, preferably less than 4 g per liter of aluminum ions expressed as an equivalent amount of aluminum sulphate, having a pH value of at least 4.6 in order to avoid odour or smell), the desired properties, being absence of or significant reduction of water spot defects without loss of developability as can be concluded from sensitometric properties (especially speed and contrast) in rapid processing conditions (45 ⁇ processing, in automatic processing machines as well as in manual processing). In case of hardener free processing an excellent glare or gloss level is retained after said processing, again without loss in developability.
- a photographic material was prepared composed of
- reaction vessel 28 ml of solutions 1 and 2 were introduced into a reaction vessel in 28 seconds using the double jet technique.
- Said reaction vessel initially contained 2.127 liter of destilled water at 45°C, 10.6 grams of potassium bromide and 6 grams of inert gelatin and was held at 55°C. After one minute the reaction temperature of this mixture was raised to 70°C in 20 minutes and 47.5 grams of phthalated gelatin in 475 ml destilled water were added. After 10 minutes the neutralization step was started.
- a double jet precipitation was started using solutions 1 and 2: during 1 minute solution 1 was added at a flow rate of 7.5 ml per minute, while solution 2 was added at a rate of 7.7 ml/min., meanwhile maintaining the UAg value at + 10 mV.
- the double jet precipitation continued for 31 min. 30 seconds at a flow rate while increasing the rate of solution 1 up to 22.2 ml per minute and solution 2 up to 22.6 ml per minute, meanwhile maintaining the UAg value at + 10 mV again.
- solution 1 was injected in the reaction vessel at a flow rate of 7.5 ml per minute, while solution 3 was injected at the same flow rate.
- the flow rates were increased during 41 minutes and 50 seconds up to 37.5 ml per minute, meanwhile maintaining a UAg value in the reaction vessel of + 100 mV.
- the stirring velocity was decreased from 550 to 250 rpm.
- the tabular grains of the emulsion thus obtained had the following characteristics, measured with electron microscopic techniques:
- the dispersed emulsion was optimally sulphur and gold sensitized in the presence of sodium thiocyanate and anhydro-5,5'-dichloro-3,3'-bis(n. sulfobutyl)-9-ethyloxacarbocyanine hydroxide.
- reaction vessel 16.3 ml of solutions 1 and 2 were introduced into a reaction vessel in 35 seconds using the double jet technique.
- Said reaction vessel initially contained 2.127 liter of destilled water at 45°C, 10.6 grams of potassium bromide and 6 grams of inert gelatin and was held at 55°C. After one minute the reaction temperature of this mixture was raised to 70°C in 20 minutes and 47.5 grams of phthalated gelatin in 475 ml destilled water were added.
- the stirring velocity in the reaction vessel was held at 150 rpm. Before the first growth step the stirring velocity was increased up to 400 rpm.
- a double jet precipitation was started using solutions 1 and 2: during 1 minute solution 1 was added at a flow rate of 7.5 ml per minute, while solution 2 was added at a rate of 7.9 ml/min., meanwhile maintaining the UAg value (potential versus silver/silver chloride reference electrode) at - 15 mV.
- the double jet precipitation continued for 35 min. 38 seconds at a flow rate while increasing the rate of solution 1 up to 14.4 ml per minute and solution 2 up to 15.2 ml per minute, meanwhile maintaining the UAg value at - 15 mV again.
- solution 1 was injected in the reaction vessel at a flow rate of 7.5 ml per minute, while solution 3 was injected at the same flow rate.
- the flow rates were increased during 59 minutes and 30 seconds up to 22.5 ml per minute, meanwhile maintaining a UAg value in the reaction vessel of + 100 mV.
- the stirring velocity was thereafter decreased to 250 rpm.
- the tabular grains of the emulsion thus obtained had the following characteristics, measured with electron microscopic techniques:
- the pH value was lowered to 3.5 with diluted sulphuric acid and the emulsion was washed using demineralized water of 11°C.
- demineralized water 11°C.
- gelatin was added in order to have a gesi (ratio in grams of gelatin to silver) of 0.34 and demineralized water was added in order to have a total weight of 1923 grams.
- Values of pH and UAg at 40°C were adjusted to 5.5 and + 100 mV.
- the dispersed emulsion was optimally sulphur and gold sensitized in the presence of sodium thiocyanate and anhydro-5,5'-dichloro-3,3'-bis (n.sulfobutyl) -9-ethyl-oxacarbocyanine hydroxide.
- Each emulsion was stabilized with 4-hydroxy-6-methyl-1,3,3a,7-tetraazaindene. Both emulsions were mixed in order to get a ratio by weight of Emulsion A to Emulsion B of 4:1, gelatin was added and after addition of the normal coating additives the solutions were coated simultaneously together with a protective layer containing a variable amount of gelatin as indicated in Table 1 per m 2 and per side on both sides of a polyethylene terephthalate film support with a thickness of 175 ⁇ m.
- the said protective antistress layer was coated with the following compounds, expressed in grams per square meter per side: gelatin x 1 g polymethylmethacrylate (average particle diameter : 6 ⁇ m) 0.023 1-p-carboxyphenyl-4, 4'-dimethyl-3-pyrazolidine-1-one 0.054 oleyl-(OCH 2 CH 2 ) 10 OH (absent in the presence of an afterlayer) 0.056 formaldehyd(added just before coating) 0.1 CF 3 -(CF 2 ) 6 -COOH.NH 3 (absent in the presence of an afterlayer) 0.007
- Polymer latex given in formula (I) hereinbefore was added in variable amounts (y 1 g) as indicated in the same Table I.
- Polymer latex given in formula (I) hereinbefore was added in variable amounts (y 2 g) as indicated in the Tables where it applies.
- the resulting photographic material contained per side an amount of silver halide corresponding to 3.89 grams of AgNO 3
- the processing conditions and the composition of the processing solutions is given hereinafter.
- the processing of the described photographic materials in accordance with this invention proceeds in the processing machine CURIX HT530TM (Agfa-Gevaert) with following time (in seconds) and temperature (in °C) characteristics: loading 0.2 sec. developing 9.3 sec. 35°C(developer G138®,Agfa-Gevaert NV) cross-over 1.4 sec. rinsing 0.9 sec. cross-over 1.5 sec. fixing 6.6 sec. 35°C (fixer G334®,Agfa-Gevaert NV) cross-over 2.0 sec. rinsing 4.4 sec. 20°C cross-over 4.6 sec. drying 6.7 sec. total 37.6 sec.
- composition of the hardener-free developer -concentrated part : water 200 ml potassium bromide 12 grams potassium sulphite (65% solution) 249 grams ethylenediaminetetraacetic acid, sodium salt, trihydrate 9.6 grams hydroquinone 106 grams 5-methylbenzotriazole 0.076 grams 1-phenyl-5-mercaptotetrazole 0.040 grams sodiumtetraborate (decahydrate) 70 grams potassium carbonate 38 grams potassium hydroxide 49 grams diethylene glycol 11 grams potassium iodide 0.088 grams 4-hydroxymethyl-4-methyl-1phenyl 3-pyrazolidinone 12 grams Water to make 1 liter pH adjusted to 11.15 at 25°C with potassium hydroxide.
- composition of the hardener-free fixer -concentrated part : ammonium thiosulfate (78% solution) 661 grams sodium sulphite 54 grams boric acid 25 grams sodium acetate-trihydrate 70 grams acetic acid 40 grams water to make 1 liter pH adjusted with acetic acid to 5.30 at 25°C
Abstract
A light-sensitive silver halide photographic material has been
provided comprising a support and on one or both sides thereof at
least one light-sensitive silver halide emulsion layer, a gelatinous
protective antistress layer and, adjacent thereto as an outermost
layer, a gelatinous afterlayer characterized in that said afterlayer
comprises at least one polymer latex, being a polybutylacrylate, a
polybutylmethacrylate latex or a polyurethane latex, or a copolymer
latex being a copolymer poly(butyl methacrylate) polyacrylamide N-substituted
sulfo-isobutyl salt, in a ratio amount by weight of
(co)polymer latex to gelatin from 0.2:1 up to 5:1 and a total amount
of (co)polymer latex and gelatin of at least 0.10 g/m2.
Description
The invention is related to a light-sensitive silver halide
photographic material having satisfactory developability, reduced
pressure sensitivity and excellent surface characteristics after
processing in both hardener containing and hardener free processing.
Rapid processing becomes more and more important and therefore
the thickness of the light-sensitive hydrophilic colloid layers of a
photographic film is reduced and the hardening level is increased.
However this causes disadvantages related with pressure sensitivity
in the dry state before or in the wet state during processing.
Scratch formation in the wet state often occurs and a solution for
this may be offered by coating a thicker antistress layer with an
increased amount of binder e.g. gelatin. Although these increased
amounts have the advantage of giving rise to more surface glare
after processing, an inadmissable contamination or sludge formation
may occur in the processing solutions. Moreover a thicker
antistress layer may retard the processing, resulting in a decreased
developability, and drying velocity.
It has been established however that if the processing proceeds
in developer and fixer solutions containing hardening agents that
after treatment with said solutions and rinsing the film material
water is spreaded unevenly on the surface of the processed film
material. As a consequence unevenly dried water spots remain on the
film after the drying step at the end of the processing cycle as so
called "water spot defects".
It has been established otherwise that if the processing
proceeds with solutions free from hardening agents problems related
with surface characteristics occur as e.g. lack of surface glare
and, even more important, unevenness in glare over the processed
surface after rapid drying. A solution therefore can be found in
EP-A 0 806 705, wherein a method has been disclosed of processing an
image-wise exposed light-sensitive silver halide material by the steps
of developing, fixing in a fixer solution containing less than 4 g per
litre of aluminum ions expressed as an equivalent amount of aluminum
sulphate, rinsing and drying; characterized in that said material
comprises a support and on one or both sides thereof at least one
light-sensitive silver halide emulsion layer and a gelatinous
protective antistress layer, wherein said antistress layer comprises
at least one polymer latex in such an amount that there is a ratio by
weight of latex to gelatin is from 0.5 to 1.5 and wherein said
material is hardened to such an extent that its swelling degree after
immersing said material for 3 minutes in demineralized water of 25 °C
is not more than 300 % (a condition which does even not express very
high hardening levels). When no aluminum ions are present in the
fixer solution as in hardener free processing the problem of "water
spot defects" is not as stringent as in the presence thereof.
From practical experience it has been pointed out however that
that the presence of a polymer latex in the protective antistress
layer in order to avoid uneven surface glare or gloss as set forth in
EP-A 0 806 705 leads to lack for developability of the emulsion
crystals coated in the light-sensitive silver halide emulsion layer(s)
of the silver halide photographic material which causes problems,
especially in rapid processing applications.
Therefore it is a first object of the present invention to
provide a light-sensitive silver halide photographic material having
satisfactory surface characteristics, particularly reflected in the
absence of "water spot defects" due to uneven drying in the
processing cycle of automatic processors (in rapid processing cycles
from 90 as well as from 45 seconds) and even in manual processing
conditions.
It is still a further object of the present invention that all
measures taken in order to promote excellent surface characteristics
of the film material mentioned hereinbefore lay no burden on
the developability (sensitometric properties especially reflected by
speed and contrast) of the silver halide emulsion crystals coated in
the light-sensitive layer(s) of the said material, especially in the
short developing times provided in rapid processing cycles.
Other objects will become apparent from the description
hereinafter.
The above mentioned objects are realized by providing a light-sensitive
silver halide photographic material comprising a support
and on one or both sides thereof at least one light-sensitive silver
halide emulsion layer, a gelatinous protective antistress layer and,
adjacent thereto as an outermost layer, a gelatinous afterlayer
characterized in that said afterlayer comprises at least one polymer
latex, being a polybutylacrylate, a polybutylmethacrylate latex or a
polyurethane latex, or a copolymer latex being a copolymer
poly(butyl methacrylate) polyacrylamide N-substituted sulfo-isobutyl
salt, in a ratio amount by weight of (co)polymer latex to gelatin
from 0.2:1 up to 5:1 and a total amount of (co)polymer latex and
gelatin of at least 0.10 g/m2.
Specific features for preferred embodiments of the invention
are disclosed in the dependent claims.
Further advantages and embodiments of the present invention
will become apparent from the following description.
Preferred (co)polymer latices used in the protective antistress
layer and/or outermost afterlayer of the light-sensitive silver
halide material according to the present invention are cross-linked
polymers and can be prepared as described e.g. in US-A 4,301,240 by
emulsion polymerisation of aliphatic esters of acrylic and/or
methacrylic acid in water in the presence of polyfunctional crosslinking
monomers and an emulsifier, followed by saponification of
the obtained copolymer. By said emulsion polymerisation copolymers
with a molecular weight well above 500,000 are obtained and the
average particle size of the latex is smaller than 150 nm. Another
example of the synthesis of ionic cross-linked copolymers can
further be found e.g. in EP-A 0 452 568 and the corresponding US-A
5,472,832.
In photographic material of the present invention a
particularly preferred latex of an ionic copolymer for use in the
gelatinous protective antistress layer of a light-sensitive silver
halide material is a copolymer of butyl methacrylate and acrylamide-N-isobutylsulphonic
acid sodium salt as represented in the formula
(I).
In one embodiment in the copolymer according to the formula (I)
suitable for use in the material according to the present invention
a ratio amount of butylmethacrylate and and acrylamide-N-isobutyl-sulphonic
acid sodium salt is at least 80:20 and more preferably
about 95:5.
Other preferred latex compounds are polybutylacrylate and
polybutylmethacrylate as examples of non-ionic polymer latex
compounds. It is not excluded to use them in combination, e.g. in a
mixture with each other or even with other polymers dispersed as a
latex as there are polymethylmethacrylate, polymethylacrylate,
polyethylacrylate latex compounds and the like. Average particle
sizes of the latex particles are in the range from about 50 nm up to
about 115 nm as for the latex copolymer according to the formula (I)
given hereinbefore.
Another particularly preferred latex is a polyurethane latex,
which is preferably in the form of a dispersion of an aliphatic
anionic polyurethane. In praxis the commercially available product
IMPRANIL 43056, trademarked product from BAYER AG, Leverkusen, Federal
Republic of Germany is very suitable. This IMPRANIL-latex is
a 40 % aqueous dispersion of polyurethane prepared from DESMODUR W
(trademarked product from BAYER AG), which is a dicyclohexylmethane
diisocyanate, and a polyester having a low molecular weight of about
800. The average particle size of the latex may vary between 0.02
and 0.2 µm. The polyurethane is added to the coating solution as an
aqueous latex dispersion. An especially useful polyurethane is the
one having a high procentual amount of urethane groups, in order to
get a high degree of cross-linking and as a consequence low tendency
to sticking. Moreover the presence of a lubricant in an outermost
afterlayer on top of the protective antistress layer comprising said
polyurethane dispersion may be favourable. Said polyurethane latex
can moreover be loaded with e.g. a developing agent by addition of
the aqueous loadable polyurethane latex to a solution of useful
agent(s) as e.g. a developing agent in a water-miscible organic
solvent e.g. acetone, or by simultaneous addition of said latex and
said solution to an aqueous gelatinous solution as gelatin is a
preferred binder for this loaded latex. A mixture of developing
agents including a dihydroxybenzene like hydroquinone and a 3-pyrazolidine-1-one
developing agent as e.g. 1-phenyl-3-pyrazolidine-1-one
also known as "phenidone", being an electron transfer
agent or super additive developer, can be used in combination, in
that case preferably in a respective molar ratio of from 2/1 to
10/1. In that case dihydroxybenzene or dihydroxybenzenes is(are)
preferably present in an amount of from 0.05 to 0.5 g for a coverage
of silver halide equivalent with 1 g of silver nitrate. Ascorbic
acid, iso-ascorbic acid whether or not in combination with the
preferred developing agent(s) can also be used. In this way a so-called
"activation material" can be obtained which can be developed
by means of an alkaline solution. In a preferred embodiment the
material according to the present invention when comprising a
polyurethane as polymer latex, said latex is an aliphatic anionic
polyurethane.
It is clear that different latex (co)polymers can be added to
the gelatinous protective antistress layer and/or to the gelatinous
afterlayer: mixtures thereof can be added in different amounts.
In the present invention one or more latex (co)polymer(s)
is(are) optionally present in the gelatinous protective antistress
layer as the objects of the present invention are also fulfilled
when said protective antistress layer is free from any polymer latex.
It is however required for the latex (co)polymer(s) to be at least
present in the outermost gelatinous afterlayer of the material
according to the present invention: at least one (co)polymer latex
in a ratio amount by weight of (co)polymer latex to gelatin from
0.2:1 up to 5:1, and more preferably in a ratio of from 0.3:1 up to
3:1, and a total amount of (co)polymer latex and gelatin of at least
0.10 g/m2 is required.
According to the present invention said material has a total
amount of (co)polymer latex and gelatin of up to 1.2 g/m2 in said
outermost gelatinous afterlayer, which is in favour of better
spreading of water in the rinsing step (and even drying properties
or absence of "water spot defects") and in favour of pressure
sensitivity. For reasons of developability it is however preferred
not to add higher amounts as otherwise sensitometry may be
influenced, especially in rapid processing conditions.
Preferred amounts of gelatin in said outermost afterlayer are
in the range from 0.10-0.40 g/m2, whereas preferred amounts of latex
(co)polymer(s) are in the range from 0.05-0.60 g/m2 and more
preferably in the range from 0.10-0.40 g/m2.
More particularly in order to lay no burden on developability
the material according to the present invention is coated with an
amount of gelatin as a binder material (known as gelatin coverage) in
the protective antistress coating of not more than than 1.5 g per m2
and more preferably in the range of from 0.20 to 1.0 g per m2 and in
the outermost afterlayer the gelatin coverage is in the range of from
0.05 to 0.50 g per m2, more preferably from 0.10 to 0.40 g per m2 and
still more preferably from 0.20 to 0.40 g per m2.
As the material according to the present invention is also
intended to be processable in a developer and a fixer without
hardeners (like the environmental unfriendly glutaraldehyd) the
material of the present invention is hardened to such an extent that
its swelling degree after immersing said material for 3 minutes in
demineralized water of 25 °C is not more than 300 %, and even more
preferably less than 200 %. Especially for application in processing
cycles of less than 50 seconds said swelling degree should not be
higher.
The said latex-type (co)polymers may further optionally be
present in one or more emulsion layer(s) coated between the
protective antistress layer and a subbed support, the subbing layer
of which may be overcoated with at least one gelatinous intermediate
layer.
Layers and layer arrangements which can be applied to the film
material, apart from the requirement to have an afterlayer, coated
adjacent and as an outermost layer of the material of the present
invention are those described in US-A's 4,092,168; 4,311,787 and
5,693,370 and in EP-A 's 0 712 034; 0 712 036; 0 677 773; 0 678 772;
0 610 608; 0 610 609 and 0 569 075, in DE- A 2,453,217 and in GB-A
7,907,440.
In the antistress layer and in the afterlayer of the material
of the present invention comprising (whether or not optionally as
for the protective antistress layer) a polyurethane latex and/or the
latex-type polymers or copolymers described hereinbefore,
hydrophilic colloid binders differing from gelatin that can be
homogeneously mixed therewith may be present and are e.g. other
proteinaceous colloids, polysaccharides as e.g. starch and
polydextranes, as well as synthetic substitutes for gelatin as e.g.
poly-N-vinylpyrrolidone, polyvinyl alcohol, polyacrylamide, polyacrylic
acid, polyamethyl-acrylate, polyethyl-acrylate, polymethyl-methacrylate,
polyethyl-methacrylate, polyvinyl imidazole, polyvinyl
pyrazole and derivatives thereof as well as styrene-maleïc acid or a
styrene-maleïc acid anhydrid type copolymer. To the ionic or non-ionic
latex polymers can be added in addition non-ionic surfactants
such as saponins, alkylene oxides e.g. polyethylene glycol,
polyethylene glycol/polypropylene glycol condensation products,
polyethylene glycol alkyl ethers or polyethylene glycol alkylaryl
ethers, polyethylene glycol esters, polyethylene glycol sorbitan
esters, polyalkylene glycol alkylamines or alkylamides, silicone
polyethylene oxide adducts, glycidol derivatives, fatty acid esters
of polyhydric alcohols and alkyl esters of saccharides; anionic
agents comprising an acid group such as a carboxy-, sulpho-,
phospho-, sulphuric or phosphoric ester group; ampholytic agents
such as aminoacids, aminoalkyl sulphonic acids, aminoalkyl sulphates
or phosphates, alkyl betaines, and amine-N-oxides; and cationic
agents such as alkylamine salts, aliphatic, aromatic, or heterocyclic
quaternary ammonium salts, aliphatic or heterocyclic ring-containing
phosphonium or sulphonium salts. Such surface-active
agents can be used for various purposes e.g. as coating aids, as
compounds preventing electric charges, as compounds improving
slidability, as compounds facilitating dispersive emulsification, as
compounds preventing or reducing adhesion, and as compounds
improving the photographic characteristics e.g higher contrast,
sensitization, and development acceleration.
Furthermore the use of mixtures of said hydrophilic colloids is
not excluded. Among these binders as already set forth hereinbefore
the most preferred one is gelatin. Conventional lime-treated or
acid treated gelatin can be used. The preparation of such gelatin
types has been described in e.g. "The Science and Technology of
Gelatin", edited by A.G. Ward and A. Courts, Academic Press 1977, p.
295 and next pages. The gelatin can also be an enzyme-treated gelatin
as described in Bull. Soc. Sci. Phot. Japan, N° 16, p.30 (1966).
In order to minimize the amount of gelatin, said gelatin can be
replaced in part or integrally by synthetic polymers as cited
hereinbefore or by natural or semi-synthetic polymers. Natural
substitutes for gelatin are e.g. other proteins such as zein,
albumin and casein, cellulose, saccharides, starch, and alginates.
Semi-synthetic substitutes for gelatin are modified natural products
as e.g. gelatin derivatives obtained by conversion of gelatin with
alkylating or acylating agents or by grafting of polymerisable
monomers on gelatin, and cellulose derivatives such as hydroxyalkyl
cellulose, carboxymethyl cellulose, phthaloyl cellulose, and
cellulose sulphates.
In a preferred embodiment gelatin in the antistress layer is
partially replaced by colloidal silica as it gives rise to a further
improvement of the obtained properties of the material according to
the present invention. Preferably colloidal silica having an
average particle size of not larger than 10 nm and having a surface
area of at least 300 m2 per gram is used. Especially preferred
colloidal silica particles have a surface area of 500 m2 per gram
and an average grain size smaller than 7 nm. Such type of silica is
sold under the name KIESELSOL 500 (KIESELSOL is a registered trade
name of Bayer AG, Leverkusen, West-Germany). Colloidal silica is
preferably present at a coverage of at least 50 mg per m2. Further
the coverage of said colloidal silica in the anti-stress layer is
preferably in the range of 50 mg to 500 mg per m2.
In admixture with the hardened gelatin the antistress layer may
further contain friction-lowering substance(s) such as dispersed wax
particles (carnaubawax or montanwax) or polyethylene particles,
fluorinated polymer particles, silicon polymer particles etc., in
order to further reduce the sticking tendency of the layer
especially in an atmosphere of high relative humidity.
The gelatin binder can be forehardened with appropriate hardening
agents such as those of the epoxide type, those of the
ethylene-mine type, those of the vinylsulfone type as e.g. 1,3-vinylsulphonyl-2-propanol,
bis-vinyl-sulphonyl methyl or bis-vinyl
sulphonyl ethyl ether, hydroxy substituted vinyl sulphonyl
hardeners, chromium salts as e.g. chromium acetate and chromium
alum, aldehydes as e.g. formaldehyde, glyoxal, and glutaraldehyde,
N-methylol compounds as e.g. dimethylolurea and methyloldimethylhydantoin,
dioxan derivatives as e.g. 2,3-dihydroxy-dioxan, active
vinyl compounds as e.g. 1,3, 5-triacryloyl-hexahydro-s-triazine,
active halogen compounds as e.g. 2,4-dichloro-6-hydroxy-s-triazine,
and mucohalogenic acids as e.g. mucochloric acid and mucophenoxychloric
acid. These hardeners can be used alone or in combination.
The binder can also be hardened with fast-reacting hardeners such as
carbamoylpyridinium salts as disclosed in US-A 4,063,952 and with
the onium compounds disclosed in EP-A 0 408 143.
To the ionic or non-ionic latex polymers or latex co-polymeric
combinations of monomers cited hereinbefore can optionally be added
in addition non-ionic surfactant(s) having antistatic characteristics
such as e.g. polyoxyethylene compounds. In a more preferred
embodiment the said surfactant(s) is(are) present in an optionally
present outermost layer. Said layer may be a gelatin free
afterlayer or a thin gelatinous layer. In a preferred embodiment a
latex (co)polymer having antistatic properties is added to the
protective antistress layer containing the latex (co)polymer(s) set
forth hereinbefore. Said latex (co)polymer is present in an amount
of up to 0.5 g/m2 per side. A preferred one is the latex of a
cross-linked polymer, being a copolymer of an acrylic and/or
methacrylic acid ester including 90-99 mole % of acrylate and/or
methacrylate units and 1 to 10 mole % of tetraallyloxyethane units
as polyfunctional crosslinking monomer, wherein in said copolymer at
least 75 % of the ester groups have been transformed into alkali
metal carboxylate groups, thus exhibiting ionic characteristics:
especially preferred as a cross-linked ionic polymer is
poly( [c.l.] tetraallyloxyethane-co-methyl acrylate/acrylic acid), the
formula (II) of which is given hereinafter with a preferable 3/18/79
molar ratio.
Other antistatic agents can be provided therein as has e.g.
been given in US-A 5,391,472. The afterlayer may further comprise
spacing agents and coating aids such as wetting agents as e.g.
perfluorinated surfactants. Spacing agents which may also be
present in the protective antistress layer in generally have an
average particle size which is comprised between 0.2 and 10 µm.
Spacing agents can be soluble or insoluble in alkali. Alkali-insoluble
spacing agents usually remain permanently in the
photographic element, whereas alkali-soluble spacing agents usually
are removed therefrom in an alkaline processing bath. Suitable
spacing agents can be made i.a. of polymethyl methacrylate, of
copolymers of acrylic acid and methyl methacrylate, and of
hydroxypropylmethyl cellulose hexahydrophthalate. Other suitable
spacing agents have been described in US-A 4,614,708.
The coating of the layers of the material of the present
invention may proceed by any coating technique known in the art, as
e.g. by doctor blade coating, air knife coating, curtain coating,
slide hopper coating or meniscus coating, which are coating
techniques known from the production of photographic silver emulsion
layer materials.
In order to regulate the viscosity of the coating solutions
used for any of the said coating techniques provided that they do
not particularly affect the photographic characteristics of the
silver halide light-sensitive photographic material. Preferred
thickening agents include aqueous polymers such as polystyrene
sulphonic acid, sulphuric acid esters, polysaccharides, polymers
having a sulphonic acid group, a carboxylic acid group or a
phosphoric acid group, polyacrylamide, polymethacrylic acid or its
salt, copolymers from acrylamide and methacrylic acid and salts
derived thereof, copolymers from 2-acrylamido-2-methyl-propane
sulphonic acid, polyvinyl alcohol, alginate, xanthane, carraghenan,
synthetic (smectite) clays and the like. Polymeric thickeners well-known
from the literature resulting in thickening of the coating
solution may be used independently or in combination. Patents
concerning thickening agents are e.g. US-A 3,167,410, Belgian Patent
No. 558,143, JP-A's 53/18687 and 58/36768 and DE-A 3 836 945.
In addition to the binder(s), silver halide(s) and, optionally,
developing agent(s) the silver halide photographic material may
contain in the light-sensitive emulsion layer(s) and/or in one or
more layers in water-permeable relationship with said silver halide
emulsion layer(s) any of the kinds of compounds customarily used in
such layers for improving the photographic process, manufacture or
preservability (storage). For example such layers may incorporate
one or more coating aids, stabilising agents or antifogging agents
as described e.g. in GB-A 1,007,020 filed March 6, 1963 by Agfa
A.G., plasticizers, development-modifying agents e.g. polyoxyalkylene
compounds, onium compounds, and sulphur compounds of the class
which have sulphur covalently bound derived from an ion such as a
mercaptide or xanthate or coordinately bound sulphur from a
thioether. Preferably thioethers acting as silver chelating agents
with at least two sulphur atoms as donors are used. A survey of
thioether compounds suitable for incorporation in silver halide
emulsion layers of widely varying silver halide composition has been
given in the EP-A 0 026 520. Useful compounds have further been
described in EP-A's 0 634 688 and 0 674 215.
Silver halide emulsion crystals used in the silver halide
emulsion layer(s) of the material of the present invention are
composed of silver chloride, silver chlorobromide, silver
chloroiodide, silver chlorobromoiodide, silver bromide or silver
bromoiodide. Regular as well as tabular crystals may be present, as
well as mixtures thereof. Crystals having a different crystal habit
may be coated in different layers as e.g. in EP-A 0 770 909.
In view of developability amounts of iodide of not more than 2
mole % are preferred in said silver halide crystals and even more
preferred is an iodide content of from 0.1 to 1 mole %. Silver
halide crystals having a regular crystal habit preferably have an
average grain size of at least 0.15 µm, up to at most 1.2 µm, more
preferably up to 1.0 µm and still more preferably up to 0.8 µm.
Silver halide crystals having tabular {111} major faces accounting
for at least 50 % of the total projected area preferably have an
average diameter from 0.5 to 2.5 µm and an average thickness from
0.06 to at most 0.3 µm, and even more preferred to at most 0.2 µm.
Average aspect ratios of from 2 to 20 and more preferred from 5 to
15 are preferred. Said silver halide crystals may have been
prepared in gelatin and/or in colloidal silica as a protective
colloid. Preparations in colloidal silica have e.g. been described,
in EP-A's 0 677 773; 0 682 287; 0 649 051 and 0 754 964.
Supports and subbing layers coated adjacent thereto, useful for
the film materials according to the present invention, can be those
as described in RD 36544 (published September 1994), chapter XV,
polyethylene naphthalate inclusive.
The hydrophobic resin support may be provided with one or more
subbing layers known to those skilled in the art for adhering
thereto a hydrophilic colloid layer. Suitable subbing layers for
polyethylene terephthalate supports are described e.g. in US-A's
3,397,988, 3,649,336, 4,123,278 and 4,478,907. For high speed
processing applications a useful subbing layer is disclosed e.g. in
JP-A 01 166 031. Vinylidene chloride and styrene-butadiene
copolymers are the most well-known polymers for practical use as
subbing layer ingredients in the material to be processed according
to the method of the present invention.
Photographic silver halide emulsion materials, suitable for use
in the processing method of this invention are materials for
continuous tone or halftone photography, microphotography and
radiography, in black-and-white as well as colour photographic
materials. Said materials are thus selected from the group
consisting of materials having one or more light-sensitive silver
halide emulsion layers at one or at both sides of the support.
According to the present invention preferred materials are X-ray
materials, single-side as well as double side coated, and more
preferred medical X-ray materials.
Said materials may be imagewise exposed by means of any
radiation source, depending on their application as has been
described e.g. in RD 36544, chapter XVI.
Ecological advantages of the processing method of said
imagewise exposed materials according to the present invention are
related with the use of fixer solutions ready-for-use containing
less than 4 g of aluminum per litre expressed as an equivalent
amount of aluminum sulphate. A already told the developer is free
from the generally used well-known glutardialdehyde hardener. A
time saving factor is the total processing time: rapid processing
proceeds within a time of less than 90 seconds, more preferred
within a time of less than 50 seconds e.g. within a time from 20 to
45 seconds, in automatic processing machines as e.g. CURIX HT 530,
trade marketed product from Agfa-Gevaert N.V..
For ecological reasons fixers having high sodium thiosulphate
concentrations are preferred over fixers containing ammonium
thiosulphate. They are useful in those circumstances wherein no
replenishment system is available or where it is desirable to
minimize the replenishment amounts. Such fixers retain a high
silver binding capacity and a sufficient fixing speed even after
prolonged continuous processing without replenishment or with
minimum replenishment. An example thereof has been given in
Research Disclosure 355 039, p. 736-737, published November 1, 1993.
In order to reduce or to minimize odour by formation of sulphur
dioxide fixation proceeds in a fixer at a pH value of at least 4.6
and even more preferred in a fixer having a pH value of at least
5.0, a condition which can be better fulfilled the lower the
concentration of aluminum ions is as precipitation of aluminum
hydroxyde should be avoided. In the most preferred embodiment no
aluminum is present at all as has already been established
hereinbefore.
After fixing and rinsing, drying preferably proceeds by means
of infrared drying means as has e.g. been described in EP-A 0 620
482 for non-destructive testing film materials. In these drying
circumstances improvement of surface characteristics is in the best
mode, especially thanks to the composition of the antistress layer.
As a result use of a material according to the present
invention offers, after rapid processing in hardener free developers
and fixers as well as in hardener containing developers and fixers
(wherein fixing preferably proceeds in the presence of low amounts
of aluminum, preferably less than 4 g per liter of aluminum ions
expressed as an equivalent amount of aluminum sulphate, having a pH
value of at least 4.6 in order to avoid odour or smell), the desired
properties, being absence of or significant reduction of water spot
defects without loss of developability as can be concluded from
sensitometric properties (especially speed and contrast) in rapid
processing conditions (45¨ processing, in automatic processing
machines as well as in manual processing). In case of hardener free
processing an excellent glare or gloss level is retained after said
processing, again without loss in developability.
A photographic material was prepared composed of
- a subbed polyester base (175 µm thick);
- an emulsion layer comprising a mixture of two gelatinous silver halide emulsions (preparation described hereinafter) of which the silver halide consists for 99 mole % of silver bromide and 1 mole % of silver iodide having a {111} tabular crystal habit;
- a protective antistress layer having the composition given hereinafter.
- an afterlayer as an outermost layer (in the examples where it applies)
28 ml of solutions 1 and 2 were introduced into a reaction vessel in
28 seconds using the double jet technique. Said reaction vessel
initially contained 2.127 liter of destilled water at 45°C, 10.6
grams of potassium bromide and 6 grams of inert gelatin and was held
at 55°C. After one minute the reaction temperature of this mixture
was raised to 70°C in 20 minutes and 47.5 grams of phthalated
gelatin in 475 ml destilled water were added. After 10 minutes the
neutralization step was started.
During nucleation the stirring velocity in the reaction vessel was
held at 150 rpm.
21.25 ml of solution 1 were added to the reaction vessel at a rate
of 7.5 ml per minute to reach a UAg value (potential versus
silver/silver chloride reference electrode) of + 10 mV, whereafter
the first growth step was started.
A double jet precipitation was started using solutions 1 and 2:
during 1 minute solution 1 was added at a flow rate of 7.5 ml per
minute, while solution 2 was added at a rate of 7.7 ml/min.,
meanwhile maintaining the UAg value at + 10 mV.
The double jet precipitation continued for 31 min. 30 seconds at a
flow rate while increasing the rate of solution 1 up to 22.2 ml per
minute and solution 2 up to 22.6 ml per minute, meanwhile
maintaining the UAg value at + 10 mV again.
Thereafter the second neutralization phase was started.
26.25 ml of solution 1 was added at a rate of 7.5 ml per minute in 3
min. 30 seconds so that a UAg value of + 100 mV was obtained. The
precipitation was then continued by a second growth step.
During 30 seconds solution 1 was injected in the reaction vessel at
a flow rate of 7.5 ml per minute, while solution 3 was injected at
the same flow rate. After increasing the stirring velocity up to
550 rpm during 30 seconds, the flow rates were increased during 41
minutes and 50 seconds up to 37.5 ml per minute, meanwhile
maintaining a UAg value in the reaction vessel of + 100 mV.
The stirring velocity was decreased from 550 to 250 rpm.
The tabular grains of the emulsion thus obtained had the following
characteristics, measured with electron microscopic techniques:
- average equivalent circular diameter (ECD): 1.04 µm
- coefficient of variation of the tabular grains on ECD: 0.30
- average thickness: 0.22 µm
- average aspect ratio : 4.8
- percentage of total projective surface: 93 %.
After the emulsion precitation was ended the pH value was
lowered to 3.5 with diluted sulphuric acid and the emulsion was
washed using demineralized water of 11°C. At 45°C to the
flocculate, having a volume of 1350 ml gelatin was added in order to
have a gesi (ratio in grams of gelatin to silver) of 0.34 and
demineralized water was added in order to have a total weight of
1923 grams. Values of pH and UAg at 40°C were adjusted to 5.5 and +
100 mV.
The dispersed emulsion was optimally sulphur and gold
sensitized in the presence of sodium thiocyanate and
anhydro-5,5'-dichloro-3,3'-bis(n. sulfobutyl)-9-ethyloxacarbocyanine
hydroxide.
16.3 ml of solutions 1 and 2 were introduced into a reaction vessel
in 35 seconds using the double jet technique. Said reaction vessel
initially contained 2.127 liter of destilled water at 45°C, 10.6
grams of potassium bromide and 6 grams of inert gelatin and was held
at 55°C. After one minute the reaction temperature of this mixture
was raised to 70°C in 20 minutes and 47.5 grams of phthalated
gelatin in 475 ml destilled water were added.
During nucleation the stirring velocity in the reaction vessel was
held at 150 rpm. Before the first growth step the stirring velocity
was increased up to 400 rpm.
A double jet precipitation was started using solutions 1 and 2:
during 1 minute solution 1 was added at a flow rate of 7.5 ml per
minute, while solution 2 was added at a rate of 7.9 ml/min.,
meanwhile maintaining the UAg value (potential versus silver/silver
chloride reference electrode) at - 15 mV.
The double jet precipitation continued for 35 min. 38 seconds at a
flow rate while increasing the rate of solution 1 up to 14.4 ml per
minute and solution 2 up to 15.2 ml per minute, meanwhile
maintaining the UAg value at - 15 mV again.
Thereafter the second neutralization phaze was started.
75 ml of solution 1 was added at a rate of 7.5 ml per minute in 10
min. so that a UAg value of + 100 mV was obtained. The precipitation
then continued by a second growth step.
During 60 seconds solution 1 was injected in the reaction vessel at
a flow rate of 7.5 ml per minute, while solution 3 was injected at
the same flow rate. The flow rates were increased during 59 minutes
and 30 seconds up to 22.5 ml per minute, meanwhile maintaining a UAg
value in the reaction vessel of + 100 mV.
The stirring velocity was thereafter decreased to 250 rpm.
The tabular grains of the emulsion thus obtained had the following
characteristics, measured with electron microscopic techniques:
- average equivalent circular diameter (ECD): 1.30 µm
- coefficient of variation of the tabular grains : 0.40
- average thickness: 0.23 µm
- average aspect ratio : 6.0
- percentage of total projective surface: 92 %.
After the emulsion precitation was ended the pH value was lowered to
3.5 with diluted sulphuric acid and the emulsion was washed using
demineralized water of 11°C. At 45°C to the flocculate, having a
volume of 1250 ml, gelatin was added in order to have a gesi (ratio
in grams of gelatin to silver) of 0.34 and demineralized water was
added in order to have a total weight of 1923 grams. Values of pH
and UAg at 40°C were adjusted to 5.5 and + 100 mV.
The dispersed emulsion was optimally sulphur and gold sensitized in
the presence of sodium thiocyanate and anhydro-5,5'-dichloro-3,3'-bis
(n.sulfobutyl) -9-ethyl-oxacarbocyanine hydroxide.
Each emulsion was stabilized with 4-hydroxy-6-methyl-1,3,3a,7-tetraazaindene.
Both emulsions were mixed in order to get a ratio by
weight of Emulsion A to Emulsion B of 4:1, gelatin was added and
after addition of the normal coating additives the solutions were
coated simultaneously together with a protective layer containing a
variable amount of gelatin as indicated in Table 1 per m2 and per
side on both sides of a polyethylene terephthalate film support with
a thickness of 175 µm.
The said protective antistress layer was coated with the following
compounds, expressed in grams per square meter per side:
gelatin | x1 g |
polymethylmethacrylate (average particle diameter : 6 µm) | 0.023 |
1-p-carboxyphenyl-4, 4'-dimethyl-3-pyrazolidine-1-one | 0.054 |
oleyl-(OCH2CH2)10OH (absent in the presence of an afterlayer) | 0.056 |
formaldehyd(added just before coating) | 0.1 |
CF3-(CF2)6-COOH.NH3 (absent in the presence of an afterlayer) | 0.007 |
Polymer latex given in formula (I) hereinbefore was added in
variable amounts (y1 g) as indicated in the same Table I.
gelatin | x2 g |
oleyl- (OCH2CH2) 10OH | 0.056 |
CF3- (CF2)6-COOH.NH3 | 0.007 |
Polymer latex given in formula (I) hereinbefore was added in
variable amounts (y2 g) as indicated in the Tables where it applies.
Use was made of the slide hopper coating technique for simultaneous
application of the emulsion coating in the silver halide containing
layer, the antistress coating and the afterlayer.
The resulting photographic material contained per side an amount of
silver halide corresponding to 3.89 grams of AgNO3
Samples of these coatings were exposed with green light of 540 nm
during 0.1 seconds using a continuous wedge and were and 2.16 g of
gelatin per m2 .processed during the 45 seconds cycle described below.
The density as a function of the light dose was measured and
therefrom were determined the following parameters:
- fog level F (with an accuracy of 0.001 density);
- sensitivity S at a density of 1 above fog measured as log E(xposure) : a lower value is indicative for a higher sensitivity;
- contrast C, calculated between densities 0.25 and 2.0 above fog.
"Water spot defects", "gloss" and "pressure sensitivity" were
evaluated as follows.
The processing conditions and the composition of the processing
solutions is given hereinafter. The processing of the described
photographic materials in accordance with this invention proceeds in
the processing machine CURIX HT530™ (Agfa-Gevaert) with following
time (in seconds) and temperature (in °C) characteristics:
loading | 0.2 sec. | |
developing | 9.3 sec. | 35°C(developer G138®,Agfa-Gevaert NV) |
cross-over | 1.4 sec. | |
rinsing | 0.9 sec. | |
cross-over | 1.5 sec. | |
fixing | 6.6 sec. | 35°C (fixer G334®,Agfa-Gevaert NV) |
cross-over | 2.0 sec. | |
rinsing | 4.4 sec. | 20°C |
cross-over | 4.6 sec. | |
drying | 6.7 sec. | |
total | |
As a series of comparative X-ray photographic materials
materials were prepared with on top a protective antistress layer
covering the silver halide emulsion layer, thus in the absence of an
afterlayer. Sensitometric results are summarized in Table 1.
Film | Fog F (x 1000) | Speed S ( x 100) | Contrast C | x1 g/m2 of gelatin | y1 g/m2 of polymer latex | Water spot defects. | Pressure Sensitivity |
A' | 23 | 158 | 3.09 | 1.10 | 0.00 | 4.5 | 2.5 |
B' | 22 | 159 | 2.99 | 1.10 | 0.30 | 4.5 | 2.5 |
C' | 22 | 160 | 2.87 | 1.10 | 0.60 | 4.5 | 2 |
D' | 22 | 161 | 2.66 | 1.10 | 1.10 | 4.5 | 1.5 |
E' | 21 | 158 | 3.05 | 0.65 | 0.00 | 4 | 3.5 |
F' | 19 | 160 | 2.85 | 0.65 | 0.65 | 4.5 | 2.5 |
G' | 21 | 157 | 2.99 | 0.20 | 0.00 | 3 | 4.5 |
H' | 18 | 158 | 3.03 | 0.20 | 0.20 | 3 | 3.5 |
These comparative materials A'-H' without afterlayer, having an
analoguous composition as those described in EP-A 0 806 705 and the
corresponding US-A 5,800,969, are not satisfying the requirements of
the present invention as water spot defects and pressure sensitivity
are not sufficient simultaneously as becomes clear from the figures in
Tabel 1. These results are obviously not related with sensitometric
differences as said differences are negligible, although a trend to
lower contrast (as e.g. for D') is present.
In Table 2 hereinafter data have been given for materials which
have been coated with an afterlayer as outermost layer as described
hereinbefore with variable amounts of gelatin (x2) and polymer latex
(y2) but without enhancing the total coating amount of gelatin and
polymer latex over the protective layer and the afterlayer (total
amount: 1.1 g for all materials). Differences in the protective
antistress layers for amounts of gelatin (x1) and polymer latex (y1)
have also been given.
Film | F | S | C | x1 g/m2 of gelatin | y1 g/m2 polymer latex | x2 g/m2 of gelatin | y2 g/m2 polymer latex | WSD | PS |
A(comp) | 23 | 158 | 3.09 | 1.10 | 0.00 | 0.00 | 0.00 | 4.5 | 2.5 |
B(comp) | 18 | 159 | 2.89 | 0.55 | 0.55 | 0.00 | 0.00 | 4.0 | 3.0 |
C(comp) | 22 | 158 | 3.09 | 1.00 | 0.00 | 0.10 | 0.00 | 5.0 | 3.0 |
D(inv) | 21 | 158 | 3.10 | 0.95 | 0.00 | 0.10 | 0.05 | 3.0 | 3.0 |
E(inv) | 20 | 158 | 3.11 | 0.90 | 0.00 | 0.10 | 0.10 | 2.0 | 2.5 |
F(inv) | 25 | 158 | 2.13 | 0.80 | 0.00 | 0.10 | 0.20 | 2.0 | 2.5 |
G(comp) | 22 | 158 | 3.08 | 0.90 | 0.00 | 0.20 | 0.00 | 5.0 | 3.0 |
H(inv) | 20 | 158 | 3.08 | 0.80 | 0.00 | 0.20 | 0.10 | 3.0 | 3.0 |
I(inv) | 19 | 158 | 3.09 | 0.70 | 0.00 | 0.20 | 0.20 | 2.0 | 3.0 |
J(inv) | 22 | 158 | 3.09 | 0.50 | 0.00 | 0.20 | 0.40 | 2.0 | 2.5 |
K(comp) | 21 | 158 | 3.06 | 0.70 | 0.00 | 0.40 | 0.00 | 5.5 | 3.0 |
L(inv) | 19 | 158 | 3.05 | 0.50 | 0.00 | 0.40 | 0.20 | 3.0 | 2.5 |
M(inv) | 18 | 159 | 3.04 | 0.30 | 0.00 | 0.40 | 0.40 | 1.0 | 2.5 |
Apart from the excellent developability, reflected in the
sensitometric data from Table 2 which are almost constant for the
materials A-M (except for B where too low a contrast is measured), it
is clear that as long as the ratio by weight of polymer latex and
gelatin in the afterlayer is more than 0.3 and as long as the total
amount of polymer latex and gelatin does not exceed a value of about
0.8 g/m2 materials having negligible water spot defects and negligible
pressure sensitivity are obtained as is the case for the materials
D,E,F,H,I,J,L and M.
In Table 3 hereinafter data have been given for materials which
have been coated with an afterlayer as described hereinbefore with
variable amounts of gelatin (x2) and polymer latex (y2) but without
making use of a polymer latex in the protective antistress layer,
wherein a constant amount of gelatin has been coated of x1 1.1 g/m2
for each material N-V. Differences in the total amounts of the sum of
gelatin (x1+x2) and polymer latex (y2, as y1=0) have also been given
as well as ratios of polymer latex and gelatin in the afterlayer
(y2/x2).
Film | F | S | C | x1+x2 + y2 in g/m2 | y2 g/m2 polymer latex | x2 g/m2 of gelatin | y2/x2 | WSD | PS |
N | 30 | 158 | 3.16 | 1.40 | 0.20 | 0.10 | 2.00 | 1.5 | 2.5 |
O | 23 | 158 | 3.11 | 1.30 | 0.00 | 0.20 | 0.00 | 5.0 | 2.5 |
P | 22 | 158 | 3.12 | 1.40 | 0.10 | 0.20 | 0.50 | 3.0 | 2.5 |
Q | 22 | 158 | 3.13 | 1.50 | 0.20 | 0.20 | 1.00 | 1.5 | 2.5 |
R | 30 | 158 | 3.16 | 1.70 | 0.40 | 0.20 | 2.00 | 1.5 | 2.5 |
S | 22 | 157 | 3.11 | 1.60 | 0.10 | 0.40 | 0.25 | 4.0 | 2.5 |
T | 22 | 157 | 3.12 | 1.70 | 0.20 | 0.40 | 0.50 | 3.0 | 2.5 |
U | 22 | 157 | 3.13 | 1.90 | 0.40 | 0.40 | 1.00 | 1.5 | 2.5 |
V | 30 | 157 | 3.16 | 2.30 | 0.80 | 0.40 | 2.00 | 1.0 | 2.0 |
As becomes clear from Table 3 hereinbefore, even in the absence
of any polymer latex in the protective antistress layer very good
figures indicating low pressure sensitivity and absence of water spot
defects are obtained, provided that at least a polymer latex is
present in the afterlayer.
In the range from about 1:1 up to at least 2:1 for ratios by
weight of polymer latex and gelatin in the afterlayer, adjacent to the
protective antistress layer, satisfying results for water spot defects
and pressure sensitivity are obtained without negatively influencing
sensitometric characteristics. Whereas from the figures in Table 3
pressure sensitivity is almost independent on the composition of the
afterlayer water spot defects are clearly related with the presence
the polymer latex in the afterlayer.
In Table 4 hereinafter data have been given for materials which
have been coated with an afterlayer as described hereinbefore with
variable amounts of gelatin (x2) and different types and amounts of
polymer latex (y2) and wherein also in the protective layer variable
amounts of latex polymer of different types are added. In the
protective layer a constant amount of gelatin (x1) has been coated
(0.71 g/m2). Differences in the total amounts of the sum of gelatin
(x1+x2) and polymer latex (y1+y2) have also been given as well as
ratios of polymer latex and gelatin in the afterlayer (y2/x2).
In the protective layer only for material "W" 0.6 g/m2 of polymer
latex was coated (y1).
Following latex type polymers were used in the different coatings:
- W and W': copolymer poly(butyl methacrylate) polyacrylamide N-substituted sulfo-isobutyl sodium salt (see formula I) in a ratio amount of butyl methacrylate and acrylamide N-substituted sulfo-isobutyl sodium salt of 95:5;
- X: polybutylacrylate latex
- Y: polybutylmethacrylate latex
- Z: polymethylmethacrylate latex )
- Z' : polyethylacrylate latex
"Water spot defects" were evaluated in hardener containing processing
solutions (G138/G334) after running in a KODAK M6 automatic processor.
Glare or gloss was evaluated after manual processing making use
therefore from a hardener-free developer and a hardener-free fixer the
composition of which has been given hereinafter:
Composition of the hardener-free developer:
-concentrated part : | |
water | 200 ml |
potassium bromide | 12 grams |
potassium sulphite (65% solution) | 249 grams |
ethylenediaminetetraacetic acid, sodium salt, trihydrate | 9.6 grams |
hydroquinone | 106 grams |
5-methylbenzotriazole | 0.076 grams |
1-phenyl-5-mercaptotetrazole | 0.040 grams |
sodiumtetraborate (decahydrate) | 70 grams |
potassium carbonate | 38 grams |
potassium hydroxide | 49 grams |
diethylene glycol | 11 grams |
potassium iodide | 0.088 grams |
4-hydroxymethyl-4-methyl-1phenyl 3-pyrazolidinone | 12 grams |
Water to make 1 liter pH adjusted to 11.15 at 25°C with potassium hydroxide. |
For initiation of the processing one part of the concentrated
developer was mixed with 3 parts of water. No starter was added.
The pH of this mixture was 10.30 at 25°C.
Composition of the hardener-free fixer:
-concentrated part : | |
ammonium thiosulfate (78% solution) | 661 grams |
sodium sulphite | 54 grams |
boric acid | 25 grams |
sodium acetate-trihydrate | 70 grams |
acetic acid | 40 grams |
water to make 1 liter pH adjusted with acetic acid to 5.30 at 25°C |
To make this fixer ready for use one part of this concentrated part
was mixed with 4 parts of water. A pH of 5.25 was measured at 25°C.
Film | F | S | C | x1+x2 +y1+ y2 in g/m2 | y2 g/m2 polymer latex | x2 g/m2 of gelatin | y2/x2 | WSD (M6) | Gloss |
W | 16 | 163 | 2.74 | 1.30 | 0.00 | 0.00 | 2.5 | 3.0 | |
W' | 16 | 165 | 2.61 | 1.51 | 0.60 | 0.20 | 3.00 | 0.5 | 1.0 |
X | 22 | 165 | 2.59 | 1.51 | 0.60 | 0.20 | 3.00 | 0.0 | 1.0 |
Y | 17 | 163 | 2.55 | 1.51 | 0.60 | 0.20 | 3.00 | 0.0 | 1.0 |
Z | 14 | 163 | 2.70 | 1.51 | 0.60 | 0.20 | 3.00 | 1.5 | 1.0 |
Z' | 11 | 161 | 2.74 | 1.51 | 0.60 | 0.20 | 3.00 | 1.0 | 2.0 |
As becomes clear from Table 4 the worse results are obtained in the
absence of an afterlayer, even when a polymer latex is present in the
protective antistress. Once an afterlayer has been coated, the
presence of a polymer latex in an excessive amount versus gelatin
(y2 /x2 =3:1 ) makes water spot defects disappear after processing in
hardener-containing processing solutions and makes glare or gloss
become excellent, after processing in hardener-free processing
solutions.
Having described in detail preferred embodiments of the current
invention, it will now be apparent to those skilled in the art that
numerous modifications can be made therein without departing from
the scope of the invention as defined in the appending claims.
Claims (10)
- A light-sensitive silver halide photographic material comprising a support and on one or both sides thereof at least one light-sensitive silver halide emulsion layer, a gelatinous protective antistress layer and, adjacent thereto as an outermost layer, a gelatinous afterlayer, characterized in that said afterlayer comprises at least one polymer latex, being a polybutylacrylate, a polybutylmethacrylate latex or a polyurethane latex, or a copolymer latex being a copolymer poly(butyl methacrylate) polyacrylamide N-substituted sulfo-isobutyl salt, in a ratio amount by weight of (co)polymer latex to gelatin from 0.2:1 up to 5:1 and a total amount of (co)polymer latex and gelatin of at least 0.10 g/m2.
- Material according to claim 1, wherein said polyurethane latex is an aliphatic anionic polyurethane latex.
- Material according to claim 1, wherein in the poly(butyl methacrylate) polyacrylamide N-substituted sulfo-isobutyl salt copolymer a ratio amount of butylmethacrylate and acrylamide-N-isobutyl-sulphonic acid sodium salt is at least 80:20.
- Material according to any of claims 1 to 3, wherein said protective antistress layer is free from any polymer or copolymer latex.
- Material according to any of claims 1 to 4, wherein said ratio amount by weight of (co)polymer latex to gelatin is from 0.3:1 up to 3:1.
- Material according to claim 1 to 5, wherein a total amount of (co)polymer latex and gelatin is up to the 1.2 g/m2.
- Material according to any of claims 1 to 6, wherein in the protective antistress layer gelatin is present in the range of from 0.20 to 1.0 g per m2 and wherein in the outermost afterlayer gelatin is present in the range of from 0.05 to 0.50 g per m2.
- Material according to any of claims 1 to 6, wherein in the protective antistress gelatin is present in the range of from 0.20 to 1.0 g per m2 and wherein in the outermost afterlayer gelatin is present in the range of from 0.10 to 0.40 g per m2.
- Material according to any of claims 1 to 8, wherein amounts of latex (co)polymer(s) are in the range from 0.05-0.60 g/m2.
- Material according to any of claims 1 to 9, wherein said material is an X-ray material.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP99203063A EP0992845A1 (en) | 1998-10-08 | 1999-09-20 | Light-sensitive silver halide material providing improved surface characteristics after processing |
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP98203412 | 1998-10-08 | ||
EP98203412 | 1998-10-08 | ||
EP99203063A EP0992845A1 (en) | 1998-10-08 | 1999-09-20 | Light-sensitive silver halide material providing improved surface characteristics after processing |
Publications (1)
Publication Number | Publication Date |
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EP0992845A1 true EP0992845A1 (en) | 2000-04-12 |
Family
ID=26150760
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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EP99203063A Withdrawn EP0992845A1 (en) | 1998-10-08 | 1999-09-20 | Light-sensitive silver halide material providing improved surface characteristics after processing |
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Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0307855A2 (en) * | 1987-09-18 | 1989-03-22 | EASTMAN KODAK COMPANY (a New Jersey corporation) | Gelatin-grafted polymer particles |
EP0404091A2 (en) * | 1989-06-20 | 1990-12-27 | Fuji Photo Film Co., Ltd. | Silver halide photographic materials |
US5061595A (en) * | 1990-09-24 | 1991-10-29 | Eastman Kodak Company | Contact film for use in graphic arts with two overcoat layers |
EP0520393A1 (en) * | 1991-06-25 | 1992-12-30 | EASTMAN KODAK COMPANY (a New Jersey corporation) | Photographic element containing stress absorbing protective layer |
EP0751422A1 (en) * | 1995-06-27 | 1997-01-02 | Eastman Kodak Company | Photographic element having improved scratch and abrasion resistance |
EP0886177A1 (en) * | 1997-06-19 | 1998-12-23 | Eastman Kodak Company | Photographic element containing polymeric particles made by a microsuspension process |
-
1999
- 1999-09-20 EP EP99203063A patent/EP0992845A1/en not_active Withdrawn
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0307855A2 (en) * | 1987-09-18 | 1989-03-22 | EASTMAN KODAK COMPANY (a New Jersey corporation) | Gelatin-grafted polymer particles |
EP0404091A2 (en) * | 1989-06-20 | 1990-12-27 | Fuji Photo Film Co., Ltd. | Silver halide photographic materials |
US5061595A (en) * | 1990-09-24 | 1991-10-29 | Eastman Kodak Company | Contact film for use in graphic arts with two overcoat layers |
EP0520393A1 (en) * | 1991-06-25 | 1992-12-30 | EASTMAN KODAK COMPANY (a New Jersey corporation) | Photographic element containing stress absorbing protective layer |
EP0751422A1 (en) * | 1995-06-27 | 1997-01-02 | Eastman Kodak Company | Photographic element having improved scratch and abrasion resistance |
EP0886177A1 (en) * | 1997-06-19 | 1998-12-23 | Eastman Kodak Company | Photographic element containing polymeric particles made by a microsuspension process |
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