EP0184078B1 - Method for etching half-tone silver halide images and silver halide photosensitive material for half-tone image reproduction - Google Patents

Method for etching half-tone silver halide images and silver halide photosensitive material for half-tone image reproduction Download PDF

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Publication number
EP0184078B1
EP0184078B1 EP85114809A EP85114809A EP0184078B1 EP 0184078 B1 EP0184078 B1 EP 0184078B1 EP 85114809 A EP85114809 A EP 85114809A EP 85114809 A EP85114809 A EP 85114809A EP 0184078 B1 EP0184078 B1 EP 0184078B1
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EP
European Patent Office
Prior art keywords
group
silver halide
compounds
silver
dot
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
EP85114809A
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German (de)
English (en)
French (fr)
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EP0184078A2 (en
EP0184078A3 (en
Inventor
Aldo Sgarbi
Alberto Vacca
Paolo Beretta
Jonathan Peter Kitchin
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
3M Co
Original Assignee
Minnesota Mining and Manufacturing Co
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Filing date
Publication date
Application filed by Minnesota Mining and Manufacturing Co filed Critical Minnesota Mining and Manufacturing Co
Publication of EP0184078A2 publication Critical patent/EP0184078A2/en
Publication of EP0184078A3 publication Critical patent/EP0184078A3/en
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Publication of EP0184078B1 publication Critical patent/EP0184078B1/en
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Classifications

    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03C—PHOTOSENSITIVE MATERIALS FOR PHOTOGRAPHIC PURPOSES; PHOTOGRAPHIC PROCESSES, e.g. CINE, X-RAY, COLOUR, STEREO-PHOTOGRAPHIC PROCESSES; AUXILIARY PROCESSES IN PHOTOGRAPHY
    • G03C1/00—Photosensitive materials
    • G03C1/005—Silver halide emulsions; Preparation thereof; Physical treatment thereof; Incorporation of additives therein
    • G03C1/06—Silver halide emulsions; Preparation thereof; Physical treatment thereof; Incorporation of additives therein with non-macromolecular additives
    • G03C1/08—Sensitivity-increasing substances
    • G03C1/09—Noble metals or mercury; Salts or compounds thereof; Sulfur, selenium or tellurium, or compounds thereof, e.g. for chemical sensitising

Definitions

  • the present invention relates to a method for etching half-tone silver halide images and to a silver halide photosensitive material for contact copying of half-tone (dot and line) images.
  • Silver halide photosensitive materials are commonly used in the photo-lithographic industry for making dot or line images, for example for use as color proofing films and contact papers.
  • dot image includes also the meaning of "line image”
  • dot-etching which consists of a treatment with a solution of mild oxidizing agents to partially dissolve the metallic silver of dot or line images.
  • the most commonly used etching solution employs a mixture of a ferricyanide and a thiosulfate and is known as Farmer's solution, but other oxidizing agents, such as permanganates, ceric salts, dichromates, persulfates, etc. may be used.
  • the loss of silver image at the edges of the dots results in a reduction in the dot percentage, that is the percentage of the total area which is covered by the half-tone dots and varies from 0% to 100%.
  • the degree to which the dots can be etched is limited by the loss in density which inevitably occurs at the center of the dots during dot etching. The density of the center of the dots should not fall much below a value of 2, otherwise the quality of copies or printing plates produced from the original deteriorates.
  • the degree to which a film may be usefully etched is also limited by the constraint that during the etching process the small dots, i.e. 10% to 20% dots, should not be completely lost but remain sufficiently large and dense to be copied.
  • the present invention relates to a method of photomechanical dot etching wherein an image-wise exposed silver halide photosensitive material for contact copying of line or dot images is developed in an alkaline developer solution and the silver image is subjected to dot etching by means of a silver halide oxidizing solution, in which the improvement consists of reactively associating a high-chloride fine grain silver halide emulsion with at least one compound selected from the group of thiazolium (including di-thiazolium) salt compounds, thiazole (including di-thiazole) compounds and pyrazole compounds, said compound being used in an amount from 0.01 to 2 grams per mole of silver.
  • high-chloride is intended to refer to a silver halide having at least 80% of its molar halide content in chloride ions.
  • fine grain is intended to refer to silver halide having an average grain size lower than 0.15 pm.
  • the present invention relates to a method as described above, in which the selected compound is associated with the high-chloride fine-grain silver halide emulsion in combination with a mercaptotetrazole compound.
  • the thiazolium (including the di-thiazolium) salt compounds of the method of the present invention may correspond to general formulas I or II: wherein R, represents hydrogen, a mercapto group, an aliphatic group or an aromatic group; Q 1 represents the atoms selected from the group consisting of nitrogen and carbon atoms necessary to complete a simple or fused 5-membered ring; R 2 represents an aliphatic group or an aromatic group, R 3 represents a divalent group and X- represents an anion.
  • the mercapto group represented by R includes an alkylmercapto group, wherein the alkyl substituent preferably comprises 1 to 4 carbon atoms, such as methylmercapto, ethylmercapto, etc.
  • the aliphatic groups represented by R, and R 2 include a straight or branched chain alkyl group, a cycloalkyl group, an alkenyl group, and an alkynyl group.
  • straight or branched chain alkyl groups are alkyl groups having from 1 to 10, and preferably from 1 to 5 carbon atoms.
  • Preferred examples include a methyl group, an ethyl group, a propyl group, a butyl group, etc.
  • the cycloalkyl group has generally from 3 to 10 carbon atoms and preferred examples thereof are a cyclopentyl group, a cyclohexyl an adamantyl group, etc.
  • examples of the alkenyl group include an allyl group, etc.
  • examples of the alkynyl group include a propargyl group, etc.
  • the aliphatic groups represented by R 1 and R 2 may be substituted.
  • examples of the substituents for the aliphatic groups are an alkoxy group (e.g. a methoxy group, an ethoxy group, a propoxy group, a butoxy group, etc.), one or more halogen atoms (e.g. chlorine, bromine, fluorine, iodine, etc.), an alkoxycarbonyl group, an aryl group (e.g. a phenyl group, a halogen-substituted phenyl group, etc.), a hydroxy group, a cyano group, a sulfonyl group, etc.
  • an alkoxy group e.g. a methoxy group, an ethoxy group, a propoxy group, a but
  • Examples of the aromatic groups shown by R 1 and R 2 include a phenyl group, a naphthyl group bearing or not substituents (e.g. an alkyl group, an alkoxy group, a cyano group, a dialkylamino group, an alkoxycarbonyl group, a carboxy group, a nitro group, an alkylthio group, a hydroxy group, a sulfonyl group, a carbamoyl group, a halogen atom, etc., the alkyl groups thereof preferably including 1 to 5 carbon atoms).
  • substituents e.g. an alkyl group, an alkoxy group, a cyano group, a dialkylamino group, an alkoxycarbonyl group, a carboxy group, a nitro group, an alkylthio group, a hydroxy group, a sulfonyl group, a carbamoyl group, a halogen atom, etc.
  • the divalent group represented by R 3 includes any divalent group, but preferably a cyclic hydrocarbon group such as an arylene group having 6 to 12 carbon atoms, e.g. an m-phenylene group, etc., an acryclic hydrocarbon group such as an alkylene group having 1 to 12 carbon atoms, e.g. a methylene group, an ethylene group, a trimethylene group, a decamethylene group, etc.
  • the divalent group represented by R 3 can also be an aralkylene groups having a total of 8 to 10 carbon atoms.
  • One to three of the carbon atoms of the group defined above for R 3 can be replaced by a hetero atom such as a nitrogen atom, a sulfur atom, an oxygen atom, etc.
  • R 3 is a divalent branched or straight chain alkylene group having 1 to 10 carbon atoms.
  • Such chain can be substituted, for example, with one or more of an alkoxy group having 1 to 4 carbon atoms, such as a methoxy group, an ethoxy group, etc., a halogen atom such as a chlorine atom, a bromine atom, etc., a hydrogen atom, an acethoxy group, and the like.
  • an alkoxy group having 1 to 4 carbon atoms such as a methoxy group, an ethoxy group, etc.
  • a halogen atom such as a chlorine atom, a bromine atom, etc.
  • hydrogen atom an acethoxy group, and the like.
  • the simple or fused 5-membered ring, completed by Q 1 in formula (I) above, may be substituted by an alkyl group, such as a methyl group, an ethyl group, etc., an alkoxy group, such as a methoxy group, an ethoxy group, etc., an aryl group, such as a phenyl group, a benzyl group, etc., a halogen atom, such as chlorine, bromine, etc., an alkoxycarbonyl group, a cyano group, an amido group, etc.
  • an alkyl group such as a methyl group, an ethyl group, etc.
  • an alkoxy group such as a methoxy group, an ethoxy group, etc.
  • an aryl group such as a phenyl group, a benzyl group, etc.
  • a halogen atom such as chlorine, bromine, etc.
  • an alkoxycarbonyl group such as
  • the ring fused on the 5-membered ring may be a simple or fused 6-membered ring including or not in its skeleton one or more nitrogen atoms such as, for example, benzene, 11,2-d I or 2,1-d
  • Examples of X- include chlorine, bromine, iodine, nitrate, sulfate, p-toluensulfonate, etc.
  • the thiazole (including the di-thiazole) compounds may correspond to general formula (III) : wherein Q 2 represents the atoms selected from the group consisting of nitrogen and carbon atoms necessary to complete a simple or fused 5-membered ring as described for the 5-membered ring offormula (I) and R 4 represents hydrogen, a mercapto group and an aliphatic or aromatic group as described for R, in formulas (I) and (II).
  • the pyrazole compounds may correspond to general formula (IV): wherein Q 3 represents a simple or fused ring as described for the 5-membered ring of formula (I).
  • the mercaptotetrazole compounds to be combined with the above selected compound in reactive association with the high-chloride fine-grain silver halide emulsion may correspond to general formula (V): wherein R s represents an aliphatic or an aromatic group as described for R, and R 2 in formula (I).
  • the high-chloride fine-grain silver halide emulsions according to the method of the present invention have an average grain size lower than 0.11 um (the term "grain-size", as used herein, refers to the diameter of a circle which has the same area as the average projected area of the silver halide crystals viewed under an electron microscope). Still preferably, the high-chloride fine-grain silver halide emulsions according to the method of the present invention has a silver chloride content higher than 90 percent.
  • the preferred high silver chloride content emulsion is a silver chloro-bromide or a silver chloro- iodo-bromide emulsion.
  • the compounds selected from the group above or their combination with the mercaptotetrazole compounds, according to the method of the present invention are associated with the high-chloride fine-grain silver halide emulsion in quantities ranging from 0.05 to 0.5 gram per mole of silver.
  • the present invention relates to a black and white silver halide photosensitive material, for contact copying of line or dot images, comprising, coated on a support, one or more hydrophilic colloidal layers, at least one of which is a silver halide emulsion layer, wherein the silver halide emulsion has a silver chloride percentage higherthan 80% and an average grain size lower than 0.15 pm reactively associated with a compound selected from the group of thiazolium salt compounds, thiazole compounds and pyrazole compounds.
  • the selected compound is associated with the high-chloride fine-grain silver halide emulsion in combination with a mercaptotetrazole compound.
  • the thiazolium (including the di-thiazolium) salt compounds useful in the silver halide photosensitive material of the present invention correspond to the formulas (I) and (II) described above. Still in general the thiazole (including the di-thiazole) compounds correspond to the formula (III) described above. Still in general, the pyrazole compounds correspond to the general formula (IV) described above. Compounds selected within the formulas above may be combined, to prepare the silver halide photosensitive material of the present invention, with mercaptotetrazole compounds corresponding to the general formula (V) described above.
  • Such compounds, emulsion compositions and grain size are particularly chosen in a way as to reduce more than 10%, preferably at least 12%, of the dot percentage of a 50% dot without thereby causing either the dot percentage of a 10% dot to fall below 3% or the density of a 100% dot to fall below 2.0.
  • the silver chloride content of the silver halide emulsion, the grain-size of the silver halide particles and the nature and amount(s) of the compounds can be properly chosen to obtain the best results.
  • the grain-size has a significant effect to the above purpose.
  • the skilled in the art can arrange the emulsion with proper silver halide content, grain size of silver halide particles and amounts of the selected compounds to best operate the process depending upon his particular needs.
  • a standard half-tone dot test target as described hereinafter in the example, can be used to control the obtained results while changing the indicated parameters.
  • the present invention refers to a dot etched photograph prepared by the dot etching method described above.
  • the term "associated with” is used to mean added to the coating composition including the silver halide emulsion used to form the silver halide emulsion layer, or added to a coating composition, not including the silver halide emulsion, used to form a non light-sensitive layer in a mutual relationship of permeability to water with the silver halide emulsion layer)
  • the compounds of general formulas I, II, III and IV alone or in combination with the compounds of general formula V lead to a significant improvement in the dot etching characteristics of the coated emulsion.
  • the mid-range dot size is highly reduced without losing the small dots and decreasing the density of big dots.
  • organic sulfur compounds act as inhibitors towards the bleaching of the silver image by bleaching solutions, as for example described in Phot. Sci. Eng., 11, (1967), p. 363, in Research Disclosure, 1972, 10233 and in US patent 3,705,803.
  • This effect has been utilized, for example, for the protection of silver optical sound track of movie films while metallic silver is bleached from the color image.
  • this effect is simply an overall inhibition of bleaching and gives no indication that bleaching of small dots (such as 10% dots) is inhibited to a larger extent than bleaching of mid-range dots (such as 50% dots).
  • the silver halide emulsions are preferably of narrow grain-size distribution, but the invention is not limited to such emulsions. As stated before, the invention is restricted to very fine-grain silver halide emulsions, the major halide constituent being chloride and the minor, if present, being either bromide or iodide or both.
  • Emulsions of very fine grain-size, such as the emulsions are often referred to as "Lippmann Emulsions". Methods for the preparation of such emulsions are well-known and are described for example by P. Glafkidés in "Photographic Chemistry", Fountain Press, London, 1958, vol. I, page 365.
  • the silver halide emulsions can optionally be sensitized with gold compounds, such as chloroaurates or gold chloride; salts of noble metals such as rhodium or iridium, sulfur compounds capable of producing silver sulfide by reacting with silver salts; and reducing substances such as stannous salts, amines and formamidine sulfinate.
  • gold compounds such as chloroaurates or gold chloride
  • salts of noble metals such as rhodium or iridium, sulfur compounds capable of producing silver sulfide by reacting with silver salts
  • reducing substances such as stannous salts, amines and formamidine sulfinate.
  • salts of noble metals such as rhodium and iridium may also be present.
  • the binder for the emulsion is preferably gelatin although part or all of this may be substituted by other synthetic or natural polymers as described in Research Disclosure, 1978, 17643, IX, for example, in order to improve the dimensional stability and the physical properties of the coated film.
  • Suitable antifoggants or stabilizers may be added to the coatings as described for example in the Research Disclosure above para. VI.
  • the emulsions may further contain additives, such as wetting agents, hardeners, filtering dyes, plasticizers, lubricants, matting agents, etc., as described in the Research Disclosure above.
  • the photosensitive material may contain light unsensitive layers, such as a surface protective layer, an antihalation layer, an antistatic layer, etc.
  • Said light insensitive layers can contain hydrophilic colloidal binders (e.g. gelatin), surface active agents, antistatic agents, matting agents, slipping agents, gelatin plasticizing agents, a polymer latex and so on.
  • supports preferably used in the photosensitive materials of the present invention include polyester films, such as a polyethylene terephthalate film and cellulose ester films, such as cellulose triacetate film.
  • the present invention does not put any particular restriction on the process for development of the photosensitive material.
  • any developing process comprising the steps of developing, fixing and etching used to process conventional photographic materials for use in the lithographic field can be adopted.
  • Said development process may be performed manually or by using automatic developing machines, at processing temperatures generally in the range from 18 to 50°C, but not excluding temperatures outside that range.
  • the developing solution can contain any known developing agent.
  • developing agents which can be used alone or in mixtures
  • said developing solutions can contain preservatives, alkali agents, buffers, antifoggants, water softeners, hardeners, etc.
  • a developing solution which can also be used in the present invention is the so-called lith developing solution, which comprises a dihydroxybenzene developing agent, an alkali agent, a small amount of free sulfite and a sulfite ion buffer (such as adducts of formalin and sodium bisulfite and of acetone and sodium bisulfite) to control the concentration of free sulfite and so on.
  • lith developing solution which comprises a dihydroxybenzene developing agent, an alkali agent, a small amount of free sulfite and a sulfite ion buffer (such as adducts of formalin and sodium bisulfite and of acetone and sodium bisulfite) to control the concentration of free sulfite and so on.
  • the fixing solution can have any conventionally used composition.
  • fixing agents which can be used include thiosulfates, thiocyanates and organic sulfur compound which are known as fixing agents.
  • the fixing solution can further contain water-soluble aluminium salts as hardeners.
  • the etching solution can have any conventionally used composition and for example the compositions described by C. E. K. Mees in "The Theory Of The Photographic Process", McMillan, 1954, pages 737-744.
  • an etching solution as a reducing component comprising a permanganate, a ferric salt, a persulfate, a cupric salt, a ceric salt, a hexacyanoferrate-(III), or a dichromate, independently or in combination and, optionally, an inorganic acid such as sulfuric acid, and an alcohol; or an etching solution comprising a reducing agent such as a hexacyanoferrate-(111), ethylenediaminotetraacetatoferrate-(III) or the like, and a silver halide solvent such as a thiosulfate, a thiocyanate, thiourea or a derivative thereof and, optionally, an inorganic acid such as sulfuric acid, can be used.
  • etching solutions are Farmer's solution comprising potassium ferricyanide and sodium thiosulfate, an etching solution comprising a persulfate and potassium permanganate, an etching solution comprising a persulfate, an etching solution comprising a ceric salt, and so on.
  • the composition of the etching solution and the processing conditions (temperature, time, etc.) to be used in the present invention There is no particular limitation as regards the composition of the etching solution and the processing conditions (temperature, time, etc.) to be used in the present invention.
  • the etching of the whole surface can be carried out, as normal, by dipping the photosensitive material into the etching solution. Otherwise the etching solution may be applied locally, by using for example a brush, in order to etch a part of the image.
  • a silver halide emulsion containing 98% silver chloride and 2% silver bromide was prepared by adding an aqueous solution of silver nitrate (800 ml 2.5N) and an aqueous solution of mixed halides (17 ml 2.5N potassium bromide and 833 ml 2.5N potassium chloride) to a well-agitated solution of aqueous gelatin at 36°C over a period of 30 minutes by the conventional double-jetting technique.
  • the emulsion was coagulated by reducing the pH to 3.5 and adding sodium sulfate (800 ml 40% w/v). The emulsion was then washed in the conventional way and reconstituted with the addition of extra gelatin to give a final content of 80 g of gelatin per mole of silver.
  • the average grain-size of the emulsion was determined as 0.080 pm by examination under electron microscope.
  • the emulsion was divided into portions which were prepared for coating with the addition of formaldehyde (hardener) and wetting agent. Further additions were made to the individual portions as indicated in Table 1, followed by coating onto polyester base which was backed with a green antihalation layer.
  • the coatings were each conventionally exposed through a standard halftone dot test target made with a Crosfield Laser Scanner Model 640 Magnascan consisting of areas of dots ranging from 0 to 100% in 10% increments.
  • the exposing source was a Philips HPM17 metal halide lamp.
  • the coatings were developed in 3M RDC developer for 20 seconds at 40°C and fixed in 3M "Fixroll" fixer to give halftone images which were exact negative replicas of the test target.
  • the halftone dot images were cut into strips which were dipped into a ferricyanide bleach solution for a series of times from 30 seconds to 6 minutes, followed by rinsing in water.
  • the ferricyanide bleach solution was prepared as follows:
  • Solution A 1 part of Solution A was mixed with 4 parts of Solution B and 27 parts of water. The temperature was maintained at 20°C.
  • the strips were dried and the dot percentages of the bleached images were measured using a densitometer.
  • the maximum etchability of a coating was taken as the reduction in dot percent which can be obtained on a 50% dot before either the measured percentage of a 10% dot falls below 3% or the density of a 100% dot falls below 2.0.
  • the maximum etchability values are shown in Table 1.
  • Table 1 show the effectiveness of the compounds of structures I, II, III and IV in improving the etching characteristics of the coating and the further improvement resulting from the additional presence of a compound of structure V.
  • a series of silver halide emulsions of increasing grain size was prepared.
  • the emulsions were all of 98% silver chloride, 2% silver bromide composition.
  • the grain size of the emulsions was controlled by using the well-known techniques of altering the temperature, addition rates and quantity of silver and halide solutions.
  • Each emulsion was split into two parts one of which was coated without further addition. The other part was added with Compound 1 (0.25 g/mole silver) and Compound 7 (0.07 g/mole silver). All the emulsions were coated and tested as described in Example 1.
  • a series of silver halide emulsions was prepared by varying chlorobromide ratio and using a procedure like that described in Example 1.
  • the emulsions had all a grain size ranging from 0.078 to 0.088 pm.
  • Example 2 The emulsions were coated as said in Example 2 with and without the addition of Compounds 1 and 7. The maximum etchability of these coatings is reported in Table 3.

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  • Physics & Mathematics (AREA)
  • Chemical & Material Sciences (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • General Physics & Mathematics (AREA)
  • Silver Salt Photography Or Processing Solution Therefor (AREA)
  • Non-Silver Salt Photosensitive Materials And Non-Silver Salt Photography (AREA)
EP85114809A 1984-12-06 1985-11-21 Method for etching half-tone silver halide images and silver halide photosensitive material for half-tone image reproduction Expired EP0184078B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT2393884 1984-12-06
IT23938/84A IT1196358B (it) 1984-12-06 1984-12-06 Materiale fotosensibile agli alogenuri d'argento per la riproduzione di immagini a mezza tinta e metodo per l'indebolimento di immagini fotografiche a mezza tinta agli alogenuri d'argento

Publications (3)

Publication Number Publication Date
EP0184078A2 EP0184078A2 (en) 1986-06-11
EP0184078A3 EP0184078A3 (en) 1988-11-17
EP0184078B1 true EP0184078B1 (en) 1991-01-23

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EP85114809A Expired EP0184078B1 (en) 1984-12-06 1985-11-21 Method for etching half-tone silver halide images and silver halide photosensitive material for half-tone image reproduction

Country Status (8)

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EP (1) EP0184078B1 (es)
JP (1) JPH07107599B2 (es)
AR (1) AR241722A1 (es)
AU (1) AU588556B2 (es)
BR (1) BR8506108A (es)
DE (1) DE3581508D1 (es)
IT (1) IT1196358B (es)
MX (1) MX166778B (es)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT1179519B (it) * 1984-12-17 1987-09-16 Minnesota Mining & Mfg Materiale fotosensibile agli alogenuri d'argento per l'ottenimento di immagini in bianco e nero a mezza tinta e metodo per la riproduzione a mezza tinta ad alto contrasto
US4863844A (en) * 1986-11-22 1989-09-05 Konica Corporation Gold and sulfur sensitized silver halide light-sensitive photographic material
JP2668223B2 (ja) * 1986-11-22 1997-10-27 コニカ株式会社 迅速処理性に優れ、かつ露光時の温度変化に対し感度および階調変動の少ないハロゲン化銀写真感光材料
JPH0797201B2 (ja) * 1987-05-11 1995-10-18 コニカ株式会社 減力性が改良されたハロゲン化銀写真感光材料とその減力処理方法
JPH0743518B2 (ja) * 1987-07-06 1995-05-15 コニカ株式会社 ハロゲン化銀写真乳剤
JP2627149B2 (ja) * 1987-07-08 1997-07-02 コニカ株式会社 返し特性の改良された画像形成方法

Family Cites Families (6)

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Publication number Priority date Publication date Assignee Title
JPS57132137A (en) * 1981-02-10 1982-08-16 Konishiroku Photo Ind Co Ltd Silver halide emulsion
JPS5834443A (ja) * 1981-08-26 1983-02-28 Fuji Photo Film Co Ltd 製版用ハロゲン化銀写真感光材料及びその減力処理方法
JPS59159154A (ja) * 1983-02-28 1984-09-08 Mitsubishi Paper Mills Ltd ハロゲン化銀写真乳剤
JPS59157630A (ja) * 1983-02-25 1984-09-07 Mitsubishi Paper Mills Ltd ハロゲン化銀写真乳剤
JPS59157631A (ja) * 1983-02-25 1984-09-07 Mitsubishi Paper Mills Ltd ハロゲン化銀写真乳剤
JPS59193447A (ja) * 1983-04-18 1984-11-02 Fuji Photo Film Co Ltd 明室用ハロゲン化銀写真感光材料

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IT8423938A0 (it) 1984-12-06
BR8506108A (pt) 1986-08-19
JPS61179433A (ja) 1986-08-12
MX166778B (es) 1993-02-04
AU588556B2 (en) 1989-09-21
JPH07107599B2 (ja) 1995-11-15
DE3581508D1 (de) 1991-02-28
AU5079485A (en) 1986-06-12
AR241722A1 (es) 1992-11-30
EP0184078A2 (en) 1986-06-11
IT1196358B (it) 1988-11-16
EP0184078A3 (en) 1988-11-17

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