US3770448A - Lightsensitive photographic material - Google Patents

Lightsensitive photographic material Download PDF

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Publication number
US3770448A
US3770448A US00137604A US3770448DA US3770448A US 3770448 A US3770448 A US 3770448A US 00137604 A US00137604 A US 00137604A US 3770448D A US3770448D A US 3770448DA US 3770448 A US3770448 A US 3770448A
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United States
Prior art keywords
silver
lightsensitive
compound
silver salt
salt
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Expired - Lifetime
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US00137604A
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English (en)
Inventor
A Poot
F Heugebaert
E Brinckman
A Kunig
H Kampfer
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Agfa Gevaert AG
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Agfa Gevaert AG
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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
    • G03C1/494—Silver salt compositions other than silver halide emulsions; Photothermographic systems ; Thermographic systems using noble metal compounds
    • G03C1/498—Photothermographic systems, e.g. dry silver
    • G03C1/49827—Reducing agents

Definitions

  • This invention relates to a single-layer or multi-layer lightsensitive recording material containing an oxidising agent, a reducing agent and a lightsensitive compound whose photolytic products initiate a redox reaction between the oxidising agent and reducing agent on subsequent heating.
  • a photographic material which contains an oxidising agent, a reducing agent and a relatively small quantity of a lightsensitive substance whose photolytic products found at the light-struck areas initiate a redox reaction.
  • Organic silver salts are used as the oxidising agents and aminophenols, hydroxylamines, pyrazolidones or phenols as the reducing agent.
  • Suitable lightsensitive
  • the compounds include heavy metal salts which, on exposure, form nuclei of the free metal. More particularly, the lightsensitive compounds are light-sensitive silver salts, for example silver halides, which on exposure undergo photolysis to form silver. The redox reaction is initiated by these photolytic heavy metal nuclei.
  • a photographic recording material for, the production of dry copies which contains a silver salt that is substantially non-sensitive to light as oxidising agent, a reducing agent and a lightsensitive heavy metal compound which on exposure photolytically forms metal nuclei through which a redox reaction is initiated under the effect of heat, the reducing agent used being a compound of the pyrazolin-S-one series which is able to reduce the non-lightsensitive silver salt at a temperature of from 60 to 160 C. in the presence of photolytically formedheavy-metal nuclei.
  • Particularly suitable reducing agents include pyrazolin-5-one compounds ofthe kind which contain at least one hydrogen atom or a 4-aminophenylamino group in the 4-position of the pyrazoline ring. It is preferred to use pyrazoline derivatives of the following formula B4 TIT-31 in which R represents (1) hydrogen, (2) a saturated or olefinically unsaturated aliphatic group having up to 18 C- atoms, preferably up to five C-atoms, which can optionally be substituted, for example by phenyl, as in the ably up to five C-atoms, by halogen such as fluorine,
  • R represents (1 hydrogen, (2) a saturated or olefinically unsaturated aliphatic group having up to 18 carbon atoms, in which case the aliphatic group can contain further substituents, for example phenyl, as in the case of a benzyl or phenylethyl group, halogen such as fluorine, alkoxycarbonyl, hydroxyl or alkoxy, (3) aryl, especially a group of the phenyl series in which case the aryl ring can be substituted, for example by alkyl or alkoxy with preferably up-to five C-atoms', by halogen such as chlorine or bromine, by hydroxyl, by nitro or by acyl, (4) a heterocyclic group, especially a ring of the pyridine, furan or thiophene, series, (5) a cycloalkyl group, such as cyclohexyl or cyclopentyl, (6) an alkoxycarbonyl group with up to l
  • R represents (1) hydrogen, (2) a saturated or olefin ically unsaturated aliphatic group having up to 18 C- atoms, preferably with up to five C-atoms, which can be substituted, for example by phenyl as in the case of benzyl or phenylethyl groups, with halogen such as chlorine or bromine, by nitrile, by alkoxy, by amino groups which in turn can be substituted, for example by alkyl, phenyl, substituted phenyl for example dialkylaminophenyl or sulfophenyl, by carbamoyl, alkoxycarbonyl, piperidyl or the like, (3) aryl, especially a group of the phenyl series which can in turn be substituted,
  • alkyl or alkoxy with preferably up to five C-atoms for example by alkyl or alkoxy with preferably up to five C-atoms, (4) amino, which can be substituted for example by acyl, especially those of aliphatic carboxylic acids with up to 18 C-atoms or benzoyl, (5) alkoxy with preferably up to five C-atoms like the aforementioned aliphatic group, and which can contain further substituents, (6) halogen, for example, chlorine or bromine, (7) cycloalkyl such as cyclopentyl, or (8) carbamoyl, and when R represents hydrogen R can also represent an alkylene chain between two pyrazolone rings of the above formula; and
  • pyrazolin-5-one derivatives used in accordance with the present invention can be obtained by known methods. Suitable methods are described, for example, in the monograph by RH. Wiley and P. Wiley Pyrazolones, pyrazolidones and Derivatives 1964) (Interscience Publishers, New York) and in German Pat. specification No. 1,155,675.
  • suitable oxidising agents for the image-producing redox system include silver salts of organic acids which show little or no lightsensitivity under the conditions of the process.
  • silver sacchan'de silver 5- chlorosalicylaldoxime, silver 5-nitrosalicylaldoxime or preferably a silver salt of a long-chain fatty acid with up to about 30 C-atoms, for example silver stearate, silver palmitate or silver behenate, or the silver salts of aliphatic carboxylic acidscontaining a-thioether group described in US. Pat. No. 3,330,663.
  • non-lightsensitive silver salt used as oxidising agent and the pyrazolin-5-one used as reducing agent are generally employed in a molar ratio of from 1:1, to
  • Inorganic or organic salts of silver, mercury or gold are examples of suitable lightsensitive heavy metal salts which on exposure form metal nuclei able to initiate the image-producing redox reaction.
  • Heavy metals of Sub-Group lb of the Periodic System of elements, especially silver salts, are preferred. Of these silver salts, silver halides'are especially suitable.
  • the light sensitive heavy metal salt most suitable for the particular redox system employed can be found by a few laborating tests.
  • an aqueous suspension of the metal salt can be mixed with the components of the redox system, in which case no changes should occur in darkness. If this mixture is exposed to UV-radiation, it should become colored relatively quickly. If this is observed, the. heavy metal salt is suitable for use with the'redox system.
  • the lightsensitive heavy metal salt is preferably used in relatively small quantities of from about 0.05 to 0.2 percent by weight, based on the weight of the oxidising agent. This proportion of photosensitive salt is sufficient for mostsystems. In exceptional instances, this percentage can of course be increased or reduced.
  • the lightsensitive heavy metal salt for example the silver halide
  • the lightsensitive heavy metal salt should be present in such small quantities that the photolytically formed heavy metal nuclei can initiate the redox reaction, although the concentration of the silver halide should be so low that the metal nuclei formed cause little or no discoloration of the photographic material.
  • the silver halide can be added to the casting solution for the layer containing the components for the redox reaction or alternatively can be prepared in situ in the casting solution, i.e., by precipitating the silver halide in the mixture.
  • the silver ions for the precipitated silver halide can be provided substantially by the nonlight-sensitive silver salt.
  • the non-lightsensitive silver salts present as oxidising agents can be prepared in known manner by precipitating silver salt solutions, for
  • the silver halides can be produced from the nonlight-sensitive silver salts in various different ways.
  • the surface of the non-lightsensitive silver salts can be treated with vapours of hydrohalic acids, for example hydrochloric acid, hydrobromic acid or hydriodic acid.
  • the quantity of silver halide formed at the surface can be kept within the required limits by adjusting the concentration of-the hydrogen halide in the vapour phase, and the treatment time.
  • the non-lightsensitive silver salts of the organic acids can, of course, also be treated with a solution containing halogen ions, such as chloride ions, bromide ions or iodide ions.
  • halogen ions such as chloride ions, bromide ions or iodide ions.
  • the halogen ions can be provided by the hydrohalic acids themselves or by their salts, especially their ammonium 'or alkali metal salts.
  • non-lightsensitive silver salts are reacted with the compounds yielding halogen ions preferably in the form of their suspensions in a volatile non-aqueous liquid. It is also possible, however, to react the dry salts with hydrohalic acid vapours for example.
  • hydrohalic acids and their salts for example the already mentioned alkali metal salts and ammonium salts, alkaline earth metal salts or other metal salts, for example zinc salts and mercury salts
  • ionisable organic halogen compounds for example triphenylinethyl chloride, triphenylmethyl bromide, 2-bromo-2-methylpropane, Z-bromobutyric acid, 2-bromoethanol or benzophenone dichloride.
  • Formation of the lightsensitive silver halides from the non-lightsensitive silver salts of the organic acids is preferredfor the production of the materials according to the present invention. This enhances the ability of the silverhalides to form, on photolysis, silver nuclei which are particularly active in initiating the redox reaction.
  • binders include organic polymers, such as copolymers of vinyl chloride and vinyl acetate or of butadiene and styrene, polyethylene, polyamides, polyisobutylene, polyvinyl chloride, polyvinylidene chloride, polyvinyl pyrrolidone, polystyrene, chlorinated rubber, polyvinyl butyral, polymers or acrylic acid or methacrylic acid esters or copolymers of derivatives of acrylic acid and methacrylic acid, and cellulose derivatives such as nitrocellulose, cellulose acetate, cellulose propionates or mixtures thereof such as cellulose acetobutyrates.
  • organic polymers such as copolymers of vinyl chloride and vinyl acetate or of butadiene and styrene, polyethylene, polyamides, polyisobutylene, polyvinyl chloride, polyvinylidene chloride, polyvinyl pyrrolidone, polystyrene, chlorinated rubber
  • the lightsensitive layer can be a selfsupporting layer, it is preferably applied to a suitable layer support.
  • the layer support must be stable at the processing temperature of from 60 to 200 C.
  • suitable supports include sheets or films of paper, cellulose acetate, polyethylene terephthalate, textile fabrics, metal foils or glass. 1n the case of paper supports, they can comprise the usual auxiliary layers such as baryta layers, polyethylene layers, etc.
  • the concentration of the reducing agent and of the oxidising agent in the layer can be varied within wide limits.
  • weight ratios between the components of the redox system and the binder of from 4:1 4to about 1:1 have provded to be adequate.
  • the thickness of the lightsensitive layer can also be adapted to suit the requirements of the particular reproduction process. In general, layer thicknesses of from S to 100 microns are sufficient for normal requirements.
  • the layer supports preferably have the usual thickness of from about 0.1 to 0.8 mm.
  • the lightsensitive layers can also be optically sensitised by the addition of dyes.
  • Preferred sensitisers include those compounds of the kind that are also normally used for optically sensitising conventional silver halide emulsion layers, i.e., cyanine dyes, merocyanines, oxonoles or thiocyanines of various kinds, for example those described in the book by EM. Hamer entitled The Cyanine Dyes and Related Compounds, 1964.
  • the usual white pigments for example silicon dioxide, and toners such as for example phthalazone, phthalazone derivatives, or phthalimide, can be added to the photosensitive layers.
  • the photographic materials according to the invention can be processed in known manner.
  • Image-wise exposure is carried out with the light sources commonly used in the photographic art, for example. mercury lamps, quartz-iodine lamps or ordinary incandescent lamps.
  • the type of light source used will depend upon the spectral sensitivity of the heavy metal salt used. When silver halides are used, as is preferably the case, ordinary incandescent lamps are sufficient.
  • the exposure time amounts to a few seconds.
  • the exposed material is then uniformly heated at a temperature of from about 60 to 160 C.
  • the time and the temperature required for heat treatment will be governed by the type of redox system used. Times of from 3 to 80 seconds are generally sufficient. As a rule, a dark brown to black image is obtained and can be immediately used.
  • EXAMPLE 1 Lightsensitive material An equimolar mixture of silver behenate and behenic acid is prepared by precipitating silver nitrate with a solution of sodium behenate and behenic acid in alcohol and water. The precipitate is carefully washed and dried.
  • the suspension for the preparation of the layer is prepared by treating'the mixture indicated below for 12 hours in a ball mill:
  • the above mixture is applied to a paper support in a concentration of 100 g/m and dried at room temperature.
  • the lightsensitive layer is exposed through a transparent original.
  • a 750 watt UV-lamp is used as the light source.
  • the exposure time is 2 seconds, the distance from the light source 5 cm. This is followed by heating for 5 seconds at a temperature of C.
  • the application is such that the applied layer contains from 0.3 to 0.4 g/m of silver in the form of the silver salt.
  • the top casting is then applied to the dried sub-casting.
  • the reducing agent is applied in a quantity of from 0.5 to 1.5 g/m.
  • the reducing agents can be added to the sublayer suspension and ground with this suspension in a ball mill for about 30 minutes, for example:
  • the lightsensitive material is exposed for 3 to 30 seconds with tungsten lamps, depending upon their intensity and upon the required gradation, and developed by heating.
  • the developing time ranges from 3 to 80 seconds depending upon the temperature, which can be in the range from 60 to 160 C. and the apparatus used.
  • Suitable developing apparatus include heatable presses, drying cylinders, rollers, the apparatus described in Belgian Pat. No. 628,174 and in French Pat. Nos. 1,512,332; 1,416,752 or 1,419,101, and conventional commercial apparatus.
  • the layer side of the material can be developed under heat in contact with a polyester film.
  • Brown, brown-black to neutral-black images on a white to yellow background are obtained upon heating depending upon the reducing substance used and the processing conditions.
  • a photographic composition containing in layer form a substantially non-lightsensitive silver salt as an oxidizing agent and a reducing agent in a combination substantially latent under ambient conditions and a light-sensitive heavy metal compound which photolytically forms metal nuclei that upon heating of the composition initiate into reaction the oxidizing agent and the reducing agent to produce a visible change
  • the improvement comprises the reducing agent is a pyrazolin-S-one of the following formula:
  • R represents hydrogen, a saturated or olefinically unsaturated aliphatic group having up to 18 carbons, aryl, a heterocyclic group or cycloalkyl;
  • R represents hydrogenQa saturated or olefinically unsaturated aliphatic group having up to 18 carbons, aryl, a heterocyclic group, an amino group, cycloalkyl, alkoxycarbonyl having up to 18 C- atoms, hydroxyl, a carbamic acid ester group or a carbamoyl group;
  • R represents hydrogen, a saturated or olefinically unsaturated aliphatic group having up to 18 carbons, aryl, alkoxy, halogen, cycloalkyl, or carbamoyl;
  • R represents hydrogen or a 4-aminophenylamino group; and R and R together can represent the ring members required to complete a fiveor sixmembered ring.
  • composition of claim 1, wherein the photosensitive heavy metal salt is a silver halide.
  • composition of claim 3 wherein the heavy metal salt is present in a quantity of from 0.05 to 0.2 percent by weight, based on the weight of the nonlightsensitive silver salt.
  • composition of claim 1, wherein the non-lightsensitive silver salt is a silver salt of along-chain fatty acid.
  • composition of claim 1, wherein the non-lightsensitive silver salt is silver behenate.
  • composition of claim 1 wherein the non-lightsensitive silver salt is a silver salt of an aliphatic carboxylic acid substituted by a thioether group.
  • composition of claim 1 in which the silver halide compound is a silver salt formed in situ.
  • composition of claim 1 in which the silver halide compound is a silver salt formed on the surface of the non-lightsensitive silver compound.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Non-Silver Salt Photosensitive Materials And Non-Silver Salt Photography (AREA)
US00137604A 1970-04-29 1971-04-26 Lightsensitive photographic material Expired - Lifetime US3770448A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE2020939A DE2020939C3 (de) 1970-04-29 1970-04-29 Photographisches Aufzeichnungsmaterial

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US3770448A true US3770448A (en) 1973-11-06

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US00137604A Expired - Lifetime US3770448A (en) 1970-04-29 1971-04-26 Lightsensitive photographic material

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US (1) US3770448A (de)
JP (1) JPS5347688B1 (de)
BE (1) BE765923A (de)
CA (1) CA981514A (de)
CH (1) CH554002A (de)
DE (1) DE2020939C3 (de)
FR (1) FR2090961A5 (de)
GB (1) GB1324284A (de)

Cited By (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3870523A (en) * 1973-01-17 1975-03-11 Fuji Photo Film Co Ltd Heat developable photographic material containing azo dyes as sensitizers
US3909271A (en) * 1973-01-31 1975-09-30 Fuji Photo Film Co Ltd Heat developable photographic material containing sensitizers
US3933507A (en) * 1971-08-12 1976-01-20 Agfa-Gevaert, A.G. Photographic light-sensitive and heat developable material
US4157289A (en) * 1977-05-06 1979-06-05 Fuji Photo Film Co., Ltd. Process for preparing slightly soluble silver salt grains
US4212937A (en) * 1977-12-23 1980-07-15 Asahi Kasei Kogyo Kabushiki Kaisha Heat developable photosensitive materials
US4268626A (en) * 1978-08-28 1981-05-19 Asahi Kasei Kogyo Kabushiki Kaisha Dry image forming material
US5409798A (en) * 1991-08-30 1995-04-25 Canon Kabushiki Kaisha Plate blank, process for producing printing plate from plate blank, and printing method and apparatus using plate
US5552409A (en) * 1990-09-21 1996-09-03 Rohm And Haas Company Dihydropyridazinones, pyridazinones and related compounds as fungicides
US5599648A (en) * 1990-08-03 1997-02-04 Canon Kabushiki Kaisha Surface reforming method, process for production of printing plate, printing plate and printing process
US5631254A (en) * 1990-09-21 1997-05-20 Rohm And Haas Company Dihydropyridazinones, pyridazinones and related compounds as fungicides
EP0802178A2 (de) 1996-02-23 1997-10-22 Fuji Photo Film Co., Ltd. Komplexe von Schiffschen Basen von Chinonen und optische Aufzeichnungsmaterialien, die sie enthalten
FR2869905A1 (fr) * 2004-05-10 2005-11-11 Sanofi Synthelabo Procede de preparation d'ester de l'acide 1,5-diphenylpyrazole carboxylique.
US20060014111A1 (en) * 2004-07-15 2006-01-19 Konica Minolta Medical & Graphic, Inc. Method of forming an image
US20060088785A1 (en) * 2004-10-22 2006-04-27 Konica Minolta Medical & Graphic, Inc. Silver salt photothermographic dry imaging material, thermal development method of the same, and thermal development apparatus for the same
WO2007010777A1 (ja) 2005-07-20 2007-01-25 Konica Minolta Medical & Graphic, Inc. 画像形成方法
EP1953592A1 (de) 2007-02-02 2008-08-06 Konica Minolta Medical & Graphic, Inc. Photothermographisches Material

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5129819B2 (de) * 1972-03-27 1976-08-27
EP0227141A1 (de) * 1985-11-26 1987-07-01 Agfa-Gevaert N.V. Verfahren zur Herstellung eines photothermographischen Materials

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US26719A (en) * 1860-01-03 Medicated pad
US3149990A (en) * 1962-01-19 1964-09-22 Minnesota Mining & Mfg Heat-sensitive copy-sheet
US3457075A (en) * 1964-04-27 1969-07-22 Minnesota Mining & Mfg Sensitized sheet containing an organic silver salt,a reducing agent and a catalytic proportion of silver halide
US3531286A (en) * 1966-10-31 1970-09-29 Minnesota Mining & Mfg Light-sensitive,heat developable copy-sheets for producing color images

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US26719A (en) * 1860-01-03 Medicated pad
US3149990A (en) * 1962-01-19 1964-09-22 Minnesota Mining & Mfg Heat-sensitive copy-sheet
US3457075A (en) * 1964-04-27 1969-07-22 Minnesota Mining & Mfg Sensitized sheet containing an organic silver salt,a reducing agent and a catalytic proportion of silver halide
US3531286A (en) * 1966-10-31 1970-09-29 Minnesota Mining & Mfg Light-sensitive,heat developable copy-sheets for producing color images

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
Handbook of Photography, ed. by Henney et al., 1939, ed. pp. 329 333. *

Cited By (24)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3933507A (en) * 1971-08-12 1976-01-20 Agfa-Gevaert, A.G. Photographic light-sensitive and heat developable material
US3870523A (en) * 1973-01-17 1975-03-11 Fuji Photo Film Co Ltd Heat developable photographic material containing azo dyes as sensitizers
US3909271A (en) * 1973-01-31 1975-09-30 Fuji Photo Film Co Ltd Heat developable photographic material containing sensitizers
US4157289A (en) * 1977-05-06 1979-06-05 Fuji Photo Film Co., Ltd. Process for preparing slightly soluble silver salt grains
US4212937A (en) * 1977-12-23 1980-07-15 Asahi Kasei Kogyo Kabushiki Kaisha Heat developable photosensitive materials
US4268626A (en) * 1978-08-28 1981-05-19 Asahi Kasei Kogyo Kabushiki Kaisha Dry image forming material
US5599648A (en) * 1990-08-03 1997-02-04 Canon Kabushiki Kaisha Surface reforming method, process for production of printing plate, printing plate and printing process
US5728698A (en) * 1990-09-21 1998-03-17 Rohm And Haas Company Dihydropyridazinones, pyridazinones and related compounds as fungicides
US5552409A (en) * 1990-09-21 1996-09-03 Rohm And Haas Company Dihydropyridazinones, pyridazinones and related compounds as fungicides
US5631254A (en) * 1990-09-21 1997-05-20 Rohm And Haas Company Dihydropyridazinones, pyridazinones and related compounds as fungicides
US5753642A (en) * 1990-09-21 1998-05-19 Rohm And Haas Company Dihydropyridazinones, pyridazinones and related compounds as fungicides
US5726176A (en) * 1990-09-21 1998-03-10 Rohm And Haas Company Dihydropyridazinones, pyridazinones and related compounds as fungicides
US5726162A (en) * 1990-09-21 1998-03-10 Rohm And Haas Company Dihydropyridazinones, pyridazinones and related compounds as fungicides
US5728715A (en) * 1990-09-21 1998-03-17 Rohm And Haas Company Dihydropyridazinones, pyridazinones and related compounds as fungicides
US5728694A (en) * 1990-09-21 1998-03-17 Rohm And Haas Company Dihydropyridazinones, pyridazinones and related compounds as fungicides
US5409798A (en) * 1991-08-30 1995-04-25 Canon Kabushiki Kaisha Plate blank, process for producing printing plate from plate blank, and printing method and apparatus using plate
EP0802178A2 (de) 1996-02-23 1997-10-22 Fuji Photo Film Co., Ltd. Komplexe von Schiffschen Basen von Chinonen und optische Aufzeichnungsmaterialien, die sie enthalten
FR2869905A1 (fr) * 2004-05-10 2005-11-11 Sanofi Synthelabo Procede de preparation d'ester de l'acide 1,5-diphenylpyrazole carboxylique.
US20060014111A1 (en) * 2004-07-15 2006-01-19 Konica Minolta Medical & Graphic, Inc. Method of forming an image
US7267934B2 (en) 2004-07-15 2007-09-11 Konica Minolta Medical & Graphic, Inc. Method of forming an image
US20060088785A1 (en) * 2004-10-22 2006-04-27 Konica Minolta Medical & Graphic, Inc. Silver salt photothermographic dry imaging material, thermal development method of the same, and thermal development apparatus for the same
US7220536B2 (en) 2004-10-22 2007-05-22 Konica Minolta Medical & Graphic, Inc. Silver salt photothermographic dry imaging material, thermal development method of the same, and thermal development apparatus for the same
WO2007010777A1 (ja) 2005-07-20 2007-01-25 Konica Minolta Medical & Graphic, Inc. 画像形成方法
EP1953592A1 (de) 2007-02-02 2008-08-06 Konica Minolta Medical & Graphic, Inc. Photothermographisches Material

Also Published As

Publication number Publication date
DE2020939C3 (de) 1978-11-02
BE765923A (nl) 1971-10-19
FR2090961A5 (de) 1972-01-14
DE2020939B2 (de) 1978-03-09
DE2020939A1 (de) 1972-02-24
GB1324284A (en) 1973-07-25
JPS5347688B1 (de) 1978-12-22
CH554002A (de) 1974-09-13
CA981514A (en) 1976-01-13

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