CH336257A - Method of bleach-fixing photographic images - Google Patents
Method of bleach-fixing photographic imagesInfo
- Publication number
- CH336257A CH336257A CH336257DA CH336257A CH 336257 A CH336257 A CH 336257A CH 336257D A CH336257D A CH 336257DA CH 336257 A CH336257 A CH 336257A
- Authority
- CH
- Switzerland
- Prior art keywords
- sep
- bleach
- fixing
- photographic images
- acid
- Prior art date
Links
- 238000000034 method Methods 0.000 title claims description 11
- 150000002894 organic compounds Chemical class 0.000 claims description 6
- 239000000463 material Substances 0.000 claims description 4
- 239000007844 bleaching agent Substances 0.000 claims description 3
- GEHJYWRUCIMESM-UHFFFAOYSA-L sodium sulfite Chemical compound [Na+].[Na+].[O-]S([O-])=O GEHJYWRUCIMESM-UHFFFAOYSA-L 0.000 description 8
- UMGDCJDMYOKAJW-UHFFFAOYSA-N thiourea Chemical compound NC(N)=S UMGDCJDMYOKAJW-UHFFFAOYSA-N 0.000 description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 6
- 239000000126 substance Substances 0.000 description 5
- ROSDSFDQCJNGOL-UHFFFAOYSA-N Dimethylamine Chemical compound CNC ROSDSFDQCJNGOL-UHFFFAOYSA-N 0.000 description 4
- 235000010265 sodium sulphite Nutrition 0.000 description 4
- KCXVZYZYPLLWCC-UHFFFAOYSA-N EDTA Chemical compound OC(=O)CN(CC(O)=O)CCN(CC(O)=O)CC(O)=O KCXVZYZYPLLWCC-UHFFFAOYSA-N 0.000 description 3
- 229910021578 Iron(III) chloride Inorganic materials 0.000 description 3
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 3
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 description 3
- 239000004133 Sodium thiosulphate Substances 0.000 description 3
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Natural products NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 description 3
- 229960001484 edetic acid Drugs 0.000 description 3
- RBTARNINKXHZNM-UHFFFAOYSA-K iron trichloride Chemical compound Cl[Fe](Cl)Cl RBTARNINKXHZNM-UHFFFAOYSA-K 0.000 description 3
- 229910052709 silver Inorganic materials 0.000 description 3
- 239000004332 silver Substances 0.000 description 3
- AKHNMLFCWUSKQB-UHFFFAOYSA-L sodium thiosulfate Chemical compound [Na+].[Na+].[O-]S([O-])(=O)=S AKHNMLFCWUSKQB-UHFFFAOYSA-L 0.000 description 3
- 235000019345 sodium thiosulphate Nutrition 0.000 description 3
- ORGWCTHQVYSUNL-UHFFFAOYSA-N 1,3-bis(hydroxymethyl)thiourea Chemical compound OCNC(=S)NCO ORGWCTHQVYSUNL-UHFFFAOYSA-N 0.000 description 2
- RVBUGGBMJDPOST-UHFFFAOYSA-N 2-thiobarbituric acid Chemical compound O=C1CC(=O)NC(=S)N1 RVBUGGBMJDPOST-UHFFFAOYSA-N 0.000 description 2
- PAYRUJLWNCNPSJ-UHFFFAOYSA-N Aniline Chemical compound NC1=CC=CC=C1 PAYRUJLWNCNPSJ-UHFFFAOYSA-N 0.000 description 2
- IAYPIBMASNFSPL-UHFFFAOYSA-N Ethylene oxide Chemical compound C1CO1 IAYPIBMASNFSPL-UHFFFAOYSA-N 0.000 description 2
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- VLCDUOXHFNUCKK-UHFFFAOYSA-N N,N'-Dimethylthiourea Chemical compound CNC(=S)NC VLCDUOXHFNUCKK-UHFFFAOYSA-N 0.000 description 2
- ZLMJMSJWJFRBEC-UHFFFAOYSA-N Potassium Chemical compound [K] ZLMJMSJWJFRBEC-UHFFFAOYSA-N 0.000 description 2
- 150000003863 ammonium salts Chemical class 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
- HUMNYLRZRPPJDN-UHFFFAOYSA-N benzaldehyde Chemical compound O=CC1=CC=CC=C1 HUMNYLRZRPPJDN-UHFFFAOYSA-N 0.000 description 2
- 239000012084 conversion product Substances 0.000 description 2
- 229910052700 potassium Inorganic materials 0.000 description 2
- 239000011591 potassium Substances 0.000 description 2
- 150000003839 salts Chemical class 0.000 description 2
- 229910052708 sodium Inorganic materials 0.000 description 2
- 239000011734 sodium Substances 0.000 description 2
- JAEZSIYNWDWMMN-UHFFFAOYSA-N 1,1,3-trimethylthiourea Chemical compound CNC(=S)N(C)C JAEZSIYNWDWMMN-UHFFFAOYSA-N 0.000 description 1
- MOKGHQUWPQTSDM-UHFFFAOYSA-N 1-methyl-2-sulfanylideneimidazolidin-4-one Chemical compound CN1CC(=O)NC1=S MOKGHQUWPQTSDM-UHFFFAOYSA-N 0.000 description 1
- OIWIYLWZIIJNHU-UHFFFAOYSA-N 1-sulfanylpyrazole Chemical class SN1C=CC=N1 OIWIYLWZIIJNHU-UHFFFAOYSA-N 0.000 description 1
- LMSDCGXQALIMLM-UHFFFAOYSA-N 2-[2-[bis(carboxymethyl)amino]ethyl-(carboxymethyl)amino]acetic acid;iron Chemical compound [Fe].OC(=O)CN(CC(O)=O)CCN(CC(O)=O)CC(O)=O LMSDCGXQALIMLM-UHFFFAOYSA-N 0.000 description 1
- -1 Cyclic thiourea derivatives Chemical class 0.000 description 1
- FULZLIGZKMKICU-UHFFFAOYSA-N N-phenylthiourea Chemical compound NC(=S)NC1=CC=CC=C1 FULZLIGZKMKICU-UHFFFAOYSA-N 0.000 description 1
- PMZURENOXWZQFD-UHFFFAOYSA-L Sodium Sulfate Chemical compound [Na+].[Na+].[O-]S([O-])(=O)=O PMZURENOXWZQFD-UHFFFAOYSA-L 0.000 description 1
- FZWLAAWBMGSTSO-UHFFFAOYSA-N Thiazole Chemical compound C1=CSC=N1 FZWLAAWBMGSTSO-UHFFFAOYSA-N 0.000 description 1
- GTERUJGHPGERAF-UHFFFAOYSA-N [Fe].C=C Chemical group [Fe].C=C GTERUJGHPGERAF-UHFFFAOYSA-N 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 125000000217 alkyl group Chemical group 0.000 description 1
- 125000003710 aryl alkyl group Chemical group 0.000 description 1
- 125000003118 aryl group Chemical group 0.000 description 1
- LNURKHYFSDRSBI-UHFFFAOYSA-N bis(3-amino-4,5-dimethylphenyl)methanethione Chemical compound NC1=C(C)C(C)=CC(C(=S)C=2C=C(N)C(C)=C(C)C=2)=C1 LNURKHYFSDRSBI-UHFFFAOYSA-N 0.000 description 1
- 238000004061 bleaching Methods 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- ZBCBWPMODOFKDW-UHFFFAOYSA-N diethanolamine Chemical class OCCNCCO ZBCBWPMODOFKDW-UHFFFAOYSA-N 0.000 description 1
- 229910052736 halogen Inorganic materials 0.000 description 1
- 150000002367 halogens Chemical class 0.000 description 1
- 125000000623 heterocyclic group Chemical group 0.000 description 1
- BRWIZMBXBAOCCF-UHFFFAOYSA-N hydrazinecarbothioamide Chemical compound NNC(N)=S BRWIZMBXBAOCCF-UHFFFAOYSA-N 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- GJHHTDAIMPUSJU-UHFFFAOYSA-N n-(acetylcarbamothioyl)acetamide Chemical compound CC(=O)NC(=S)NC(C)=O GJHHTDAIMPUSJU-UHFFFAOYSA-N 0.000 description 1
- MGFYIUFZLHCRTH-UHFFFAOYSA-N nitrilotriacetic acid Chemical compound OC(=O)CN(CC(O)=O)CC(O)=O MGFYIUFZLHCRTH-UHFFFAOYSA-N 0.000 description 1
- 150000007524 organic acids Chemical class 0.000 description 1
- 235000005985 organic acids Nutrition 0.000 description 1
- QNGNSVIICDLXHT-UHFFFAOYSA-N para-ethylbenzaldehyde Natural products CCC1=CC=C(C=O)C=C1 QNGNSVIICDLXHT-UHFFFAOYSA-N 0.000 description 1
- KIWUVOGUEXMXSV-UHFFFAOYSA-N rhodanine Chemical compound O=C1CSC(=S)N1 KIWUVOGUEXMXSV-UHFFFAOYSA-N 0.000 description 1
- 229910052938 sodium sulfate Inorganic materials 0.000 description 1
- 235000011152 sodium sulphate Nutrition 0.000 description 1
- 150000003585 thioureas Chemical class 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
- G03C7/00—Multicolour photographic processes or agents therefor; Regeneration of such processing agents; Photosensitive materials for multicolour processes
- G03C7/30—Colour processes using colour-coupling substances; Materials therefor; Preparing or processing such materials
- G03C7/42—Bleach-fixing or agents therefor ; Desilvering processes
- G03C7/421—Additives other than bleaching or fixing agents
Description
Verfahren zum Bleichfixieren von photographischen Bildern Aus der deutschen Patentschrift Nr. 866605 ist ein Verfahren zum Bleichfixieren von photographi schen Silberbildern bekannt, nach welchem als Bleich fixierbäder Lösungen verwendet werden, die neben bekannten Fixiermitteln für Halogensilber Komplex salze des dreiwertigen Eisens mit bestimmten organi schen Säuren, wie zurr Beispiel mit der Athylen- diamintetraessigsäure bzw. der Nitrilotriessigsäure, enthalten.
Diese Bleichfixierbäder zeichnen sich durch eine hohe Beständigkeit aus und werden insbesondere zur Herstellung von Mehrfarbenbildern nach dem Verfahren der farbigen Entwicklung verwendet. Je doch zeigen diese Bäder den Nachteil, dass sie die Silberbilder an den Stellen höchster Dichte nicht immer vollkommen auszubleichen vermögen.
Die vorliegende Erfindung betrifft ein Verfahren zum Bleichfixieren von photographischen Bildern, das dadurch gekennzeichnet ist, dass man das Bleich fixieren in Gegenwart von organischen Verbindun-
EMI0001.0012
enthalten, vornimmt. Durch die genannten organi schen Verbindungen kann man die Wirksamkeit der Bleichfixierbäder verbessern, ohne ihre Haltbarkeit zu beeinträchtigen.
Das Verfahren zum Bleichfixieren gemäss der Er findung lässt sich insbesondere auch bei Mehrfarbenbil- dern nach dem Farbentwicklungsverfahren verwenden.
Organische Verbindungen, welche die Gruppe
EMI0001.0017
enthalten, sind beispielsweise: Thioharnstoff, ferner Derivate des Thioharnstof- fes, die durch Alkyl-, Aryl-, Aralkyl- oder hetero- cyclische Gruppen substituiert sind, wie zum Beispiel 4-Aminobenzolsulfosäurethioureid, N,N'-Dimethylol- thioharnstoff, Phenylthioharnstoff-4-sulfosaures Ka lium, N,N'-Dimethylthiohamstoff,
Trimethylthioharn- stoff, N,N'-Diacetylthioharnstoff.
Brauchbare Substanzen sind weiterhin: Tetramethyldiaminothiobenzophenon, Thiosemi- carbazid, Diäthanolaminsalz der Benzaldehydthio- semicarbazon-4-carbonsäure.
Substanzen folgender Formeln:
EMI0001.0040
EMI0002.0001
Cyclische Thioharnstoffderivate, zum Beispiel Thiobarbitursäure, 4-6-Diaminothiopyrimidin, 1-Me- thylthiohydantoin
EMI0002.0008
Thiazol- und Thiodiazolderivate, zum Beispiel:
EMI0002.0011
Vorzugsweise werden solche Substanzen verwen det, die in den Bleichfixierbädern gut löslich sind, und zwar in Mengen von 1-10 g pro Liter. Man setzt diese Substanzen vorzugsweise den Bleichfixier bädern zu.
Man kann sie aber auch in die zu verar beitenden photographischen Schichten, zum Beispiel durch ein Vorbad, einbringen.
<I>Beispiel 1</I> Ein zur Herstellung von farbigen photographi schen Bildern nach dem Verfahren der farbigen Ent wicklung bestimmtes Mehrschichtenmaterial wird nach der Belichtung in üblicher Weise in einem Farb- entwickler entwickelt und gewässert.
Anschliessend wird in einem Bleichbad folgender Zusammensetzung behandelt:
EMI0002.0017
1000 <SEP> em3 <SEP> Wasser
<tb> 32g <SEP> Tetranatriumsalz <SEP> der <SEP> Äthylendiamintetra essigsäure
<tb> 48 <SEP> g <SEP> Soda
<tb> 30g <SEP> Ferrichlorid <SEP> kristallisiert
<tb> 26 <SEP> g <SEP> Natriumsulfit <SEP> sicc.
<tb> 400 <SEP> g <SEP> Natriumthiosulfat <SEP> kristallisiert
<tb> 5 <SEP> g <SEP> 4-Aminobenzolsulfosäurethioureid <I>Beispiel 2</I> Ein farbenphotographisches Material, das wie in dem Beispiel 1 vorbehandelt wurde, wird in einem Bleichfixierbad folgender Zusammensetzung behan delt:
EMI0002.0018
1000 <SEP> cm3 <SEP> Wasser
<tb> 52 <SEP> g <SEP> Äthylendiaminotetraessigsaiires <SEP> Natrium
<tb> 48 <SEP> g <SEP> Soda
<tb> 30g <SEP> Ferrichlorid <SEP> kristallisiert
<tb> 20 <SEP> g <SEP> Natriumsulfit <SEP> sicc.
<tb> 400 <SEP> g <SEP> Natriumthiosulfat <SEP> kristallisiert
<tb> 10g <SEP> des <SEP> Umsetzungsproduktes <SEP> von <SEP> 50-70 <SEP> Mol
<tb> Äthylenoxyd <SEP> mit <SEP> 1 <SEP> Mol <SEP> Dimethylamin
<tb> 5 <SEP> g <SEP> Thioharnstoff <I>Beispiel 3</I> An Stelle des im Beispiel 2 angegebener, Thio- harnstoffes werden dem Bleixfixierbad 1 g Dimethylthioharnstoff oder 1 g Dimethylolthioharnstoff zugesetzt.
<I>Beispiel 4</I> Ein farbenphotographisches Material, das, wie in Beispiel 1 angegeben, vorbehandelt wurde, wird in einem Bade folgender Zusammensetzung gebleicht und fixiert:
EMI0002.0025
1000 <SEP> cm3 <SEP> Wasser
<tb> 40 <SEP> g <SEP> Ammoniumsalz <SEP> der <SEP> komplexen <SEP> Eisenäthy lendiarnintetraessigsäure
<tb> 120 <SEP> g <SEP> Ammoniumthiosulfat
<tb> 10g <SEP> Natriumsulfit
<tb> 5 <SEP> g <SEP> Phenylthioharnstoff-4-sulfonsaures <SEP> Kalium Weitere Beispiele für Bleichfixierbäder sind:
EMI0003.0001
<I>Beispiel <SEP> 5</I>
<tb> 1000 <SEP> cms <SEP> Wasser
<tb> 52 <SEP> g <SEP> Äthylendiamintetraessigsaures <SEP> Natrium
<tb> 48 <SEP> g <SEP> Soda
<tb> 30g <SEP> Ferrichlorid <SEP> kristallisiert
<tb> 26 <SEP> g <SEP> Natriumulfit <SEP> sicc.
<tb> 400 <SEP> g <SEP> Natriumthiosulfat <SEP> kristallisiert
<tb> 10g <SEP> des <SEP> Umsetzungsproduktes <SEP> von <SEP> 50-70 <SEP> Mo)
<tb> Äthylenoxyd <SEP> mit <SEP> 1 <SEP> Mol <SEP> Dimethylamin
<tb> 3 <SEP> g <SEP> einer <SEP> der <SEP> drei <SEP> folgenden <SEP> Substanzen
EMI0003.0002
EMI0003.0003
<I>Beispiel <SEP> 6</I>
<tb> 1000 <SEP> cm2 <SEP> Wasser
<tb> 40 <SEP> g <SEP> Ammoniumsalz <SEP> der <SEP> komplexen <SEP> Eisenäthy lendiamintetraessigsäure
<tb> 120 <SEP> g <SEP> Ammoniumthiosulfat
<tb> 10g <SEP> Natriumsulfat
<tb> 3 <SEP> g <SEP> Thiobarbitursäure <SEP> oder
<tb> 3 <SEP> g <SEP> Rhodanin
EMI0003.0004
Process for bleach-fixing of photographic images A process for bleach-fixing of photographic silver images is known from German patent specification No. 866605, according to which solutions are used as bleach-fixing baths which, in addition to known fixing agents for halogen silver, contain complex salts of trivalent iron with certain organic acids, as for example with ethylene diamine tetraacetic acid or nitrilotriacetic acid.
These bleach-fix baths are distinguished by their high resistance and are used in particular for the production of multicolor images by the color development process. However, these baths have the disadvantage that they are not always able to completely bleach the silver images in the areas of highest density.
The present invention relates to a method for bleach-fixing photographic images, which is characterized in that the bleaching is fixed in the presence of organic compounds
EMI0001.0012
contain, makes. The organic compounds mentioned can improve the effectiveness of the bleach-fix baths without affecting their shelf life.
The method of bleach-fixing according to the invention can also be used in particular in the case of multicolor images after the color development process.
Organic compounds that make up the group
EMI0001.0017
contain, for example: thiourea, also derivatives of thiourea, which are substituted by alkyl, aryl, aralkyl or heterocyclic groups, such as 4-aminobenzene sulfosauride, N, N'-dimethylol thiourea, phenylthiourea 4-sulfonic potassium, N, N'-dimethylthiourea,
Trimethylthiourea, N, N'-diacetylthiourea.
Usable substances are also: tetramethyldiaminothiobenzophenone, thiosemicarbazide, diethanolamine salt of benzaldehyde thiosemicarbazone-4-carboxylic acid.
Substances of the following formulas:
EMI0001.0040
EMI0002.0001
Cyclic thiourea derivatives, for example thiobarbituric acid, 4-6-diaminothiopyrimidine, 1-methylthiohydantoin
EMI0002.0008
Thiazole and thiodiazole derivatives, for example:
EMI0002.0011
Preferably those substances are used which are readily soluble in the bleach-fix baths, in amounts of 1-10 g per liter. These substances are preferably added to the bleach-fix baths.
But they can also be introduced into the photographic layers to be processed, for example by a pre-bath.
<I> Example 1 </I> A multilayer material intended for the production of colored photographic images by the process of color development is developed in a color developer in the usual way after exposure and washed with water.
The following composition is then treated in a bleach bath:
EMI0002.0017
1000 <SEP> em3 <SEP> water
<tb> 32g <SEP> tetrasodium salt <SEP> of <SEP> ethylenediaminetetra acetic acid
<tb> 48 <SEP> g <SEP> soda
<tb> 30g <SEP> ferric chloride <SEP> crystallizes
<tb> 26 <SEP> g <SEP> sodium sulfite <SEP> sicc.
<tb> 400 <SEP> g <SEP> sodium thiosulphate <SEP> crystallizes
<tb> 5 <SEP> g <SEP> 4-aminobenzene sulfosauride <I> Example 2 </I> A color photographic material which has been pretreated as in Example 1 is treated in a bleach-fix bath with the following composition:
EMI0002.0018
1000 <SEP> cm3 <SEP> water
<tb> 52 <SEP> g <SEP> ethylenediaminotetraessigsaiires <SEP> sodium
<tb> 48 <SEP> g <SEP> soda
<tb> 30g <SEP> ferric chloride <SEP> crystallizes
<tb> 20 <SEP> g <SEP> sodium sulfite <SEP> sicc.
<tb> 400 <SEP> g <SEP> sodium thiosulphate <SEP> crystallizes
<tb> 10g <SEP> of the <SEP> conversion product <SEP> of <SEP> 50-70 <SEP> mol
<tb> Ethylene oxide <SEP> with <SEP> 1 <SEP> mol <SEP> dimethylamine
<tb> 5 <SEP> g <SEP> thiourea <I> Example 3 </I> Instead of the thiourea specified in Example 2, 1 g of dimethylthiourea or 1 g of dimethylolthiourea are added to the lead fixer.
<I> Example 4 </I> A color photographic material which has been pretreated as indicated in Example 1 is bleached and fixed in a bath of the following composition:
EMI0002.0025
1000 <SEP> cm3 <SEP> water
<tb> 40 <SEP> g <SEP> ammonium salt <SEP> of the <SEP> complex <SEP> iron ethylene lendinetetraacetic acid
<tb> 120 <SEP> g <SEP> ammonium thiosulfate
<tb> 10g <SEP> sodium sulfite
<tb> 5 <SEP> g <SEP> phenylthiourea-4-sulfonic acid <SEP> potassium Further examples of bleach-fix baths are:
EMI0003.0001
<I> Example <SEP> 5 </I>
<tb> 1000 <SEP> cms <SEP> water
<tb> 52 <SEP> g <SEP> ethylenediaminetetraacetic acid <SEP> sodium
<tb> 48 <SEP> g <SEP> soda
<tb> 30g <SEP> ferric chloride <SEP> crystallizes
<tb> 26 <SEP> g <SEP> sodium sulfite <SEP> sicc.
<tb> 400 <SEP> g <SEP> sodium thiosulphate <SEP> crystallizes
<tb> 10g <SEP> of the <SEP> conversion product <SEP> from <SEP> 50-70 <SEP> Mo)
<tb> Ethylene oxide <SEP> with <SEP> 1 <SEP> mol <SEP> dimethylamine
<tb> 3 <SEP> g <SEP> one <SEP> of the <SEP> three <SEP> following <SEP> substances
EMI0003.0002
EMI0003.0003
<I> Example <SEP> 6 </I>
<tb> 1000 <SEP> cm2 <SEP> water
<tb> 40 <SEP> g <SEP> ammonium salt <SEP> of the <SEP> complex <SEP> iron ethylenediaminetetraacetic acid
<tb> 120 <SEP> g <SEP> ammonium thiosulfate
<tb> 10g <SEP> sodium sulfate
<tb> 3 <SEP> g <SEP> thiobarbituric acid <SEP> or
<tb> 3 <SEP> g <SEP> rhodanine
EMI0003.0004
Claims (1)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE336257X | 1953-12-05 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CH336257A true CH336257A (en) | 1959-02-15 |
Family
ID=6220167
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CH336257D CH336257A (en) | 1953-12-05 | 1954-10-30 | Method of bleach-fixing photographic images |
Country Status (1)
| Country | Link |
|---|---|
| CH (1) | CH336257A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1299221B (en) * | 1961-04-25 | 1969-07-10 | Agfa Ag | Process for stabilizing developed silver photographic images |
| FR2209951A1 (en) * | 1972-12-07 | 1974-07-05 | Hunt Chem Corp Philip A |
-
1954
- 1954-10-30 CH CH336257D patent/CH336257A/en unknown
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1299221B (en) * | 1961-04-25 | 1969-07-10 | Agfa Ag | Process for stabilizing developed silver photographic images |
| FR2209951A1 (en) * | 1972-12-07 | 1974-07-05 | Hunt Chem Corp Philip A |
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