DE3938573A1 - METHOD FOR DEVELOPING PHOTOGRAPHIC SILVER HALOGENIDE RECORDING MATERIALS - Google Patents
METHOD FOR DEVELOPING PHOTOGRAPHIC SILVER HALOGENIDE RECORDING MATERIALSInfo
- Publication number
- DE3938573A1 DE3938573A1 DE19893938573 DE3938573A DE3938573A1 DE 3938573 A1 DE3938573 A1 DE 3938573A1 DE 19893938573 DE19893938573 DE 19893938573 DE 3938573 A DE3938573 A DE 3938573A DE 3938573 A1 DE3938573 A1 DE 3938573A1
- Authority
- DE
- Germany
- Prior art keywords
- wetting agent
- developer
- recording materials
- photographic silver
- concentration
- 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- Withdrawn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
- 238000000034 method Methods 0.000 title claims description 12
- 239000000463 material Substances 0.000 title claims description 11
- 229910052709 silver Inorganic materials 0.000 title claims description 10
- 239000004332 silver Substances 0.000 title claims description 10
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 title description 3
- 239000000080 wetting agent Substances 0.000 claims description 14
- -1 silver halide Chemical class 0.000 claims description 10
- 239000000126 substance Substances 0.000 claims description 7
- QIGBRXMKCJKVMJ-UHFFFAOYSA-N Hydroquinone Chemical compound OC1=CC=C(O)C=C1 QIGBRXMKCJKVMJ-UHFFFAOYSA-N 0.000 claims description 4
- 239000000203 mixture Substances 0.000 claims description 4
- 239000013543 active substance Substances 0.000 claims description 3
- 229910052783 alkali metal Inorganic materials 0.000 claims description 2
- 125000003342 alkenyl group Chemical group 0.000 claims description 2
- 125000000129 anionic group Chemical group 0.000 claims description 2
- 230000018109 developmental process Effects 0.000 description 4
- 239000000839 emulsion Substances 0.000 description 4
- 239000000243 solution Substances 0.000 description 3
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 description 2
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 description 2
- 108010010803 Gelatin Proteins 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 125000002091 cationic group Chemical group 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 229910052731 fluorine Inorganic materials 0.000 description 2
- 239000011737 fluorine Substances 0.000 description 2
- 229920000159 gelatin Polymers 0.000 description 2
- 239000008273 gelatin Substances 0.000 description 2
- 235000019322 gelatine Nutrition 0.000 description 2
- 235000011852 gelatine desserts Nutrition 0.000 description 2
- 239000011241 protective layer Substances 0.000 description 2
- 125000005739 1,1,2,2-tetrafluoroethanediyl group Chemical group FC(F)([*:1])C(F)(F)[*:2] 0.000 description 1
- 206010070834 Sensitisation Diseases 0.000 description 1
- 241000519995 Stachys sylvatica Species 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 125000000217 alkyl group Chemical group 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- 125000003710 aryl alkyl group Chemical group 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000006260 foam Substances 0.000 description 1
- XMBWDFGMSWQBCA-UHFFFAOYSA-N hydrogen iodide Chemical compound I XMBWDFGMSWQBCA-UHFFFAOYSA-N 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 239000010410 layer Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- BKIMMITUMNQMOS-UHFFFAOYSA-N nonane Chemical compound CCCCCCCCC BKIMMITUMNQMOS-UHFFFAOYSA-N 0.000 description 1
- 239000002736 nonionic surfactant Substances 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 229920000233 poly(alkylene oxides) Polymers 0.000 description 1
- 229920000139 polyethylene terephthalate Polymers 0.000 description 1
- 239000005020 polyethylene terephthalate Substances 0.000 description 1
- 238000001454 recorded image Methods 0.000 description 1
- 239000013558 reference substance Substances 0.000 description 1
- 230000008929 regeneration Effects 0.000 description 1
- 238000011069 regeneration method Methods 0.000 description 1
- 230000008313 sensitization Effects 0.000 description 1
- ZUNKMNLKJXRCDM-UHFFFAOYSA-N silver bromoiodide Chemical compound [Ag].IBr ZUNKMNLKJXRCDM-UHFFFAOYSA-N 0.000 description 1
- 239000010802 sludge Substances 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 239000004094 surface-active agent Substances 0.000 description 1
Classifications
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03C—PHOTOSENSITIVE MATERIALS FOR PHOTOGRAPHIC PURPOSES; PHOTOGRAPHIC PROCESSES, e.g. CINE, X-RAY, COLOUR, STEREO-PHOTOGRAPHIC PROCESSES; AUXILIARY PROCESSES IN PHOTOGRAPHY
- G03C1/00—Photosensitive materials
- G03C1/005—Silver halide emulsions; Preparation thereof; Physical treatment thereof; Incorporation of additives therein
- G03C1/06—Silver halide emulsions; Preparation thereof; Physical treatment thereof; Incorporation of additives therein with non-macromolecular additives
- G03C1/38—Dispersants; Agents facilitating spreading
- G03C1/385—Dispersants; Agents facilitating spreading containing fluorine
-
- 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
- G03C5/26—Processes using silver-salt-containing photosensitive materials or agents therefor
- G03C5/29—Development processes or agents therefor
- G03C5/305—Additives other than developers
- G03C5/3053—Tensio-active agents or sequestering agents, e.g. water-softening or wetting agents
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Chemical & Material Sciences (AREA)
- Spectroscopy & Molecular Physics (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Silver Salt Photography Or Processing Solution Therefor (AREA)
Description
Die Erfindung betrifft ein Verfahren zum Entwickeln von photographischen Silberhalogenidaufzeichnungsmaterialien, insbesondere für die Anwendung in der Röntgendiagnostik und in der Reproduktionstechnik.The invention relates to a method for developing silver halide photographic materials, especially for use in X-ray diagnostics and in Reproduction technology.
Aus der Patentschrift DE 21 24 262-C2 ist bekannt, photographische Silberhalogenidaufzeichnungsmaterialien durch Beschichten von flexiblen Trägern mit lichtempfindlichen Silberhalogenidemulsionen herzustellen, die nichtionische fluorierte oberflächenaktive Substanzen enthalten. Die so erhaltenen Materialien haben eine Reihe vorteilhafter Eigenschaften, beispielsweise eine geringe Neigung zu elektrostatischer Aufladung.From the patent DE 21 24 262-C2 is known photographic Silver halide recording materials by coating flexible supports with light-sensitive silver halide emulsions to manufacture the nonionic fluorinated surfactant Contain substances. The materials thus obtained have one A number of advantageous properties, for example a low one Tendency to electrostatic charge.
Entwickelt man solche Materialien mit Hilfe einer Rollenentwicklungsmaschine, dann wird das aufgezeichnete Bild durch das Auftreten heller Flecken gestört. Diese Flecken erscheinen in unterschiedlicher Form und Größe in unregelmäßigen Abständen. Sie sind äußerst störend, da sie beispielsweise bei diagnostischen Röntgenaufnahmen zu Fehldiagnosen führen können. Insbesondere beobachtet man ihr Erscheinen bei der Verwendung von konzentrierten Entwicklern, die mehr als 15 g/l einer Dihydroxybenzol-Entwicklersubstanz, beispielsweise Hydrochinon, und mehr als 0,15 mol/l eines Alkalimetallsulfits enthalten und die einen pH von nicht mehr als 11,5 besitzen. Solche Entwickler werden für die Verwendung in Rollenentwicklungsmaschinen wegen ihrer Stabilität, Aktivität und Ausnutzbarkeit bevorzugt (siehe z. B. L. F. A. Mason, Processing Chemistry, Focal Press, London und New York 1966, Seite 151, Tabelle).If you develop such materials with the help of a roll development machine, then the recorded image is replaced by the Light spots disturbed. These spots appear in different shape and size at irregular intervals. they are extremely disruptive, as they are used for example in diagnostic X-rays can lead to misdiagnosis. In particular one observes their appearance when using concentrated developers who have more than 15 g / l of one Dihydroxybenzene developer substance, for example hydroquinone, and contain more than 0.15 mol / l of an alkali metal sulfite and which have a pH of no more than 11.5. Such developers are for use in roll developing machines preferred stability, activity and exploitability (see e.g. B.L.A. Mason, Processing Chemistry, Focal Press, London and New York 1966, page 151, table).
Die Erfindung stellt sich die Aufgabe, das Entwicklungsverfahren für Silberhalogenidaufzeichnungsmaterialien, welche nichtionische fluorhaltige oberflächenaktive Substanzen enthalten, so fortzubilden, daß das Auftreten des beschriebenen Fehlers vermieden wird. The object of the invention is the development process for silver halide recording materials which are nonionic contain fluorine-containing surface-active substances, so train that the occurrence of the described error is avoided.
Diese Aufgabe wird durch ein Verfahren nach dem Anspruch 1 gelöst.This object is achieved by a method according to claim 1.
Das Netzmittel ist dabei so auszuwählen, daß es in der Entwicklerlösung in einer Konzentration von mindestens 0,1 g/l klar löslich ist. Netzmittel, die lediglich dispergiert werden, sind nicht geeignet, da sie ihrerseits die Bildung von Schlamm fördern und zur Verunreinigung der entwickelten Materialien führen können. Eine obere Grenze für die Konzentration existiert grundsätzlich nicht; aus praktischen Gründen (Schaumbildung, Kosten) sollten 10 g/l nicht überschritten werden.The wetting agent should be selected so that it is in the Developer solution in a concentration of at least 0.1 g / l is clearly soluble. Wetting agents that are only dispersed are not suitable because they in turn form sludge promote and lead to contamination of the developed materials can. There is an upper limit on the concentration basically not; for practical reasons (foam formation, Costs) should not exceed 10 g / l.
Bevorzugt werden für die Ausführung des erfindungsgemäßen Verfahrens anionische Netzmittel verwendet. Diese sind auch in der leicht alkalischen Entwicklerlösung im allgemeinen leichter löslich als kationische oder nichtionische Substanzen. Außerdem beeinflussen sie im allgemeinen das photographische Ergebnis weniger als kationische Netzmittel.Are preferred for the execution of the invention Process used anionic wetting agents. These are also in the slightly alkaline developer solution generally lighter soluble as cationic or non-ionic substances. Furthermore they generally affect the photographic result less than cationic wetting agents.
Ein bevorzugter Konzentrationsbereich für das Netzmittel liegt oberhalb von 0,5 g/l.A preferred concentration range for the wetting agent is above 0.5 g / l.
Folgende Netzmittel haben sich für die Ausführung des Verfahrens besonders bewährt:The following wetting agents have been used to carry out the process particularly proven:
Mischung ausMixture of
mit R = α-C₁₀-Alkenyl (Handelsname Dowfax 3B2)with R = α-C₁₀ alkenyl (trade name Dowfax 3B2)
Die im Rahmen der Erfindung verwendeten fluorhaltigen nichtionischen oberflächenaktiven Substanzen besitzen Moleküle, die vorzugsweise aus einem Polyalkylenoxid- und einem teilweise oder vollständig fluorierten Alkyl- oder Aralkylteil zusammengesetzt sind, die durch eine Brücke, beispielsweise eine Ether- oder Sulfoncarbamidbrücke verbunden sind. Beispiele für solche Substanzen sind:The fluorine-containing used in the invention nonionic surfactants have molecules which preferably consist of a polyalkylene oxide and a partial or fully fluorinated alkyl or aralkyl part are composed by a bridge, for example a Ether or sulfonecarbamide bridge are connected. examples for such substances are:
Gemisch ausMixture of
F(CF₂CF₂)m-CH₂CH₂-O-(CH₂CH₂-O-)₁₁H (II,1)F (CF₂CF₂) m -CH₂CH₂-O- (CH₂CH₂-O-) ₁₁H (II, 1)
mit m = 2 bis 8
(Handelsname Zonyl FSN)with m = 2 to 8
(Trade name Zonyl FSN)
Gemisch ausMixture of
F(CF₂)n-(CH₂CH₂-O-)mH (II,2)F (CF₂) n - (CH₂CH₂-O-) m H (II, 2)
mit n = 6, 8 oder 10 und m = 6 bis 12
(Handelsname Lodyne S 107)with n = 6, 8 or 10 and m = 6 to 12
(Trade name Lodyne S 107)
C₈H₁₇-SO₂-N(CH₃)-CO-O-(CH₂CH₂-O-)₁₉-C₄H₉ (II,3)C₈H₁₇-SO₂-N (CH₃) -CO-O- (CH₂CH₂-O-) ₁₉-C₄H₉ (II, 3)
(Handelsname FT 219)(Trade name FT 219)
Die Konzentration des Netzmittels in der Entwicklerlösung nimmt im allgemeinen während des Gebrauchs durch Austragen und Regenerieren mehr oder weniger schnell ab. Dies gilt insbesondere bei niedrigen Ausgangswerten der Konzentration. Daher kann es vorteilhaft sein, in Abhängigkeit vom Materialdurchsatz eine wäßrige Lösung des Netzmittels in den Entwicklungstank oder in die Regeneratleitung zu dosieren, um eine gleichmäßige niedrige Konzentration aufrechtzuerhalten.The concentration of the wetting agent in the developer solution decreases general during use by discharge and regeneration more or less quickly. This is especially true at low Initial concentration values. Therefore, it can be beneficial depending on the material throughput an aqueous solution of Wetting agent in the development tank or in the regenerate line to dose to maintain an even low concentration maintain.
Durch das erfindungsgemäße Verfahren ist es möglich, die vorteilhaften Wirkungen der nichtionischen fluorierten oberflächenaktiven Substanzen auf die Eigenschaften der photographischen Silberhalogenidmaterialien uneingeschränkt zu nutzen.The inventive method, it is possible beneficial effects of nonionic fluorinated surface-active substances on the properties of the silver halide photographic materials use.
Das erfindungsgemäße Verfahren kann bei der Verwendung von photographischen Silberhalogenidaufzeichnungsmaterialien, insbesondere in der medizinischen Diagnostik mit Röntgenstrahlen und in der Reproduktionstechnik angewendet werden.The method according to the invention can be used when using silver halide photographic materials, especially in medical diagnostics with X-rays and be used in reproduction technology.
Eine Silberiodobromidemulsion, deren Kristalle ein mittleres Kornvolumen von 0,4 µm³ einen Iodidgehalt von 2 Molprozent hatten, wurde auf beide Seiten eines Polyethylenterephthalat-Schichtträgers aufgetragen. Die Emulsion enthielt 100 g Gelatine je mol Silber und übliche Zusätze zur chemischen Sensibilisierung und Stabilisierung sowie übliche Beschichtungshilfsmittel. Das Silberauftragsgewicht auf jeder Seite betrug 2,6 g/m². Auf die Emulsionsschicht wurde auf beiden Seiten eine Gelatine-Schutzschicht mit einem Auftragsgewicht von je 1,3 g/m² aufgetragen. Außerdem enthielt die Schutzschicht noch eine nichtionische fluorhaltige oberflächenaktive Substanz, wie für die verschiedenen, im übrigen gleichen Proben in der Tabelle angegeben.A silver iodobromide emulsion, the crystals of which are medium Grain volume of 0.4 µm³ had an iodide content of 2 mole percent, was on both sides of a polyethylene terephthalate support applied. The emulsion contained 100 g of gelatin per mole of silver and usual additives for chemical sensitization and stabilization as well as usual coating aids. The Silver coat weight on each side was 2.6 g / m². On the The emulsion layer became a gelatin protective layer on both sides with an application weight of 1.3 g / m² each applied. The protective layer also contained one nonionic fluorosurfactant as for different, otherwise the same samples in the table specified.
35 × 43 cm große Blätter der verschiedenen Probefilme wurden so belichtet, daß ihre optische Dichte nach der Verarbeitung zwischen 1 und 2 lag. Die belichteten Blätter wurden in einer Rollenentwicklungsmaschine in 90 s Gesamtverarbeitungszeit bei 34°C verarbeitet, wobei ein handelsüblicher Fixierbad und einer der folgenden Entwickler benutzt wurden:35 × 43 cm sheets of the various test films were made in this way exposes that their optical density after processing between 1 and 2 lay. The exposed sheets were in a Roll development machine in 90 s total processing time 34 ° C processed, using a commercially available fixer and one of the following developers were used:
Die entwickelten Filmblätter wurden mit Hilfe eines Lichtkastens auf das Vorhandensein von weißen Flecken untersucht. Die Ergebnisse sind in der Tabelle am Ende der Beschreibung enthalten.The developed film sheets were made using a light box checked for the presence of white spots. The Results are shown in the table at the end of the description.
Die Löslichkeit der als Vergleichssubstanzen verwendeten Netzmittel A, B und C im Entwickler der Formel A liegt unter 0,1 g/l. Nachstehend sind die Strukturformeln dieser Substanzen angegeben:The solubility of the used as reference substances Wetting agents A, B and C in the developer of formula A are below 0.1 g / l. Below are the structural formulas of these substances specified:
Claims (4)
Priority Applications (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19893938573 DE3938573A1 (en) | 1989-11-21 | 1989-11-21 | METHOD FOR DEVELOPING PHOTOGRAPHIC SILVER HALOGENIDE RECORDING MATERIALS |
| CA 2029945 CA2029945A1 (en) | 1989-11-21 | 1990-11-14 | Process for developing silver halide recording materials |
| EP90121873A EP0429973A1 (en) | 1989-11-21 | 1990-11-15 | Method for developing photographic silver halide recording materials |
| JP31302490A JPH03211546A (en) | 1989-11-21 | 1990-11-20 | Method of developing silver halide recording material |
| US07/870,209 US5215873A (en) | 1989-11-21 | 1992-04-13 | Process for developing silver halide recording materials |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19893938573 DE3938573A1 (en) | 1989-11-21 | 1989-11-21 | METHOD FOR DEVELOPING PHOTOGRAPHIC SILVER HALOGENIDE RECORDING MATERIALS |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| DE3938573A1 true DE3938573A1 (en) | 1991-05-23 |
Family
ID=6393907
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DE19893938573 Withdrawn DE3938573A1 (en) | 1989-11-21 | 1989-11-21 | METHOD FOR DEVELOPING PHOTOGRAPHIC SILVER HALOGENIDE RECORDING MATERIALS |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP0429973A1 (en) |
| JP (1) | JPH03211546A (en) |
| CA (1) | CA2029945A1 (en) |
| DE (1) | DE3938573A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19948651A1 (en) * | 1999-09-29 | 2003-07-17 | Schering Ag | Nuclear magnetic resonance imaging contrast agent formulations containing perfluoroalkylated paramagnetic and diamagnetic compounds, having high organ specificity, especially for the lymph nodes |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4209347A1 (en) * | 1992-03-23 | 1993-09-30 | Agfa Gevaert Ag | developer |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1447658B (en) * | Eastman Kodak Co., Rochester, N.Y. (V.StA.) | Developer solution for the development of fine-grain, high-contrast silver chloride emulsions | ||
| US2000353A (en) * | 1930-01-14 | 1935-05-07 | Agfa Ansco Corp | Process of treating photographic layers in a bath containing a wetting agent and new preparations intended for acting on photographic layers |
| DE2061844C2 (en) * | 1969-12-19 | 1983-09-01 | E.I. du Pont de Nemours and Co., 19898 Wilmington, Del. | Silver halide developer solution for lithographic use |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1293189A (en) * | 1970-06-04 | 1972-10-18 | Agfa Gevaert | Photographic silver halide element |
| JPS51101529A (en) * | 1975-03-04 | 1976-09-08 | Oriental Photo Ind Co Ltd | SHASHINSHORIHOHO |
| JPS5362524A (en) * | 1976-11-17 | 1978-06-05 | Konishiroku Photo Ind Co Ltd | Processing solution for silver halide photographic material |
| JPS5399928A (en) * | 1977-02-10 | 1978-08-31 | Konishiroku Photo Ind Co Ltd | Preparation of silver halide photosensitive material |
| EP0071344B1 (en) * | 1981-07-23 | 1986-01-29 | E.I. Du Pont De Nemours And Company | Stable photographic developer and replenisher therefor |
| US4508764A (en) * | 1982-12-14 | 1985-04-02 | E. I. Du Pont De Nemours And Company | Coating process employs surfactants |
| JPS62269956A (en) * | 1986-05-19 | 1987-11-24 | Fuji Photo Film Co Ltd | Image forming method |
| JPS63142349A (en) * | 1986-12-05 | 1988-06-14 | Fuji Photo Film Co Ltd | Forming of high contrast negative image |
-
1989
- 1989-11-21 DE DE19893938573 patent/DE3938573A1/en not_active Withdrawn
-
1990
- 1990-11-14 CA CA 2029945 patent/CA2029945A1/en not_active Abandoned
- 1990-11-15 EP EP90121873A patent/EP0429973A1/en not_active Withdrawn
- 1990-11-20 JP JP31302490A patent/JPH03211546A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1447658B (en) * | Eastman Kodak Co., Rochester, N.Y. (V.StA.) | Developer solution for the development of fine-grain, high-contrast silver chloride emulsions | ||
| US2000353A (en) * | 1930-01-14 | 1935-05-07 | Agfa Ansco Corp | Process of treating photographic layers in a bath containing a wetting agent and new preparations intended for acting on photographic layers |
| DE2061844C2 (en) * | 1969-12-19 | 1983-09-01 | E.I. du Pont de Nemours and Co., 19898 Wilmington, Del. | Silver halide developer solution for lithographic use |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19948651A1 (en) * | 1999-09-29 | 2003-07-17 | Schering Ag | Nuclear magnetic resonance imaging contrast agent formulations containing perfluoroalkylated paramagnetic and diamagnetic compounds, having high organ specificity, especially for the lymph nodes |
| DE19948651B4 (en) * | 1999-09-29 | 2006-10-05 | Schering Ag | Galenic formulations containing para and diamagnetic perfluorinated compounds, their preparation and use |
Also Published As
| Publication number | Publication date |
|---|---|
| CA2029945A1 (en) | 1991-05-22 |
| JPH03211546A (en) | 1991-09-17 |
| EP0429973A1 (en) | 1991-06-05 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| OP8 | Request for examination as to paragraph 44 patent law | ||
| 8130 | Withdrawal |