DE972067C - Process for increasing the whiteness of photographic reflective images - Google Patents
Process for increasing the whiteness of photographic reflective imagesInfo
- Publication number
- DE972067C DE972067C DEF3083D DEF0003083D DE972067C DE 972067 C DE972067 C DE 972067C DE F3083 D DEF3083 D DE F3083D DE F0003083 D DEF0003083 D DE F0003083D DE 972067 C DE972067 C DE 972067C
- Authority
- DE
- Germany
- Prior art keywords
- whiteness
- photographic
- increasing
- reflective images
- substances
- 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
Links
Classifications
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03C—PHOTOSENSITIVE MATERIALS FOR PHOTOGRAPHIC PURPOSES; PHOTOGRAPHIC PROCESSES, e.g. CINE, X-RAY, COLOUR, STEREO-PHOTOGRAPHIC PROCESSES; AUXILIARY PROCESSES IN PHOTOGRAPHY
- G03C1/00—Photosensitive materials
- G03C1/76—Photosensitive materials characterised by the base or auxiliary layers
- G03C1/815—Photosensitive materials characterised by the base or auxiliary layers characterised by means for filtering or absorbing ultraviolet light, e.g. optical bleaching
- G03C1/8155—Organic compounds therefor
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03C—PHOTOSENSITIVE MATERIALS FOR PHOTOGRAPHIC PURPOSES; PHOTOGRAPHIC PROCESSES, e.g. CINE, X-RAY, COLOUR, STEREO-PHOTOGRAPHIC PROCESSES; AUXILIARY PROCESSES IN PHOTOGRAPHY
- G03C1/00—Photosensitive materials
- G03C1/76—Photosensitive materials characterised by the base or auxiliary layers
- G03C1/815—Photosensitive materials characterised by the base or auxiliary layers characterised by means for filtering or absorbing ultraviolet light, e.g. optical bleaching
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Paper (AREA)
Description
Verfahren zur Erhöhung der Weißen von photographischen Aufsichtsbildern Die Erfindung betrifft ein Verfahren zur Erhöhung der Weißen von photographischen Aufsichtsbildern durch den Zusatz von blaufluoreszierenden Derivaten der 4,4'-Diaminostilben-2,2'-disulfosäure oder ihrer Salze zu den zur Herstellung der Aufsichtsbilder dienenden Materialien. Durch die im blauen Teil des Spektrums liegende Fluoreszenz dieser Stoffe soll der Gelbstich des weißen Photopapiers vermieden werden.Process for increasing the whiteness of reflective photographic images The invention relates to a method for increasing the whiteness of photographic images Non-reflective images through the addition of blue fluorescent derivatives of 4,4'-diaminostilbene-2,2'-disulfonic acid or their salts for the materials used to produce the reflective images. Due to the fluorescence of these substances in the blue part of the spectrum, the Yellowing of the white photographic paper can be avoided.
Photographische Papiere, die in der Schicht oder im Papier fluoreszierende Substanzen enthalten, sind in verschiedenen Variationen bekannt. Man kennt z. B. insbesondere für Zwecke der Röntgenphotographie bestimmte Papiere, denen zur Erhöhung der Kontraste fluoreszierende Stoffe vom Farbstoffcharakter zugesetzt waren, die unter der Einwirkung von ultraviolettem Licht ein Fluoreszenzlicht aus dem hellen Teil des Spektrums, also aus dem Grüngelb oder Rot ausstrahlen. Man hat dabei auch die Auswahl der fluoreszierenden Stoffe so getroffen, daß ein weißes Fluoreszenzlicht resultierte (deutsche Patentschriften 623 I2o, 625 225).Photographic papers that are fluorescent in the layer or in the paper Substances containing are known in different variations. One knows z. B. in particular papers intended for X-ray photography, those for enhancement fluorescent substances of the character of a dye were added to the contrasts under the action of ultraviolet light, a fluorescent light from the bright Part of the spectrum, i.e. from which green-yellow or red radiate. One also has the selection of fluorescent substances is made so that a white fluorescent light resulted (German patents 623 12o, 625 225).
Weiterhin sind Röntgenpapiere bekannt, die in der Schicht unter anderem auch blaufluoreszierende Stoffe enthalten, deren Zweck der Ersatz der bekannten Verstärkerschirmeist (USA.-Patentschrift 1315 324).Furthermore, X-ray papers are known that are used in the layer, among other things also contain blue fluorescent substances, the purpose of which is to replace the known ones Intensifying screens is (U.S. Patent 1315,324).
Es war ferner aus der britischen Patentschrift 522 672 bekannt, die Erhöhung des Weißgrades von Papier durch Zusatz von blaufluoreszierenden Stoffen, insbesondere Methyl-umbelliferon zu bewirken. Stilbenderivate hat man bisher wegen ihres Absorptionsvermögens für UV-Strahlen auch in Verpackungspapieren angewandt (deutsche Patentschrift 64o 9o8, britische Patentschrift 495 479, USA.-Patentschrift 2 222 532). Es ist ferner bekannt, Stilbenderivate der beanspruchten Art Textilien zum Zwecke der Erhöhung der Weißen zuzusetzen (USA.-Patentschrift 2 089 4i3).It was also known from British patent specification 522 672 to increase the whiteness of paper by adding blue fluorescent substances, in particular methyl umbelliferone. Stilbene derivatives have hitherto also been used in packaging papers because of their ability to absorb UV rays (German patent specification 64o 908, British patent specification 495 479, USA patent specification 2 222 532). It is also known, stilbene derivatives for the purpose of increasing add the claimed type of textiles whites (USA. Patent 2,089 4i3).
Die Verwendung von Stilbenderivaten der in den Beispielen genannten Art in Papieren zum Zwecke der Aufhellung der Weißen ist ferner Gegenstand des älteren Patents 746 569.The use of stilbene derivatives of those mentioned in the examples Art in papers for the purpose of lightening the whites is also the subject of the older Patent 746,569.
Die Herstellung von Papieren an sich unter Zusatz der beanspruchten Aufheller ist somit nicht Gegenstand des vorliegenden Patents.The production of papers per se with the addition of the claimed Brighteners are therefore not the subject of the present patent.
Die beanspruchten Stilbenverbindungen bieten in photographischen Schichten den Vorteil, nicht die Entwicklung der photographischen Emulsion zu stören, ferner übertreffen sie an Helligkeit der Fluoreszenz die bisher als Zusätze zu photographischen Emulsionen bekannten Stoffe.The claimed stilbene compounds offer in photographic layers the advantage of not interfering with the development of the photographic emulsion, furthermore They surpass the brightness of the fluorescence that was previously available as additions to photographic ones Emulsions known substances.
Die fluoreszierenden organischen Substanzen können mit gleicher Wirkung der Emulsion selbst, dem Schichtträger, der Barytschicht, einer bereits vorhandenen Zwischenschicht oder einer besonderen, in Nachbarschaft unter der Emulsionsschicht liegenden Trägerschicht einverleibt werden. versetzt. Beispiel 2 Photographischer Rohstoff wird gebadet in einer Lösung, die pro Liter etwa o,2 bis i g des Umsetzungsproduktes von überschüssigem Kaliumzyanat mit zugesetzt. ' Beispiel 4 Auf =o 115 %ige Bariumchloridlösung, die zur Fällung Beispiel 5 0,05 g desselben Körpers wie bei Beispiel 4 werden auf =1 einer 3°/aigen Gelatine zugesetzt, die für die Vorleimung eines photographischen Rohstoffes verwendet wird. Um zu verhüten, daB diefluoreszierenden organischen Stoffe in den photographischen Bädern ganz oder teilweise wieder entfernt werden, hat es sich als zweckmäßig erwiesen, sie in Form von Verbindungen, die in alkalischen oder sauren wäßrigen Lösungen schwer bzw. unlöslich sind, zu verwenden. Beispielsweise sind für diesen Zweck die Erdalkalisalze der in Frage stehenden Körper gut geeignet. In letzterem Fall kann die in Wasser unlösliche Form der fluoreszierenden organischen Substanz bereits bei der Fällung des zur Herstellung der Barytage verwendeten Bariumsulfates mitgebildet werden. Auch ist es möglich, nach bekannter Art in der Schicht selbst oder an den Grenzflächen der Schicht Ausfällungen zu erzeugen und dadurch eine Diffusion oder eine Auslaugung der Stoffe aus der Schicht zu verhindern. Endlich ist es möglich, durch Einführung geeigneter chemischer substantiver oder anderer diffusionsfestmachender Gruppen die Stoffein der Schicht zu fixieren. Auch andere in Wasser schwer- oder unlösliche, in organischen Lösungsmitteln dagegen lösliche Salze der in Frage stehenden Körper, wie Salze mit Fettaminen, Dizyklohexylaminen und Guanidinen, kommen für diesen Zweck in Frage. Beispiel i = 1 einer photographischen Emulsion wird mit 0,05 g des Körpers 4,4'-Diaminostilben-2,2'-disulfosäure (als Kaliumsalz) gelöst enthält.The fluorescent organic substances can be incorporated with the same effect into the emulsion itself, the layer support, the barite layer, an existing intermediate layer or a special support layer located in the vicinity under the emulsion layer. offset. Example 2 Photographic raw material is bathed in a solution which contains about 0.2 to 1% of the reaction product of excess potassium cyanate per liter added. 'Example 4 On = o 115% barium chloride solution, which is used for the precipitation EXAMPLE 5 0.05 g of the same body as in Example 4 is added to 1 of a 3% gelatin which is used for the pre-sizing of a photographic raw material. In order to prevent the fluorescent organic substances from being completely or partially removed again in the photographic baths, it has proven to be useful to use them in the form of compounds which are difficult or insoluble in alkaline or acidic aqueous solutions. For example, the alkaline earth salts of the bodies in question are well suited for this purpose. In the latter case, the water-insoluble form of the fluorescent organic substance can already be formed during the precipitation of the barium sulfate used to produce the barium sulfate. It is also possible, in a known manner, to generate precipitates in the layer itself or at the interfaces of the layer and thereby prevent diffusion or leaching of the substances from the layer. Finally it is possible to fix the substances in the layer by introducing suitable chemical substantive or other diffusion-proofing groups. Other salts of the bodies in question which are sparingly or insoluble in water but soluble in organic solvents, such as salts with fatty amines, dicyclohexylamines and guanidines, are also suitable for this purpose. Example i = 1 of a photographic emulsion is dissolved with 0.05 g of the body containing 4,4'-diaminostilbene-2,2'-disulfonic acid (as potassium salt).
Beispiel 3 Auf i kg Bariumsulfat, das für die Herstellung des Barytstriches verwendet werden soll, werden 2 g des Körpers des im Barytstrich verarbeiteten Bariumsulfats verwendetwerdensoll, werden o,o5 g des folgendenKörpers zugesetzt .Example 3 On 1 kg of barium sulfate, which is used for the production of the barite coating is to be used, 2 g of the body of the barium sulfate processed in the barium coating are used is to be used, 0.05 g of the following body is added.
Claims (1)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DEF3083D DE972067C (en) | 1941-02-18 | 1941-02-19 | Process for increasing the whiteness of photographic reflective images |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DEF0003083 | 1941-02-18 | ||
DEF3083D DE972067C (en) | 1941-02-18 | 1941-02-19 | Process for increasing the whiteness of photographic reflective images |
Publications (1)
Publication Number | Publication Date |
---|---|
DE972067C true DE972067C (en) | 1959-05-14 |
Family
ID=25973693
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DEF3083D Expired DE972067C (en) | 1941-02-18 | 1941-02-19 | Process for increasing the whiteness of photographic reflective images |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE972067C (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1150274B (en) * | 1959-03-21 | 1963-06-12 | Leonar Werke Ag | Process for the production of a photographic material with optical brighteners embedded in a diffusion-proof manner |
US3127270A (en) * | 1959-07-31 | 1964-03-31 | New stilbene compounds | |
DE3446962A1 (en) * | 1983-12-22 | 1985-07-04 | Fuji Photo Film Co., Ltd., Minami-Ashigara, Kanagawa | PHOTOGRAPHIC SILVER HALOGENIDE PRINT PAPER AND USE OF THE PAPER IN THE BLACK AND WHITE DEVELOPMENT PROCESS |
Citations (18)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1315324A (en) * | 1919-09-09 | Tjotted sll | ||
FR615932A (en) * | 1925-09-28 | 1927-01-19 | Ultra-sensitive x-ray films | |
DE532232C (en) * | 1929-05-22 | 1931-08-26 | Rudolf Fischer Dr | Process for the production of double-sided light-sensitive layer supports |
DE623120C (en) * | 1933-04-07 | 1936-02-05 | Hans Lewin Dr | Radiation-sensitive opaque image carriers, such as paper, for the production of photographic or X-ray photographic images to be viewed in ultraviolet light |
DE625225C (en) * | 1933-04-07 | 1936-02-06 | Hans Lewin Dr | Process for increasing the contrast of X-ray images on opaque documents |
GB442530A (en) * | 1934-08-08 | 1936-02-10 | Ici Ltd | Improvements in the preparation of safety paper |
DE640908C (en) * | 1933-03-12 | 1937-01-15 | I G Farbenindustrie Akt Ges | Colorless or lightly colored protective cover for light or air-sensitive goods of all kinds |
US2089413A (en) * | 1937-08-10 | Production of novel effects on | ||
GB491165A (en) * | 1936-12-10 | 1938-08-29 | Hans Lewin | Improvements relating to the viewing of pictures so as to obtain increased range of contrast |
GB493308A (en) * | 1936-04-29 | 1938-10-06 | Ig Farbenindustrie Ag | Improvements relating to colour photography |
GB495479A (en) * | 1937-03-20 | 1938-11-14 | Ig Farbenindustrie Ag | Improvements in protective casings for goods sensitive to light and air |
GB503752A (en) * | 1936-07-07 | 1939-04-11 | Kodak Ltd | Process of colour photography |
US2179239A (en) * | 1935-04-10 | 1939-11-07 | Agfa Ansco Corp | Color photography |
GB522672A (en) * | 1939-06-02 | 1940-06-24 | Meyer Hans | Treating articles, substances or materials of a yellowish or off-white tint so as to obtain a pure white appearance |
AT159319B (en) * | 1936-10-27 | 1940-08-10 | Ig Farbenindustrie Ag | Ultraviolet absorbing filter layers. |
US2222532A (en) * | 1933-03-11 | 1940-11-19 | Walther H Duisberg | Sheet material |
DE731558C (en) * | 1940-08-31 | 1943-02-11 | Ig Farbenindustrie Ag | laundry detergent |
DE746569C (en) * | 1940-10-17 | 1944-12-14 | Ig Farbenindustrie Ag | Whitening agent for organic matter |
-
1941
- 1941-02-19 DE DEF3083D patent/DE972067C/en not_active Expired
Patent Citations (19)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1315324A (en) * | 1919-09-09 | Tjotted sll | ||
US2089413A (en) * | 1937-08-10 | Production of novel effects on | ||
FR615932A (en) * | 1925-09-28 | 1927-01-19 | Ultra-sensitive x-ray films | |
DE532232C (en) * | 1929-05-22 | 1931-08-26 | Rudolf Fischer Dr | Process for the production of double-sided light-sensitive layer supports |
US2222532A (en) * | 1933-03-11 | 1940-11-19 | Walther H Duisberg | Sheet material |
DE640908C (en) * | 1933-03-12 | 1937-01-15 | I G Farbenindustrie Akt Ges | Colorless or lightly colored protective cover for light or air-sensitive goods of all kinds |
DE623120C (en) * | 1933-04-07 | 1936-02-05 | Hans Lewin Dr | Radiation-sensitive opaque image carriers, such as paper, for the production of photographic or X-ray photographic images to be viewed in ultraviolet light |
DE625225C (en) * | 1933-04-07 | 1936-02-06 | Hans Lewin Dr | Process for increasing the contrast of X-ray images on opaque documents |
GB442530A (en) * | 1934-08-08 | 1936-02-10 | Ici Ltd | Improvements in the preparation of safety paper |
US2179239A (en) * | 1935-04-10 | 1939-11-07 | Agfa Ansco Corp | Color photography |
GB493308A (en) * | 1936-04-29 | 1938-10-06 | Ig Farbenindustrie Ag | Improvements relating to colour photography |
GB503752A (en) * | 1936-07-07 | 1939-04-11 | Kodak Ltd | Process of colour photography |
AT159319B (en) * | 1936-10-27 | 1940-08-10 | Ig Farbenindustrie Ag | Ultraviolet absorbing filter layers. |
GB491165A (en) * | 1936-12-10 | 1938-08-29 | Hans Lewin | Improvements relating to the viewing of pictures so as to obtain increased range of contrast |
US2171427A (en) * | 1937-03-20 | 1939-08-29 | Ig Farbenindustrie Ag | Wrapping material |
GB495479A (en) * | 1937-03-20 | 1938-11-14 | Ig Farbenindustrie Ag | Improvements in protective casings for goods sensitive to light and air |
GB522672A (en) * | 1939-06-02 | 1940-06-24 | Meyer Hans | Treating articles, substances or materials of a yellowish or off-white tint so as to obtain a pure white appearance |
DE731558C (en) * | 1940-08-31 | 1943-02-11 | Ig Farbenindustrie Ag | laundry detergent |
DE746569C (en) * | 1940-10-17 | 1944-12-14 | Ig Farbenindustrie Ag | Whitening agent for organic matter |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1150274B (en) * | 1959-03-21 | 1963-06-12 | Leonar Werke Ag | Process for the production of a photographic material with optical brighteners embedded in a diffusion-proof manner |
US3127270A (en) * | 1959-07-31 | 1964-03-31 | New stilbene compounds | |
DE3446962A1 (en) * | 1983-12-22 | 1985-07-04 | Fuji Photo Film Co., Ltd., Minami-Ashigara, Kanagawa | PHOTOGRAPHIC SILVER HALOGENIDE PRINT PAPER AND USE OF THE PAPER IN THE BLACK AND WHITE DEVELOPMENT PROCESS |
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