BE493464A - - Google Patents
Info
- Publication number
- BE493464A BE493464A BE493464DA BE493464A BE 493464 A BE493464 A BE 493464A BE 493464D A BE493464D A BE 493464DA BE 493464 A BE493464 A BE 493464A
- Authority
- BE
- Belgium
- Prior art keywords
- emulsion
- silver halide
- sensitivity
- emulsions
- addition
- Prior art date
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
- G03C1/005—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
Description
<Desc/Clms Page number 1>
"WERKWIJZE VOOR DE VERVAARDIGING VAN PHOTOGRAPHISCHE EMULSIES".
Deze uitvinding heeft betrekking op een werkwijze voor de ver- vaardiging van photographische emulsies en meer in het bijzonder op een werkwijze voor de vervaardiging van photographische zilverhalogenide emulsies met verhoogde lichtgevoeligheid.
Het is gekend de algemene gevoeligheid van photographische emul- sies op te drijven door het gebruik van meerwaardige anorganische basen, zoals bij voorbeeld stannaten, waarbij de gebruikte hoeveelheid basen zo is, dat naar alle waarschijnlijkheid de pH van de emulsie beinvloed wordt.
Wij hebben nu gevonden dat de algemene gevoeligheid van photo- graphische zilverhalogenide emulsies merkelijk kan opgedreven worden door toevoegen van kleine hoeveelheden anorganische of organische tinverbindin- gen zoals stannozouten (bij voorbeeld stannochloride), stannieten (bij voor- beeld natrium-stanniet), chlorotin (II) uur of chlorotin (IV) zuur en hun anorganische of organische zouten, dubbelzouten of complexen, zoals natri, um-chlorostanniet, chinoliniumchlorostanniet of pyridiniumchlorostannaat.
De toevoeging van de tinverbinding kan geschieden vóór, gedurende of na het rijpen van de emulsie.
Benevens de tinverbindingen volgens onderhavige uitvinding mag de emulsie tevens de gewone additie-producten bevatten, zoals verharders, stabilisatoren, spreidmiddelen, conserveermiddelen, chemische sensibilisa- toren, optische sensibilisatoren of supersensibiliserende combinaties.
Volgende voorbeelden illustreren de uitvinding zonder deze in het minst te beperken.
Voorbeeld 1 -
De gevoeligheid van een zilverbromo-iodide emulsie, die per kg emulsie 0,3 mol zilverhalogenide bevat, wordt merkelijk opgedreven door het gebruik van 5 mg/kg chinoliniumchlorostannieto
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Voorbeeld 2
De gevoeligheid van een zilverbromo-iodide emulsie, die per kg emulsie 0,3 mol zilverhalogenide bevat, wordt merkelijk opgedreven door het gebruik van 0,2 mg/kg chlorotin (II) zuur.
Voorbeeld 3 :
De gevoeligheid van een zilverbromo-iodide emulsie, die per kg emulsie 0,3 mol zilverhalogenide bevat, wordt merkelijk opgedreven door het gebruik van 0,5 mg/kg natriumstannieto Voorbeeld 4
De algemene gevoeligheid van een panchromatische zilverbromo- iodide emulsie die per kg emulsie 0,3 mol zilverhalogenide en 30 mg
EMI2.1
bis2(3methylbenzthiazol) alpha'mmethyltrnethinecyanine iodide bevat. wordt merkelijk opgedreven door het gebruik van 5 mg/kg chinoliniumchloro- stanniet.
<Desc / Clms Page number 1>
"PROCESS FOR THE MANUFACTURE OF PHOTOGRAPHIC EMULSIONS".
This invention relates to a process for the manufacture of photographic emulsions, and more particularly to a process for the manufacture of photographic silver halide emulsions having increased light sensitivity.
It is known to increase the general sensitivity of photographic emulsions by the use of polyvalent inorganic bases such as, for example, stannates, the amount of bases used being such that in all probability the pH of the emulsion is affected.
We have now found that the general sensitivity of photo-graphic silver halide emulsions can be markedly enhanced by the addition of small amounts of inorganic or organic tin compounds such as stannous salts (e.g. stannous chloride), stannites (e.g. sodium stannite), chlorotin ( II) hour or chlorotin (IV) acid and their inorganic or organic salts, double salts or complexes, such as sodium, um-chlorostannite, quinolinium chlorostannite or pyridinium chlorostannate.
The addition of the tin compound can be done before, during or after the aging of the emulsion.
In addition to the tin compounds of the present invention, the emulsion may also contain the common addition products such as hardeners, stabilizers, spreading agents, preservatives, chemical sensitizers, optical sensitizers, or super sensitizing combinations.
The following examples illustrate the invention without limiting it in the least.
Example 1 -
The sensitivity of a silver bromo-iodide emulsion, which contains 0.3 mol of silver halide per kg of emulsion, is noticeably increased by the use of 5 mg / kg of quinolinium chlorostannite.
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Example 2
The sensitivity of a silver bromo-iodide emulsion containing 0.3 mole silver halide per kg emulsion is markedly increased by the use of 0.2 mg / kg chlorotin (II) acid.
Example 3:
The sensitivity of a silver bromo-iodide emulsion containing 0.3 mole silver halide per kg of emulsion is markedly increased by the use of 0.5 mg / kg sodium stannite. Example 4
The general sensitivity of a panchromatic silver bromo-iodide emulsion containing 0.3 mole silver halide and 30 mg per kg of emulsion
EMI2.1
bis2 (3-methylbenzthiazole) alpha-methyltrnethinecyanine iodide. is noticeably boosted by the use of 5 mg / kg of quinolinium chlorostannite.
Claims (1)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
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BE493464T |
Publications (1)
Publication Number | Publication Date |
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BE493464A true BE493464A (en) |
Family
ID=3870651
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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BE493464D BE493464A (en) |
Country Status (1)
Country | Link |
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BE (1) | BE493464A (en) |
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0691578A2 (en) | 1994-03-22 | 1996-01-10 | Agfa-Gevaert N.V. | Imaging element and method for making a printing plate according to the silver salt diffusion transfer process |
EP0696758A1 (en) | 1994-08-10 | 1996-02-14 | Agfa-Gevaert AG | Light-sensitive photographique recording material containing a light absorbing dye |
EP0698822A2 (en) | 1994-08-22 | 1996-02-28 | Agfa-Gevaert N.V. | Lithographic printing plate precursor with a flexible support and method for making a lithographic printing plate therewith |
EP0745901A1 (en) | 1995-05-31 | 1996-12-04 | Agfa-Gevaert N.V. | A concentrated dampening solution with an improved shelf life for printing with a lithographic printing plate obtained according to the silver salt diffusion transfer process |
EP0774693A1 (en) | 1995-11-16 | 1997-05-21 | Agfa-Gevaert N.V. | A method for making by phototypesetting a lithographic printing plate according to the silver salt diffusion transfer process |
EP0779554A1 (en) | 1995-12-14 | 1997-06-18 | Agfa-Gevaert N.V. | A correcting liquid for a silver imaged lithographic printing plate |
EP0791858A1 (en) | 1996-02-26 | 1997-08-27 | Agfa-Gevaert N.V. | A method for making by phototypesetting a lithographic printing plate according to the silver salt diffusion transfer process |
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0
- BE BE493464D patent/BE493464A/nl unknown
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0691578A2 (en) | 1994-03-22 | 1996-01-10 | Agfa-Gevaert N.V. | Imaging element and method for making a printing plate according to the silver salt diffusion transfer process |
EP0696758A1 (en) | 1994-08-10 | 1996-02-14 | Agfa-Gevaert AG | Light-sensitive photographique recording material containing a light absorbing dye |
EP0698822A2 (en) | 1994-08-22 | 1996-02-28 | Agfa-Gevaert N.V. | Lithographic printing plate precursor with a flexible support and method for making a lithographic printing plate therewith |
EP0745901A1 (en) | 1995-05-31 | 1996-12-04 | Agfa-Gevaert N.V. | A concentrated dampening solution with an improved shelf life for printing with a lithographic printing plate obtained according to the silver salt diffusion transfer process |
EP0774693A1 (en) | 1995-11-16 | 1997-05-21 | Agfa-Gevaert N.V. | A method for making by phototypesetting a lithographic printing plate according to the silver salt diffusion transfer process |
EP0779554A1 (en) | 1995-12-14 | 1997-06-18 | Agfa-Gevaert N.V. | A correcting liquid for a silver imaged lithographic printing plate |
EP0791858A1 (en) | 1996-02-26 | 1997-08-27 | Agfa-Gevaert N.V. | A method for making by phototypesetting a lithographic printing plate according to the silver salt diffusion transfer process |
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