CH186864A - Process for the preparation of a photographically active body. - Google Patents
Process for the preparation of a photographically active body.Info
- Publication number
- CH186864A CH186864A CH186864DA CH186864A CH 186864 A CH186864 A CH 186864A CH 186864D A CH186864D A CH 186864DA CH 186864 A CH186864 A CH 186864A
- Authority
- CH
- Switzerland
- Prior art keywords
- cystine
- product
- active body
- unstable
- glycerine
- Prior art date
Links
- 238000000034 method Methods 0.000 title claims 2
- PEDCQBHIVMGVHV-UHFFFAOYSA-N Glycerine Chemical compound OCC(O)CO PEDCQBHIVMGVHV-UHFFFAOYSA-N 0.000 claims description 12
- LEVWYRKDKASIDU-QWWZWVQMSA-N D-cystine Chemical compound OC(=O)[C@H](N)CSSC[C@@H](N)C(O)=O LEVWYRKDKASIDU-QWWZWVQMSA-N 0.000 claims description 9
- 229960003067 cystine Drugs 0.000 claims description 9
- 235000011187 glycerol Nutrition 0.000 claims description 6
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 4
- MHAJPDPJQMAIIY-UHFFFAOYSA-N Hydrogen peroxide Chemical compound OO MHAJPDPJQMAIIY-UHFFFAOYSA-N 0.000 claims description 4
- YPWNNTBDMSIJIR-UHFFFAOYSA-N 14696-82-3 Chemical compound IN=[N+]=[N-] YPWNNTBDMSIJIR-UHFFFAOYSA-N 0.000 claims description 2
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 claims description 2
- FPVUYPVXGJAPNL-UHFFFAOYSA-N azane;oxosilver Chemical compound N.[Ag]=O FPVUYPVXGJAPNL-UHFFFAOYSA-N 0.000 claims description 2
- 238000006243 chemical reaction Methods 0.000 claims description 2
- 239000003153 chemical reaction reagent Substances 0.000 claims description 2
- 238000010438 heat treatment Methods 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 claims description 2
- 230000004048 modification Effects 0.000 claims description 2
- 238000012986 modification Methods 0.000 claims description 2
- 229910052757 nitrogen Inorganic materials 0.000 claims description 2
- 230000003647 oxidation Effects 0.000 claims description 2
- 238000007254 oxidation reaction Methods 0.000 claims description 2
- DHRLEVQXOMLTIM-UHFFFAOYSA-N phosphoric acid;trioxomolybdenum Chemical compound O=[Mo](=O)=O.O=[Mo](=O)=O.O=[Mo](=O)=O.O=[Mo](=O)=O.O=[Mo](=O)=O.O=[Mo](=O)=O.O=[Mo](=O)=O.O=[Mo](=O)=O.O=[Mo](=O)=O.O=[Mo](=O)=O.O=[Mo](=O)=O.O=[Mo](=O)=O.OP(O)(O)=O DHRLEVQXOMLTIM-UHFFFAOYSA-N 0.000 claims description 2
- 229910052717 sulfur Inorganic materials 0.000 claims description 2
- 239000011593 sulfur Substances 0.000 claims description 2
- 239000000839 emulsion Substances 0.000 description 3
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- 238000009835 boiling Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- WSFSSNUMVMOOMR-UHFFFAOYSA-N Formaldehyde Chemical compound O=C WSFSSNUMVMOOMR-UHFFFAOYSA-N 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 239000012153 distilled water Substances 0.000 description 1
- 229960004279 formaldehyde Drugs 0.000 description 1
- 235000019256 formaldehyde Nutrition 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 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
- G03C1/08—Sensitivity-increasing substances
- G03C1/10—Organic substances
Landscapes
- Physics & Mathematics (AREA)
- Chemical & Material Sciences (AREA)
- Spectroscopy & Molecular Physics (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- General Physics & Mathematics (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Description
verfahren zur Herstellung eines photographisch aktiven Körpers. Es ist bekannt, dass Cystin und Formol- cystin in verschiedenen photographischen Emulsionen die Gradation verbessern. Die Wirkung dieser Körper ist jedoch sehr emul- sionsabhängig. Ein wesentlich wirksamerer Körper, der in sehr vielen verschiedenartigen, photographischen Emulsionen wirksam ist, lässt sich aus Cystin erhalten, wenn man diesen Körper in Glyzerin durch Erhitzen in Lösung bringt, z. B. indem man ihn di- geriert und solange im kochenden Glyzerin belässt, bis er gelöst ist.
Die Glyzerinwirkung kann durch Variation der Temperatur und Zeit geändert werden. Der neue Körper kann durch Adsorption an Aktivkohle und späteres Ausziehen mit alkalischer Acetonlösung ge reinigt werden. Er hat unter anderem die Eigenschaft, photographische Entwickler zu konservieren, so dass sie langsamer unter dem Einfluss des Luftsauerstoffes oder des Gebrauches ermüden. <I>Beispiel:</I> Man digeriert 1 g Oystin in 50-100 em3 Glyzerin. Hierauf wird erwärmt bis zum Kochen, bezw. bis zur klaren Lösung des Cystins im Glyzerin.
Die entstehende Lö sung ist tiefbraun und wird zum Gebrauch mit destilliertem Wasser zweckentsprechend verdünnt.
Das neue Produkt ist ziemlich unbestän dig und kann nicht ohne Veränderung trok- ken eingedampft werden, da leicht Oxyda tion eintritt, ohne dass allerdings die wert vollen photographischen Eigenschaften da durch wesentlich verändert würden. Das mit Wasserstoffsuperoxyd behandelte Produkt desensibilisiert photographische Schichten weniger als das frische, nicht oxydierte Pro dukt. Es gibt im Gegensatz zum Cystin die Phosphormolybdänsäurereaktion, zeigt also in gewissem Sinne eiweissartiges Verhalten.
Mit dem Feiglschen Jodazidreagens erhält man starke Stickstoffentwicklung, was auf ziemlich labilen Schwefel hinweist. Die Ent schwefelung mit Silberoxydammoniak erfolgt viel leichter als beim Cystin.
method for producing a photographically active body. It is known that cystine and formol cystine improve gradation in various photographic emulsions. However, the effect of these bodies is very emulsion-dependent. A much more effective body, which is effective in a very wide variety of photographic emulsions, can be obtained from cystine if this body is brought into solution in glycerine by heating, e.g. B. by dividing it and leaving it in the boiling glycerine until it is dissolved.
The effect of glycerine can be changed by varying the temperature and time. The new body can be cleaned by adsorption on activated charcoal and later undressing with alkaline acetone solution. Among other things, it has the property of preserving photographic developers so that they tire more slowly under the influence of atmospheric oxygen or use. <I> Example: </I> 1 g of oystine is digested in 50-100 em3 of glycerine. This is heated to boiling, respectively. to the clear solution of the cystine in the glycerine.
The resulting solution is deep brown and is appropriately diluted with distilled water for use.
The new product is rather unstable and cannot be evaporated dry without modification, since oxidation easily occurs without, however, significantly changing the valuable photographic properties. The product treated with hydrogen peroxide desensitizes photographic layers less than the fresh, unoxidized product. In contrast to cystine, there is the phosphomolybdic acid reaction, so in a certain sense it shows protein-like behavior.
With Feigl's iodine azide reagent, strong nitrogen evolution is obtained, which indicates rather unstable sulfur. The desulphurisation with silver oxide ammonia is much easier than with cystine.
Claims (1)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CH186864T | 1935-09-14 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CH186864A true CH186864A (en) | 1936-10-15 |
Family
ID=4434648
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CH186864D CH186864A (en) | 1935-09-14 | 1935-09-14 | Process for the preparation of a photographically active body. |
Country Status (1)
| Country | Link |
|---|---|
| CH (1) | CH186864A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2438716A (en) * | 1944-10-06 | 1948-03-30 | Gen Aniline & Film Corp | Stabilized silver halide emulsions |
| US2449153A (en) * | 1944-04-03 | 1948-09-14 | Urbach Franz | Photographic silver bromide emulsion sensitized with cysteine |
| US2699391A (en) * | 1950-01-11 | 1955-01-11 | Gen Aniline & Film Corp | Synthetic polypeptides of alpha-amino acids as restrainers in photographic emulsions |
-
1935
- 1935-09-14 CH CH186864D patent/CH186864A/en unknown
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2449153A (en) * | 1944-04-03 | 1948-09-14 | Urbach Franz | Photographic silver bromide emulsion sensitized with cysteine |
| US2438716A (en) * | 1944-10-06 | 1948-03-30 | Gen Aniline & Film Corp | Stabilized silver halide emulsions |
| US2699391A (en) * | 1950-01-11 | 1955-01-11 | Gen Aniline & Film Corp | Synthetic polypeptides of alpha-amino acids as restrainers in photographic emulsions |
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