US1713613A - Combined desensitizer and developer and process of desensitizing and developing - Google Patents
Combined desensitizer and developer and process of desensitizing and developing Download PDFInfo
- Publication number
- US1713613A US1713613A US218365A US21836527A US1713613A US 1713613 A US1713613 A US 1713613A US 218365 A US218365 A US 218365A US 21836527 A US21836527 A US 21836527A US 1713613 A US1713613 A US 1713613A
- Authority
- US
- United States
- Prior art keywords
- developer
- developing
- desensitizing
- cyanide
- desensitizer
- 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 - Lifetime
Links
- 238000000034 method Methods 0.000 title description 6
- 229940090898 Desensitizer Drugs 0.000 title description 3
- 229910001385 heavy metal Inorganic materials 0.000 description 7
- XFXPMWWXUTWYJX-UHFFFAOYSA-N Cyanide Chemical compound N#[C-] XFXPMWWXUTWYJX-UHFFFAOYSA-N 0.000 description 6
- 239000003795 chemical substances by application Substances 0.000 description 5
- 239000000463 material Substances 0.000 description 4
- FQGYCXFLEQVDJQ-UHFFFAOYSA-N mercury dicyanide Chemical compound N#C[Hg]C#N FQGYCXFLEQVDJQ-UHFFFAOYSA-N 0.000 description 4
- 239000000203 mixture Substances 0.000 description 3
- 150000002825 nitriles Chemical class 0.000 description 3
- 229910052709 silver Inorganic materials 0.000 description 3
- 239000004332 silver Substances 0.000 description 3
- -1 silver halide Chemical class 0.000 description 3
- RTKMFQOHBDVEBC-UHFFFAOYSA-N 3-bromo-3-buten-1-ol Chemical compound OCCC(Br)=C RTKMFQOHBDVEBC-UHFFFAOYSA-N 0.000 description 2
- QIGBRXMKCJKVMJ-UHFFFAOYSA-N Hydroquinone Chemical compound OC1=CC=C(O)C=C1 QIGBRXMKCJKVMJ-UHFFFAOYSA-N 0.000 description 2
- 238000005286 illumination Methods 0.000 description 2
- 229940075610 mercuric cyanide Drugs 0.000 description 2
- CYXJEHCKVOQFOV-UHFFFAOYSA-N (4-amino-2-methylphenyl) hydrogen sulfate Chemical compound CC1=CC(N)=CC=C1OS(O)(=O)=O CYXJEHCKVOQFOV-UHFFFAOYSA-N 0.000 description 1
- 241001479434 Agfa Species 0.000 description 1
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 description 1
- NHMJUOSYSOOPDM-UHFFFAOYSA-N cadmium cyanide Chemical compound [Cd+2].N#[C-].N#[C-] NHMJUOSYSOOPDM-UHFFFAOYSA-N 0.000 description 1
- 229910017052 cobalt Inorganic materials 0.000 description 1
- 239000010941 cobalt Substances 0.000 description 1
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 description 1
- 230000003467 diminishing effect Effects 0.000 description 1
- QSHDDOUJBYECFT-UHFFFAOYSA-N mercury Chemical compound [Hg] QSHDDOUJBYECFT-UHFFFAOYSA-N 0.000 description 1
- 229910052753 mercury Inorganic materials 0.000 description 1
- 229910021653 sulphate ion Inorganic materials 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
- G03C5/00—Photographic processes or agents therefor; Regeneration of such processing agents
- G03C5/26—Processes using silver-salt-containing photosensitive materials or agents therefor
- G03C5/32—Latensification; Densensitisation
Definitions
- HERBERT MEYER 01' BEBLIN-TBEPTOW, GERMANY, ASSIGNOB, 3T KESNE ASSIGN- I IENTS, TO AGFA ANSOO CORPORATION, 01' BINGHAITON, NEW YORK, A CORPORA- TION or NEW Yoax.
- the present invention relates to new photographic developers, more particularly to photographic developers comprising the cyanide of a heavy metal. It relates further- 5 more to the process of developing photographic surfaces with the aid of-the new devclopers.
- the cyanides of the heavy metals act as good 'desensitizers when added to a photographic developing agent i. e. their presence in the developing agent permits photographic surfaces to be developed either wholly or in greater part in full light without diminishing the latent image.
- the cyanides of the heavy metals have the advantage that they do not color the developer, or the developed sensitive materials. In addition they remain active for a much longer time in concentrated developing solutions for example, in concentrated hydroquinonedevelopers;
- mercur cyanide which is especially eflicient
- t e eyanides of the other heavy metals may be used also, as for instance cobalt or cadmium-cyanide, al-
- Eaiample 2 A monomethyl-para-aminophenolsulphate-hydroquinone developer, in which the exposed material to be developed would acquire a considerable fog as the cf fect of 10 minutes development, receives an addition of 0.3 gram of mercuric cyanide per 1000 cc. of developer. The same material may now be developed under normal dark room illumination in this develo r contain ing cyanide for 20-50 minutes without showing appreciable fog after fixing.
- compositions of matter photographic developers comprising theeyanide of a heavy metal.
- a process of desensitizlng ing exposed silver halide sensitized elements which comprises subjecting them to the action of aticiandevelo'per containing mercury cyanide.
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Silver Salt Photography Or Processing Solution Therefor (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DEI0029507 | 1926-11-13 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| US1713613A true US1713613A (en) | 1929-05-21 |
Family
ID=7187341
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US218365A Expired - Lifetime US1713613A (en) | 1926-11-13 | 1927-09-08 | Combined desensitizer and developer and process of desensitizing and developing |
Country Status (4)
| Country | Link |
|---|---|
| US (1) | US1713613A (enrdf_load_stackoverflow) |
| BE (1) | BE344630A (enrdf_load_stackoverflow) |
| FR (1) | FR641409A (enrdf_load_stackoverflow) |
| GB (1) | GB280525A (enrdf_load_stackoverflow) |
-
0
- BE BE344630D patent/BE344630A/xx unknown
-
1927
- 1927-09-08 US US218365A patent/US1713613A/en not_active Expired - Lifetime
- 1927-09-26 FR FR641409D patent/FR641409A/fr not_active Expired
- 1927-10-31 GB GB29011/27A patent/GB280525A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| FR641409A (fr) | 1928-08-03 |
| BE344630A (enrdf_load_stackoverflow) | |
| GB280525A (enrdf_load_stackoverflow) | 1928-02-16 |
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