US2512721A - Silver halide photographic emulsions containing a blue black toner - Google Patents
Silver halide photographic emulsions containing a blue black toner Download PDFInfo
- Publication number
- US2512721A US2512721A US768498A US76849847A US2512721A US 2512721 A US2512721 A US 2512721A US 768498 A US768498 A US 768498A US 76849847 A US76849847 A US 76849847A US 2512721 A US2512721 A US 2512721A
- Authority
- US
- United States
- Prior art keywords
- emulsion
- silver halide
- black toner
- halide photographic
- photographic emulsions
- 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
- 239000000839 emulsion Substances 0.000 title claims description 29
- 239000004332 silver Substances 0.000 title description 5
- 229910052709 silver Inorganic materials 0.000 title description 5
- -1 Silver halide Chemical class 0.000 title description 4
- 150000001875 compounds Chemical class 0.000 claims description 19
- 229910021607 Silver chloride Inorganic materials 0.000 claims description 14
- HKZLPVFGJNLROG-UHFFFAOYSA-M silver monochloride Chemical compound [Cl-].[Ag+] HKZLPVFGJNLROG-UHFFFAOYSA-M 0.000 claims description 14
- 239000002253 acid Substances 0.000 claims description 8
- 229910052500 inorganic mineral Inorganic materials 0.000 claims description 8
- 239000011707 mineral Substances 0.000 claims description 8
- 150000003839 salts Chemical class 0.000 claims description 8
- 150000002537 isoquinolines Chemical class 0.000 claims description 2
- FVVXWRGARUACNW-UHFFFAOYSA-N 3-methylisoquinoline Chemical compound C1=CC=C2C=NC(C)=CC2=C1 FVVXWRGARUACNW-UHFFFAOYSA-N 0.000 description 6
- 230000000694 effects Effects 0.000 description 4
- DTBDAFLSBDGPEA-UHFFFAOYSA-N 3-Methylquinoline Natural products C1=CC=CC2=CC(C)=CN=C21 DTBDAFLSBDGPEA-UHFFFAOYSA-N 0.000 description 3
- LOUPRKONTZGTKE-WZBLMQSHSA-N Quinine Chemical class C([C@H]([C@H](C1)C=C)C2)C[N@@]1[C@@H]2[C@H](O)C1=CC=NC2=CC=C(OC)C=C21 LOUPRKONTZGTKE-WZBLMQSHSA-N 0.000 description 3
- 238000007792 addition Methods 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 2
- AWJUIBRHMBBTKR-UHFFFAOYSA-N iso-quinoline Natural products C1=NC=CC2=CC=CC=C21 AWJUIBRHMBBTKR-UHFFFAOYSA-N 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000007935 neutral effect Effects 0.000 description 2
- 239000004215 Carbon black (E152) Substances 0.000 description 1
- 108010010803 Gelatin Proteins 0.000 description 1
- 239000004952 Polyamide Substances 0.000 description 1
- 239000004372 Polyvinyl alcohol Substances 0.000 description 1
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 1
- 150000001241 acetals Chemical class 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 125000003545 alkoxy group Chemical group 0.000 description 1
- 239000011230 binding agent Substances 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- QAOWNCQODCNURD-UHFFFAOYSA-M bisulphate group Chemical group S([O-])(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-M 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000002508 contact lithography Methods 0.000 description 1
- 239000013068 control sample Substances 0.000 description 1
- 235000014113 dietary fatty acids Nutrition 0.000 description 1
- 235000019441 ethanol Nutrition 0.000 description 1
- 229930195729 fatty acid Natural products 0.000 description 1
- 239000000194 fatty acid Substances 0.000 description 1
- 150000004665 fatty acids Chemical class 0.000 description 1
- 229920000159 gelatin Polymers 0.000 description 1
- 239000008273 gelatin Substances 0.000 description 1
- 235000019322 gelatine Nutrition 0.000 description 1
- 235000011852 gelatine desserts Nutrition 0.000 description 1
- 229910052736 halogen Inorganic materials 0.000 description 1
- 150000002367 halogens Chemical class 0.000 description 1
- 229930195733 hydrocarbon Natural products 0.000 description 1
- 150000002430 hydrocarbons Chemical class 0.000 description 1
- 150000003840 hydrochlorides Chemical class 0.000 description 1
- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 125000000449 nitro group Chemical group [O-][N+](*)=O 0.000 description 1
- 125000001997 phenyl group Chemical group [H]C1=C([H])C([H])=C(*)C([H])=C1[H] 0.000 description 1
- SUSQOBVLVYHIEX-UHFFFAOYSA-N phenylacetonitrile Chemical compound N#CCC1=CC=CC=C1 SUSQOBVLVYHIEX-UHFFFAOYSA-N 0.000 description 1
- 229920002647 polyamide Polymers 0.000 description 1
- 229920002451 polyvinyl alcohol Polymers 0.000 description 1
- 125000002924 primary amino group Chemical group [H]N([H])* 0.000 description 1
- GGCZERPQGJTIQP-UHFFFAOYSA-N sodium;9,10-dioxoanthracene-2-sulfonic acid Chemical compound [Na+].C1=CC=C2C(=O)C3=CC(S(=O)(=O)O)=CC=C3C(=O)C2=C1 GGCZERPQGJTIQP-UHFFFAOYSA-N 0.000 description 1
- 229920001059 synthetic polymer Polymers 0.000 description 1
- 229920003002 synthetic resin Polymers 0.000 description 1
- 239000000057 synthetic resin Substances 0.000 description 1
- 229920002554 vinyl polymer Polymers 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
- G03C1/35—Antiplumming agents, i.e. antibronzing agents; Toners
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S430/00—Radiation imagery chemistry: process, composition, or product thereof
- Y10S430/166—Toner containing
Definitions
- This invention relates to silver halide photographic emulsions and particularly to gelatino silver chloride photographic emulsions such as are used in development papers for contact printing, i. e. the so-called gaslight printing papers.
- the colour of developed images obtained from gelatino silver chloride development emulsions can be controlled to some extent by the addition of certain substances to the emulsion or to the developer.
- the developed images may vary from a greenish to a fairly neutral black. It is generally preferred that the developed images should be on the bluer side of neutral black rather than on the greener side, and various suggestions have hitherto been made for obtaining the desired blue-black images.
- a quinine salt which has the effect of yielding developed images of a good blue-black colour.
- Many compounds have been sug ested as developer additions for the same purpose, but from both manufacturers and users standpoints, it is better to include the blue-black toning substance in the emulsion during its manufacture since, the products can then be developed with standard developers.
- silver chloride emulsions which yield images of excellent blue-black colour on development are obtained by including in the emulsion, not later than the stage at which the emulsion is developed and preferably during its manufacture, a 3-alkyl isoquinoline or a mineral acid salt of such compound.
- the compound B-methyl isoquinoline and its homologues can be prepared from orthocyan benzyl cyanide and an appropriate fatty acid anhydride (Gabriel and Neumann, Berichte, 25,
- Analogous compounds in which the benzene ring is substituted e. g. by hydrocarbon, alkoxy, hydroxy, halogen, nitro or amino, may also be employed.
- the compounds can be used either as the free bases or as mineral acid salts.
- the compounds may be used as the hydrochlorides or bisulphates.
- Example A gelatino silver chloride emulsion of the gaslight type was prepared and to a portion of it was added 3-methyl isoquinoline at the rate of 5 cos. of a 5% solution of the compound in ethyl alcohol per pound of emulsion.
- a control sample containing quinine bisulphate as the blue-black toning agent was also prepared. The samples were coated on paper base, exposed, developed in a standard metol-hydroquinone developer, and the photographic properties of the images obtained were studied.
- silver chloride photographic emulsion means a photographic emulsion in which the predominant silver salt is silver chloride and includes the possibility of a small proportion of other silver halide being present.
- the binding agent for the silver chloride may be gelatin or any water-permeable synthetic resin or polymer, e. g. polyvinyl alcohol, polyvinyl acetals, synthetic linear polyamides, and the like.
- a photographic element comprising a support and a layer of a gelatino silver chloride photographic emulsion containing a compound selected from the class consisting of 3-alkyl isoquinolines and strong mineral acid salts thereof.
- a photographic element comprising a paper support and a layer of a gelatino silver chloride 4 photographic emulsion containing a compound selected from the class consisting of 3-alky1 isoquinolines and strong mineral acid salts thereof.
Description
Patented June 27, 1950 SILVER HALIDE PHOTOGRAPHIO EMUL SIONS CONTAINING A BLUE BLACK TONER John David Kendall and Douglas James Fry, Ilford, England, assignors 'to vIlford Limited, Ilford, England, a British company 3 j No Drawing. Application August 113.1947, Serial No. 768,498. In Great Britain August 20,- 1946 1 6 Claims. (Cl. 9 6) This invention relates to silver halide photographic emulsions and particularly to gelatino silver chloride photographic emulsions such as are used in development papers for contact printing, i. e. the so-called gaslight printing papers.
It is well known that the colour of developed images obtained from gelatino silver chloride development emulsions can be controlled to some extent by the addition of certain substances to the emulsion or to the developer. In the absence of any special additions the developed images may vary from a greenish to a fairly neutral black. It is generally preferred that the developed images should be on the bluer side of neutral black rather than on the greener side, and various suggestions have hitherto been made for obtaining the desired blue-black images. Thus it is known to include in the emulsion a small quantity of a quinine salt, which has the effect of yielding developed images of a good blue-black colour. Many compounds have been sug ested as developer additions for the same purpose, but from both manufacturers and users standpoints, it is better to include the blue-black toning substance in the emulsion during its manufacture since, the products can then be developed with standard developers.
According to the present invention silver chloride emulsions which yield images of excellent blue-black colour on development are obtained by including in the emulsion, not later than the stage at which the emulsion is developed and preferably during its manufacture, a 3-alkyl isoquinoline or a mineral acid salt of such compound.
The compound B-methyl isoquinoline and its homologues can be prepared from orthocyan benzyl cyanide and an appropriate fatty acid anhydride (Gabriel and Neumann, Berichte, 25,
3563). Examples of such compounds which can be used according to this invention are:
3-methyl isoquinoline, M. pt 68 C. 3-ethyl isoquinoline, B. pt 256 C. 3-propyl isoquinoline, B. pt 271 C. 3-isopropyl isoquinoline, B. pt 266 C. B-isobutyl isoquinoline, B. pt 278 C.
Analogous compounds in which the benzene ring is substituted, e. g. by hydrocarbon, alkoxy, hydroxy, halogen, nitro or amino, may also be employed.
As indicated above, the compounds can be used either as the free bases or as mineral acid salts. Thus, for example, the compounds may be used as the hydrochlorides or bisulphates.
The proportion of compound added to the used and on the precise nature of the emulsion. In general a good blue-black tone can be obtained using the compounds of this invention in proportions of the order of 25 cos. of a 1% solution of the compound per pound of liquid emulsion ready for coating, though lower proportions or higher proprtions can be used, e. g. of the order of 5 to cos. of a 1% solution per pound of emulsion. Smaller quantities of proportionately stronger solutions may be used if desired.
Many substances when added to photographic emulsions have undesirable effects on the qualities of an emulsion, i. e. loss of speed, increased tendency to the formation of fog (i. e. developed silver not arising from the exposure) and on the contrast of the developed images. It is a particular merit of the compounds used as blue-black toners according to the present invention that they do not have any serious adverse effect in respect of any of these properties.
The following example illustrates the invention:
Example A gelatino silver chloride emulsion of the gaslight type was prepared and to a portion of it was added 3-methyl isoquinoline at the rate of 5 cos. of a 5% solution of the compound in ethyl alcohol per pound of emulsion. A control sample containing quinine bisulphate as the blue-black toning agent was also prepared. The samples were coated on paper base, exposed, developed in a standard metol-hydroquinone developer, and the photographic properties of the images obtained were studied.
It was found that the added compound was as effective as quinine bisulphate in imparting a blue-black tone to the developed image, and that the compound had no appreciable effect on the other properties of the emulsion.
It is to be understood that in the foregoing description and in the following claims the expression silver chloride photographic emulsion means a photographic emulsion in which the predominant silver salt is silver chloride and includes the possibility of a small proportion of other silver halide being present. The binding agent for the silver chloride may be gelatin or any water-permeable synthetic resin or polymer, e. g. polyvinyl alcohol, polyvinyl acetals, synthetic linear polyamides, and the like.
What we claim is:
1. A silver chloride photographic emulsion containing a compound selected from the class con- 3 sisting of 3-alkyl isoquinolines and strong mineral acid salts thereof.
2. A gelatino silver chloride photographic emulsion containing 3-methyl isoquinoline.
3. A gelatino silver chloride photographic emulsion containing a strong mineral acid salt of 3-methyl isoquinoline.
4. A gelatino silver chloride emulsion containing a compound selected from the class consisting of 3-alkyl isoquinolines andstrong mineral acid salts thereof in a proportion of 0.5 to 0.05 gm. per pound of emulsion.
5. A photographic element comprising a support and a layer of a gelatino silver chloride photographic emulsion containing a compound selected from the class consisting of 3-alkyl isoquinolines and strong mineral acid salts thereof.
6. A photographic element comprising a paper support and a layer of a gelatino silver chloride 4 photographic emulsion containing a compound selected from the class consisting of 3-alky1 isoquinolines and strong mineral acid salts thereof.
JOHN DAVID KENDALL. DOUGLAS JAMES FRY.
REFERENCES CITED The following references are of record in th file ofv this patent:
UNITED STATES PATENTS Number Name Date 2,124,159 Weyde July 19, 1938 2,334,864 Carroll et a1 Nov. 23, 1943 2,398,778 Carroll et a1 Apr. 23, 1946 OTHER REFERENCES Handbook of Photography Henney and Dudley (1939) 'McGraw Hill 00., pp. cited p. 326, p. 345.
Claims (1)
- 4. A GELATINO SILVER CHLORIDE EMULSION CONTAINING A COMPOUND SELECTED FROM THE CLASS CONSISTING OF 3-ALKYL ISOQUINOLINES AND STRONG MINERAL ACID SALTS THEREOF INA PROPORTION OF 0.5 TO 0.05 GM. PER POUND OF EMULSION.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB24736/46A GB615880A (en) | 1946-08-20 | 1946-08-20 | Improvements in or relating to silver halide photographic emulsions |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| US2512721A true US2512721A (en) | 1950-06-27 |
Family
ID=10216443
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US768498A Expired - Lifetime US2512721A (en) | 1946-08-20 | 1947-08-13 | Silver halide photographic emulsions containing a blue black toner |
Country Status (2)
| Country | Link |
|---|---|
| US (1) | US2512721A (en) |
| GB (1) | GB615880A (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2124159A (en) * | 1933-05-24 | 1938-07-19 | Agfa Ansco Corp | Method of increasing the brilliancy of photographic pictures, and composition therefor |
| US2334864A (en) * | 1942-02-02 | 1943-11-23 | Eastman Kodak Co | Photographic emulsion |
| US2398778A (en) * | 1942-11-24 | 1946-04-23 | Eastman Kodak Co | Sensitized photographic emulsion |
-
1946
- 1946-08-20 GB GB24736/46A patent/GB615880A/en not_active Expired
-
1947
- 1947-08-13 US US768498A patent/US2512721A/en not_active Expired - Lifetime
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2124159A (en) * | 1933-05-24 | 1938-07-19 | Agfa Ansco Corp | Method of increasing the brilliancy of photographic pictures, and composition therefor |
| US2334864A (en) * | 1942-02-02 | 1943-11-23 | Eastman Kodak Co | Photographic emulsion |
| US2398778A (en) * | 1942-11-24 | 1946-04-23 | Eastman Kodak Co | Sensitized photographic emulsion |
Also Published As
| Publication number | Publication date |
|---|---|
| GB615880A (en) | 1949-01-12 |
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