US2352822A - Photographic coating - Google Patents
Photographic coating Download PDFInfo
- Publication number
- US2352822A US2352822A US429280A US42928042A US2352822A US 2352822 A US2352822 A US 2352822A US 429280 A US429280 A US 429280A US 42928042 A US42928042 A US 42928042A US 2352822 A US2352822 A US 2352822A
- Authority
- US
- United States
- Prior art keywords
- emulsion
- coating
- dyes
- photographic
- light
- 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
- 238000000576 coating method Methods 0.000 title description 24
- 239000011248 coating agent Substances 0.000 title description 22
- 239000000839 emulsion Substances 0.000 description 31
- 239000000975 dye Substances 0.000 description 19
- 230000035945 sensitivity Effects 0.000 description 8
- CPELXLSAUQHCOX-UHFFFAOYSA-M Bromide Chemical compound [Br-] CPELXLSAUQHCOX-UHFFFAOYSA-M 0.000 description 7
- 229910052709 silver Inorganic materials 0.000 description 7
- 239000004332 silver Substances 0.000 description 7
- 230000003595 spectral effect Effects 0.000 description 7
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 description 6
- -1 silver ions Chemical class 0.000 description 6
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 4
- 229910021607 Silver chloride Inorganic materials 0.000 description 4
- DZBUGLKDJFMEHC-UHFFFAOYSA-N acridine Chemical compound C1=CC=CC2=CC3=CC=CC=C3N=C21 DZBUGLKDJFMEHC-UHFFFAOYSA-N 0.000 description 4
- HKZLPVFGJNLROG-UHFFFAOYSA-M silver monochloride Chemical compound [Cl-].[Ag+] HKZLPVFGJNLROG-UHFFFAOYSA-M 0.000 description 4
- 229940090898 Desensitizer Drugs 0.000 description 3
- 230000011514 reflex Effects 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 229910002651 NO3 Inorganic materials 0.000 description 2
- NHNBFGGVMKEFGY-UHFFFAOYSA-N Nitrate Chemical compound [O-][N+]([O-])=O NHNBFGGVMKEFGY-UHFFFAOYSA-N 0.000 description 2
- XYFCBTPGUUZFHI-UHFFFAOYSA-N Phosphine Chemical compound P XYFCBTPGUUZFHI-UHFFFAOYSA-N 0.000 description 2
- SJOOOZPMQAWAOP-UHFFFAOYSA-N [Ag].BrCl Chemical compound [Ag].BrCl SJOOOZPMQAWAOP-UHFFFAOYSA-N 0.000 description 2
- 239000000999 acridine dye Substances 0.000 description 2
- 229910052736 halogen Inorganic materials 0.000 description 2
- 150000002367 halogens Chemical class 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 238000001228 spectrum Methods 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 1
- 241000009298 Trigla lyra Species 0.000 description 1
- PEJLNXHANOHNSU-UHFFFAOYSA-N acridine-3,6-diamine;10-methylacridin-10-ium-3,6-diamine;chloride Chemical compound [Cl-].C1=CC(N)=CC2=NC3=CC(N)=CC=C3C=C21.C1=C(N)C=C2[N+](C)=C(C=C(N)C=C3)C3=CC2=C1 PEJLNXHANOHNSU-UHFFFAOYSA-N 0.000 description 1
- 230000006978 adaptation Effects 0.000 description 1
- CODNYICXDISAEA-UHFFFAOYSA-N bromine monochloride Chemical compound BrCl CODNYICXDISAEA-UHFFFAOYSA-N 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 238000002508 contact lithography Methods 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 230000002542 deteriorative effect Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- 230000002045 lasting effect Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 125000001997 phenyl group Chemical group [H]C1=C([H])C([H])=C(*)C([H])=C1[H] 0.000 description 1
- 229910000073 phosphorus hydride Inorganic materials 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 230000001235 sensitizing effect Effects 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances 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
- G03C1/102—Organic substances dyes other than methine dyes
Definitions
- This invention relates to a photographic light sensitive coating and has for its object to aflord an, improved coating particularly adapted for photographic enlarging Paper, contact printing paper. and reflex copy P p r.
- the "invention is to afford a properly'completing a given exposure on enlarging paper and which a high degree of sensitivity when exposed. to light within the gen-* coating requiring less time than heretofore for x OFFICE a'ssignor to heater, N. Y a cor- Application February 2, 1942, Serial No. 429,280 I coating after storage and maintaining its efll-, clency regardless of its age.
- -It is a further purpose of the. invention to provide a coating sensitized with'a dye that gives the best range for color sensitivity preferably between 4400 and 5200 angstromathus affording. a more selective color control, and which also greatly reduces the exposure time required witheralregion of the spectrum comprehended between 4400 and: 5200 angstroms, 'the spectral wave light region within which the light most' generally used for photographic exposures has a highly satisfactory actinic value.
- Another purpose of the invention is to ailord acoating with extreme sensitivity in the'spectral region within which the more eilicient results are had for most color separation work.
- a further object of the invention is to aiford a coating containing a dye that is not sensitive to the pH value of an emulsion and does not lose sensitivity in the presence of halogen andfree silver ions but is stable and influenced very little by such factors so that instead of impairing the stability or keeping qualities of the emulsion as is thecase with dyes heretofore used, it has the further advantage of improving the character and lasting qualities of theemulsion.
- An additional object of the invention is to ime prove the results obtained-with as well as the quality of reflexcopy paper which is exposed ina contact printer with the coated side out and the subject to be'copied is placed face down against the coating, with a light source arranged todirect light through'the coated light sensitive Piper on to the subject to be copied, the light being absorbed by the printed portions and reiiected back on to the light sensitive coating where it strikes anunprintedor white portion.
- Another object of the invention' is to afiord a coating for photographic papers containing a
- An additional object of the invention is af ford a chloride emulsion coating-having an exposure speed as fast as that of a bromid emulslon while retaining the desirable advantages of the chloride emulsion.
- the purposes of the invention may be accomplished with a silver chloride emulsion, or a sil-. ver' bromo-chloride emulsion containing approx imately one-third to one-half bromide and twothirds to one-half chloride, by dding the dye 7 solution to the emulsion either during the mixing process at' any time after the silver halide: is formed, or shortly before the emulsion is coated on the paper or support.
- the dye solution may consist of' one part of dye to one thousand or two thousand partsof solvent, either water tion a desensitiser, the function or which is to desensltize the emulsion so, asto slow down its fi m-speed andmak poesibletheuseofsuch a paper or alcohol, and satisfactory results I have been obtained by adding: 0.1 to 02 gram of such a dye solution to approximately forty pounds of Dyes which have been found is cllEiCNfikNOi, acridine orang 01' tetra-i in subdued daylightbut a desensitizer has a practical disadvantage since its desensitiring action on the flexcopy P per thatwill attain etmallys d'and v the of a thus preventing deterioration the coating and renders it unfit fol-successful use after it has been stored for a length of time, and itis an additional; purpose of the invention to afford a remethyl diamino a
- the dyes herein disclosed enable the manufacture of coatings that are particularly adapted to color photography work by giving a fast exposure speed within the general spectral region from 4400 to 5200 angstroms.
- Spectrograms made from coatings sensitized with acriflavin, phosphine, and acridine' orange show high speed sensitivity at 4400 to 4800 angstroms, 4600 to 5200 angstroms, and 4400 to 5200 angstroms respectively, all within the spectral region that is best adapted to color separation work.
- the dyes disclosed owing to their exposure speed, permit the use of a slow emulsion and hence one of low silver content, thus reducing cost particularly in the case of contact papers.
- the dyes disclosed are stable as against the pH value of an emulsion or the halogen and free silver ions which it contains and have no deteriorating influence on the coating, the emv ciency of which is not reduced or impaired with age, but on the contrary, the quality of the coating appears to be improved by the dye, so that no fogging is present and the photographic results are excellent.
- the dyes disclosed are of low cost, simple to produce, easily obtainable commercially, and they can be incorporated readily in the emulsion owing to their chemical nature. They impart to the coating of enlarging paper a fasterspeed relatively to the natural emulsion than dyes heretofore used for this purpose, and help to give the necessary keeping quality to the emulsion that is required for practical requirements.
- the results obtained are substantially better both as to the image obtained and the stability of the coating than enlarging papers heretofore obtainable, and when used for contact papers, an emulsion with a lower silver content than heretofore can be employed without aifecting the resulting image.
- the ease of handling and other advantages that characterize a chloride emulsion are had while retaining the speed of a bromide emulsion but without any of the undesirable characteristics of the latter.
- a photographic coating which can be exposed for printing in subdued daylight under Mazda light and contains one of the group of emulsions consisting of silver chloride emulsion, and silver bromo-chlorlde emulsion containing approximately one-third to one-half bromide and two-thirds to one-half chloride, and an acridine dye which enhances the keeping power of the emulsion and imparts to the coating high speed sensitivity confined within the spectral region between not less than 4400 angstroms and not more than 5200 angstroms.
- a photographic coating which can be exposed for printing in subdued daylight under Mazda light and contains one of the group of emulsions consisting of silver chloride emulsion,
- silver bromo-chloride emulsion containing approximately one-third to one-half bromide and two-thirds to one-half chloride, and oneof the group of dyes consisting of chrysanilin nitrate, tetramethyl diamino acridin chlorhydrat, and diamino methyl acridiniumchlorid-chlorhydrat, which enhances the keeping power of the emulsion and imparts to the coating high speed sensitivity confined within the spectral region between not less than 4400 angstroms and not more than '5200 angstroms.
Description
' better Photographic rmuits without Prensa July 4, 1944 UNITED STATE 5 PATENT 2.352322 PHOTOGRAPH) COATING.
. John Dessauer, lrondequoit, N. Y.,
I The Haloid Company, Roe
poration of New York 'No Drawing.
2 Claims. (Cl. 95-1) This inventionrelates to a photographic light sensitive coating and has for its object to aflord an, improved coating particularly adapted for photographic enlarging Paper, contact printing paper. and reflex copy P p r.
One purpose of: the "invention is to afford a properly'completing a given exposure on enlarging paper and which a high degree of sensitivity when exposed. to light within the gen-* coating requiring less time than heretofore for x OFFICE a'ssignor to heater, N. Y a cor- Application February 2, 1942, Serial No. 429,280 I coating after storage and maintaining its efll-, clency regardless of its age.
-It is a further purpose of the. invention to provide a coating sensitized with'a dye that gives the best range for color sensitivity preferably between 4400 and 5200 angstromathus affording. a more selective color control, and which also greatly reduces the exposure time required witheralregion of the spectrum comprehended between 4400 and: 5200 angstroms, 'the spectral wave light region within which the light most' generally used for photographic exposures has a highly satisfactory actinic value.
Another purpose of the invention is to ailord acoating with extreme sensitivity in the'spectral region within which the more eilicient results are had for most color separation work.
A further object of the invention is to aiford a coating containing a dye that is not sensitive to the pH value of an emulsion and does not lose sensitivity in the presence of halogen andfree silver ions but is stable and influenced very little by such factors so that instead of impairing the stability or keeping qualities of the emulsion as is thecase with dyes heretofore used, it has the further advantage of improving the character and lasting qualities of theemulsion. I An additional object of the invention is to ime prove the results obtained-with as well as the quality of reflexcopy paper which is exposed ina contact printer with the coated side out and the subject to be'copied is placed face down against the coating, with a light source arranged todirect light through'the coated light sensitive Piper on to the subject to be copied, the light being absorbed by the printed portions and reiiected back on to the light sensitive coating where it strikes anunprintedor white portion.
In the production of reflex copy .paper,- the -best results have heretofore been obtained by us ing a sensitizing ye in the emulsion andlin 117' in this desirable region of the spect I Another object of the invention'is to afiord a coating for photographic papers containing a An additional object of the invention is af ford a chloride emulsion coating-having an exposure speed as fast as that of a bromid emulslon while retaining the desirable advantages of the chloride emulsion.
The purposes of the invention may be accomplished with a silver chloride emulsion, or a sil-. ver' bromo-chloride emulsion containing approx imately one-third to one-half bromide and twothirds to one-half chloride, by dding the dye 7 solution to the emulsion either during the mixing process at' any time after the silver halide: is formed, or shortly before the emulsion is coated on the paper or support. The dye solution may consist of' one part of dye to one thousand or two thousand partsof solvent, either water tion a desensitiser, the function or which is to desensltize the emulsion so, asto slow down its fi m-speed andmak poesibletheuseofsuch a paper or alcohol, and satisfactory results I have been obtained by adding: 0.1 to 02 gram of such a dye solution to approximately forty pounds of Dyes which have been found is cllEiCNfikNOi, acridine orang 01' tetra-i in subdued daylightbut a desensitizer has a practical disadvantage since its desensitiring action on the flexcopy P per thatwill attain etmallys d'and v the of a thus preventing deterioration the coating and renders it unfit fol-successful use after it has been stored for a length of time, and itis an additional; purpose of the invention to afford a remethyl diamino acrldin chlorhsdrat. theformula for which is CnHhNsCH-ZDOB, and acrlilavin or diamino methyl acridinnimchlorid-chlorhydrat, formulaforwhichis Q14E1M-i-HCI. These .are acridine dyes,,each containing two benzene rings united by carbon and nitrogen respectively, W
' and experiments already conducted indicate that the invention can be, successfully carried out with any otthe satisfactory in 1 W; the results as stated above are phos-f phi'ne or chr'ysanilin nitrate, the formula'jfor These dyes give a highly satisfactory degree of sensitivity in the region of the spectrum between 4400 and 5200 angstroms with an extremely fast exposure speed in relation to the initial speed sult and is easier to prepare and handle than a bromide emulsion coating.
.The dyes herein disclosed enable the manufacture of coatings that are particularly adapted to color photography work by giving a fast exposure speed within the general spectral region from 4400 to 5200 angstroms. Spectrograms made from coatings sensitized with acriflavin, phosphine, and acridine' orange show high speed sensitivity at 4400 to 4800 angstroms, 4600 to 5200 angstroms, and 4400 to 5200 angstroms respectively, all within the spectral region that is best adapted to color separation work.
Most printing'and exposing of photographic paper is done with Mazda light which has increased actinic radiation toward the longer wave lengths and the dyes herein disclosed sensitize the emulsion to color within a spectral region that is well adapted and extremely efllcient when working with Mazda light.
The most satisfactory results have been obtained with silver chloride emulsion, although it is possible to use the dyes with some degree of success with silver chloro-bromide emulsions containing not more than one-half bromide.
The dyes disclosed, owing to their exposure speed, permit the use of a slow emulsion and hence one of low silver content, thus reducing cost particularly in the case of contact papers. The dyes disclosed are stable as against the pH value of an emulsion or the halogen and free silver ions which it contains and have no deteriorating influence on the coating, the emv ciency of which is not reduced or impaired with age, but on the contrary, the quality of the coating appears to be improved by the dye, so that no fogging is present and the photographic results are excellent.
When used for reflex copy paper, the use of a desensitizer is unnecessary and the keeping quality of the paper is considerably better than when a desensitizer is employed while the speed in relation to the natural emulsion is quite sumcient for practical and successful results.
The dyes disclosed are of low cost, simple to produce, easily obtainable commercially, and they can be incorporated readily in the emulsion owing to their chemical nature. They impart to the coating of enlarging paper a fasterspeed relatively to the natural emulsion than dyes heretofore used for this purpose, and help to give the necessary keeping quality to the emulsion that is required for practical requirements. The results obtained are substantially better both as to the image obtained and the stability of the coating than enlarging papers heretofore obtainable, and when used for contact papers, an emulsion with a lower silver content than heretofore can be employed without aifecting the resulting image. Thus the ease of handling and other advantages that characterize a chloride emulsion are had while retaining the speed of a bromide emulsion but without any of the undesirable characteristics of the latter.
Other advantages and results will develop from use of the dyes set forth in a light sensitive silver haloid coating, and this application is intended to cover such adaptations of the invention as may come within the purposes of the improvement and the scope of the following claims.
I claim:
1. A photographic coating which can be exposed for printing in subdued daylight under Mazda light and contains one of the group of emulsions consisting of silver chloride emulsion, and silver bromo-chlorlde emulsion containing approximately one-third to one-half bromide and two-thirds to one-half chloride, and an acridine dye which enhances the keeping power of the emulsion and imparts to the coating high speed sensitivity confined within the spectral region between not less than 4400 angstroms and not more than 5200 angstroms.
2. A photographic coating which can be exposed for printing in subdued daylight under Mazda light and contains one of the group of emulsions consisting of silver chloride emulsion,
and silver bromo-chloride emulsion containing approximately one-third to one-half bromide and two-thirds to one-half chloride, and oneof the group of dyes consisting of chrysanilin nitrate, tetramethyl diamino acridin chlorhydrat, and diamino methyl acridiniumchlorid-chlorhydrat, which enhances the keeping power of the emulsion and imparts to the coating high speed sensitivity confined within the spectral region between not less than 4400 angstroms and not more than '5200 angstroms.
J OHN DESSAUER.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US429280A US2352822A (en) | 1942-02-02 | 1942-02-02 | Photographic coating |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US429280A US2352822A (en) | 1942-02-02 | 1942-02-02 | Photographic coating |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| US2352822A true US2352822A (en) | 1944-07-04 |
Family
ID=23702579
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US429280A Expired - Lifetime US2352822A (en) | 1942-02-02 | 1942-02-02 | Photographic coating |
Country Status (1)
| Country | Link |
|---|---|
| US (1) | US2352822A (en) |
-
1942
- 1942-02-02 US US429280A patent/US2352822A/en not_active Expired - Lifetime
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