US930578A - Compound for the treatment of photographic prints. - Google Patents
Compound for the treatment of photographic prints. Download PDFInfo
- Publication number
- US930578A US930578A US44774308A US1908447743A US930578A US 930578 A US930578 A US 930578A US 44774308 A US44774308 A US 44774308A US 1908447743 A US1908447743 A US 1908447743A US 930578 A US930578 A US 930578A
- Authority
- US
- United States
- Prior art keywords
- compound
- treatment
- photographic prints
- prints
- cyanid
- 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
- 150000001875 compounds Chemical class 0.000 title description 9
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 10
- ISWSIDIOOBJBQZ-UHFFFAOYSA-N Phenol Chemical compound OC1=CC=CC=C1 ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 description 8
- 229910021538 borax Inorganic materials 0.000 description 6
- 239000004328 sodium tetraborate Substances 0.000 description 6
- 235000010339 sodium tetraborate Nutrition 0.000 description 6
- ZLMJMSJWJFRBEC-UHFFFAOYSA-N Potassium Chemical compound [K] ZLMJMSJWJFRBEC-UHFFFAOYSA-N 0.000 description 5
- 229910021529 ammonia Inorganic materials 0.000 description 5
- 229910052700 potassium Inorganic materials 0.000 description 5
- 239000011591 potassium Substances 0.000 description 5
- 239000000839 emulsion Substances 0.000 description 4
- 239000003517 fume Substances 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 239000004615 ingredient Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- CPELXLSAUQHCOX-UHFFFAOYSA-M Bromide Chemical compound [Br-] CPELXLSAUQHCOX-UHFFFAOYSA-M 0.000 description 1
- 229920000742 Cotton Polymers 0.000 description 1
- 108010010803 Gelatin Proteins 0.000 description 1
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 1
- 208000027418 Wounds and injury Diseases 0.000 description 1
- 230000000332 continued effect Effects 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000007789 gas Substances 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
- 208000014674 injury Diseases 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000000979 retarding effect Effects 0.000 description 1
- 229910052709 silver Inorganic materials 0.000 description 1
- 239000004332 silver Substances 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
- G03C7/00—Multicolour photographic processes or agents therefor; Regeneration of such processing agents; Photosensitive materials for multicolour processes
- G03C7/30—Colour processes using colour-coupling substances; Materials therefor; Preparing or processing such materials
- G03C7/42—Bleach-fixing or agents therefor ; Desilvering processes
Definitions
- This invention relates to photography, and
- the object ofthe invention is to provide a preparation or compound for removing yellow or brownish stains such as frequently appear upon photographic prints after the same have been developed.
- the invention may also be used to reduce the color of photographs which have been over printed, or exposed to the light too long in the printing operation.
- My compound consists of the following ingredients in substantially the proportions specified:
- Carbolic acid In the actual use of my preparation the cyanid of potassium affects the underlying emulsion of the photographic print, its action being to produce a separation of this emulsion, together with the photograph carried thereby, from the base on which it is placed.
- ammonia and borax in connection with the cyanid of potassium the effect of the latter is neutralized somewhat, the uneven separation of the emulsion 3 drams.
- the carbolic acid included in my compound is designed to neutralize the poison- "ous effect of the fumes of the cyanid of potassium, which would be inhaled by the operator and might result in serious injury.
- the fumes of the cyanid are dissipated by the carbolic acid and rendered practically harmless in this way. These fumes are also purified to a certain extent.
- a compound for treatment of photographic prints including the following ingredients in substantially the proportions specified: water, ten ounces; cyanid of potassium, one ounce; ammonia, ten drains; borax, twenty grains; and carbolic acid, three drams.
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Silver Salt Photography Or Processing Solution Therefor (AREA)
Description
FTQ
CHARLES B. WAITE, OF MEXICO, MEXICO.
COMPOUND FOR THE TREATMENT OF PHOTOGRAPHIC PRINTS.
To all whom it may concern:
Be it known that I, CHARLES B. WArrn, a
citizen of the United States, residing at city of Mexico. Mexico, have invented certain new and useful Improvements in Compounds for the Treatment of Photographic Prints, of which the following is a specification.
This invention relates to photography, and
particularly to treatment of photographic prints.
The object ofthe invention is to provide a preparation or compound for removing yellow or brownish stains such as frequently appear upon photographic prints after the same have been developed. The invention may also be used to reduce the color of photographs which have been over printed, or exposed to the light too long in the printing operation.
Not only may the invention be employed in connection with ordinary photo prints but itis contemplated to use the same in the manner above described on any photographs obtained by the process of development after short exposure of a negative or positive, and includes bromid enlargements, all papers or prints adapted to be printed by gas light, and also certain printing out papers which have for their base a silver emulsion combined with gelatin or collodion.
My compound consists of the following ingredients in substantially the proportions specified:
Water 10 ounces. Cyanid of potassium 1 ounce. Ammonia (28%) l0 drams. Borax 20 grains.
Carbolic acid In the actual use of my preparation the cyanid of potassium affects the underlying emulsion of the photographic print, its action being to produce a separation of this emulsion, together with the photograph carried thereby, from the base on which it is placed. By using the ammonia and borax in connection with the cyanid of potassium the effect of the latter is neutralized somewhat, the uneven separation of the emulsion 3 drams.
from the base carrying the same, and the production of spots which would ruin the Specification of Letters Patent.
Application filed August 10, 1908.
Patented Aug. 10, 1909.
Serial No. 447,743.
photograph being thus prevented. By con tinued experiments I have found that the use of ammonia and borax in the proportions stated enables me to secure the best results in theactual practice of my invention.
Were the cyanid employed in the present compound without the ammonia and borax, the action of the compound would be uneven, having a tendency to cause white streaks and spots on the print. The ammoniaand borax by retarding the action of the cyanid thus produce uniformity in the reducing or clearing process, and this is to great advantage in the practical embodiment of the invention, in fact is absolutely essential to obtain proper results.
The carbolic acid included in my compound is designed to neutralize the poison- "ous effect of the fumes of the cyanid of potassium, which would be inhaled by the operator and might result in serious injury. The fumes of the cyanid are dissipated by the carbolic acid and rendered practically harmless in this way. These fumes are also purified to a certain extent.
In treating photographic prints with my preparation I apply said preparation to the prints with a tuft of cotton, or the like, after which the prints are again placed in the fixing bath and thoroughly washed. The discoloring stains will be removed by applying the compound in the above manner or the same operation will reduce the color of prints should they have been printed too dark through inadvertence.
Having thus described the invention, what is claimed as new, is:
A compound for treatment of photographic prints including the following ingredients in substantially the proportions specified: water, ten ounces; cyanid of potassium, one ounce; ammonia, ten drains; borax, twenty grains; and carbolic acid, three drams.
In testimony whereof I aflix my signature in presence of two witnesses.
CHARLES B. WAITE.
WVitness%:
O. PIQUETTE MrronnLL, G. A. GUERRA.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US44774308A US930578A (en) | 1908-08-10 | 1908-08-10 | Compound for the treatment of photographic prints. |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US44774308A US930578A (en) | 1908-08-10 | 1908-08-10 | Compound for the treatment of photographic prints. |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| US930578A true US930578A (en) | 1909-08-10 |
Family
ID=2999001
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US44774308A Expired - Lifetime US930578A (en) | 1908-08-10 | 1908-08-10 | Compound for the treatment of photographic prints. |
Country Status (1)
| Country | Link |
|---|---|
| US (1) | US930578A (en) |
-
1908
- 1908-08-10 US US44774308A patent/US930578A/en not_active Expired - Lifetime
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