US1064379A - Toning-bath for photographic silver-prints. - Google Patents
Toning-bath for photographic silver-prints. Download PDFInfo
- Publication number
- US1064379A US1064379A US74794913A US1913747949A US1064379A US 1064379 A US1064379 A US 1064379A US 74794913 A US74794913 A US 74794913A US 1913747949 A US1913747949 A US 1913747949A US 1064379 A US1064379 A US 1064379A
- Authority
- US
- United States
- Prior art keywords
- bath
- prints
- toning
- photographic silver
- selenium
- 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
- BUGBHKTXTAQXES-UHFFFAOYSA-N Selenium Chemical compound [Se] BUGBHKTXTAQXES-UHFFFAOYSA-N 0.000 description 5
- 229910052711 selenium Inorganic materials 0.000 description 5
- 239000011669 selenium Substances 0.000 description 5
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 4
- 150000003839 salts Chemical class 0.000 description 4
- 229910052709 silver Inorganic materials 0.000 description 4
- 239000004332 silver Substances 0.000 description 4
- 239000002253 acid Substances 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- LSNNMFCWUKXFEE-UHFFFAOYSA-M Bisulfite Chemical compound OS([O-])=O LSNNMFCWUKXFEE-UHFFFAOYSA-M 0.000 description 2
- XUQYOMJHENVHCZ-UHFFFAOYSA-M [O-]S(O)(=O)=O.[Na+].[SeH2] Chemical compound [O-]S(O)(=O)=O.[Na+].[SeH2] XUQYOMJHENVHCZ-UHFFFAOYSA-M 0.000 description 2
- 239000003513 alkali Substances 0.000 description 2
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 description 2
- GEHJYWRUCIMESM-UHFFFAOYSA-L sodium sulfite Chemical compound [Na+].[Na+].[O-]S([O-])=O GEHJYWRUCIMESM-UHFFFAOYSA-L 0.000 description 2
- AKHNMLFCWUSKQB-UHFFFAOYSA-L sodium thiosulfate Chemical compound [Na+].[Na+].[O-]S([O-])(=O)=S AKHNMLFCWUSKQB-UHFFFAOYSA-L 0.000 description 2
- 235000019345 sodium thiosulphate Nutrition 0.000 description 2
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 description 1
- LSNNMFCWUKXFEE-UHFFFAOYSA-N Sulfurous acid Chemical compound OS(O)=O LSNNMFCWUKXFEE-UHFFFAOYSA-N 0.000 description 1
- 238000009835 boiling Methods 0.000 description 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- 239000010931 gold Substances 0.000 description 1
- QCLSUIOYTSYVNG-UHFFFAOYSA-N lambda1-selanylpotassium Chemical compound [K].[Se] QCLSUIOYTSYVNG-UHFFFAOYSA-N 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000007935 neutral effect Effects 0.000 description 1
- 229910052697 platinum Inorganic materials 0.000 description 1
- XAEFZNCEHLXOMS-UHFFFAOYSA-M potassium benzoate Chemical compound [K+].[O-]C(=O)C1=CC=CC=C1 XAEFZNCEHLXOMS-UHFFFAOYSA-M 0.000 description 1
- DJEHXEMURTVAOE-UHFFFAOYSA-M potassium bisulfite Chemical compound [K+].OS([O-])=O DJEHXEMURTVAOE-UHFFFAOYSA-M 0.000 description 1
- 229940099427 potassium bisulfite Drugs 0.000 description 1
- 235000010259 potassium hydrogen sulphite Nutrition 0.000 description 1
- BHZRJJOHZFYXTO-UHFFFAOYSA-L potassium sulfite Chemical compound [K+].[K+].[O-]S([O-])=O BHZRJJOHZFYXTO-UHFFFAOYSA-L 0.000 description 1
- 235000019252 potassium sulphite Nutrition 0.000 description 1
- -1 selenium sulfate compound Chemical class 0.000 description 1
- 235000010265 sodium sulphite Nutrition 0.000 description 1
Images
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
- G03C7/3046—Processing baths not provided for elsewhere, e.g. final or intermediate washings
Definitions
- REHLILNDER OF CHARLOTTENBURG, GERMANY, ASSIGNOR TO CHEMISCHE FABRIK AUF ACTIEN (VORM. E.
- toning silver' prints a salt of an acid containfor example a selenium sulfate compound.
- a salt of an acid containfor example a selenium sulfate compound.
- the solutions of such salts are neutral, very stable in the presence of an alkali sulfite afld in the atmosphere.
- Very dilute solutions may be employed as a solution'coiitaining even 1/20% of selenium'conimences-totone.
- the white portions of a print are not discolored so no after-treatment with bisulfite is necessary.
- a toning bath for photographic silver prints containing a salt of an acid which 10 cubic centimeters of such solution contains selenium, substantially as described.
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Investigating Or Analyzing Non-Biological Materials By The Use Of Chemical Means (AREA)
Description
ing selenium,
UNITED STATES PATENT OFFICE.
PAUL
REHLILNDER, OF CHARLOTTENBURG, GERMANY, ASSIGNOR TO CHEMISCHE FABRIK AUF ACTIEN (VORM. E.| SCHERING),
OF BERLIN, GERMANY. I
TUNING-BATH FORPHOTOGRAPHIC SILVER-PRINTS.
No Drawing.
, To all whom it may concern:
Be it known that I, PAUL REHLANDER, doctor of philosophy, chemist, citizen of the German Empire, residing at Charlottenburg, near Berlin, German Empire, have invented a new and useful Improvement in Toning- Baths for Photographic Silver-Prints, of which the following is a specification.
It has already been proposed to. employ selenium dissolved in an alkali sulfid solution for toning photographic prints. Such solutions however, especially when dilute, rapidly deteriorate as they easily become oxidized by the atmosphere. Moreover the white portions of a print'turn brownish so that the riot has to be after-treated in a bisulfite Bath. These baths are strongly alkaline and therefore afiect the hands and the paper. Further it is only possible to obtain one tone of brown.
According to this invention I employ for.
toning silver' prints a salt of an acid containfor example a selenium sulfate compound. 'The solutions of such salts are neutral, very stable in the presence of an alkali sulfite afld in the atmosphere.
Very dilute solutions may be employed as a solution'coiitaining even 1/20% of selenium'conimences-totone. The white portions of a print are not discolored so no after-treatment with bisulfite is necessary.
One great advantage in the use oftsuch baths is that they, are-employed in exactly the same manner as the gold and platinum solutions habitually used and good tones of different shades can be obtained.
a Fem/pier. 1. 100 grams of sodium thiosulfate, 1.5
sulfate.-
prints, acid, substantially as described.
Specification of Letters Patent. Patented J 11116 10, 1913, Application filed February 12, 1913. Serial No. 747,949. T
grams sodium selenium sulfate and 13 grams sodium sulfite sicc. are dissolved in one liter of Water. The developed and fixed silver print is well washed and immersed in such bath for three to ten minutes according to the quality of the print and the tone it is desired to obtain. The tone changes from a pure black, according to the developer employed, into a brownish or into a violet-blue tone and finally into a red one.
2. 1 gram of potassium sulfite and 1 gram of sodium selenium sulfate are dissolved in a,. l]i3tle water and added to a solution of'5 grams of potassium bisulfite in 30 cubic centimeters water the mixture being heated to boiling. The solution contains mainly the potassium salt of the selenium trithioacid and a small quantity of potassium selenium are added to 200 cubic centimeters of a 20% solution of sodium thiosulfate. Such bath gives the same tone and has similar richness as the first named bath.
I' claim as my invention:
1. A toning bath for photographic silver prints, containing a salt of an acid which 10 cubic centimeters of such solution contains selenium, substantially as described.
'2. A toning bath for. photographic silver containing a salt of seleno sulfuric In testimonywhereof I have hereunto set my signature in the presence oftwo subscribing Witnesses.
PAUL REHLANDER.
Witnesses:
WOLDEMAR HAUPT, HENRY HAsrER.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US74794913A US1064379A (en) | 1913-02-12 | 1913-02-12 | Toning-bath for photographic silver-prints. |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US74794913A US1064379A (en) | 1913-02-12 | 1913-02-12 | Toning-bath for photographic silver-prints. |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| US1064379A true US1064379A (en) | 1913-06-10 |
Family
ID=3132623
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US74794913A Expired - Lifetime US1064379A (en) | 1913-02-12 | 1913-02-12 | Toning-bath for photographic silver-prints. |
Country Status (1)
| Country | Link |
|---|---|
| US (1) | US1064379A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2860978A (en) * | 1954-04-01 | 1958-11-18 | Eastman Kodak Co | Photographic washing accelerators |
-
1913
- 1913-02-12 US US74794913A patent/US1064379A/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2860978A (en) * | 1954-04-01 | 1958-11-18 | Eastman Kodak Co | Photographic washing accelerators |
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