US935156A - Photographic developer. - Google Patents
Photographic developer. Download PDFInfo
- Publication number
- US935156A US935156A US30027706A US1906300277A US935156A US 935156 A US935156 A US 935156A US 30027706 A US30027706 A US 30027706A US 1906300277 A US1906300277 A US 1906300277A US 935156 A US935156 A US 935156A
- Authority
- US
- United States
- Prior art keywords
- borax
- developer
- developers
- tablet
- dry
- 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
- 229910021538 borax Inorganic materials 0.000 description 13
- 235000010339 sodium tetraborate Nutrition 0.000 description 13
- 239000004328 sodium tetraborate Substances 0.000 description 13
- 239000000203 mixture Substances 0.000 description 7
- PEDCQBHIVMGVHV-UHFFFAOYSA-N Glycerine Chemical compound OCC(O)CO PEDCQBHIVMGVHV-UHFFFAOYSA-N 0.000 description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 5
- QIGBRXMKCJKVMJ-UHFFFAOYSA-N Hydroquinone Chemical compound OC1=CC=C(O)C=C1 QIGBRXMKCJKVMJ-UHFFFAOYSA-N 0.000 description 4
- 239000004615 ingredient Substances 0.000 description 4
- ZVNPWFOVUDMGRP-UHFFFAOYSA-N 4-methylaminophenol sulfate Chemical compound OS(O)(=O)=O.CNC1=CC=C(O)C=C1.CNC1=CC=C(O)C=C1 ZVNPWFOVUDMGRP-UHFFFAOYSA-N 0.000 description 3
- 239000000084 colloidal system Substances 0.000 description 3
- 239000000470 constituent Substances 0.000 description 3
- 235000011187 glycerol Nutrition 0.000 description 3
- 239000007787 solid Substances 0.000 description 3
- 239000003795 chemical substances by application Substances 0.000 description 2
- 159000000011 group IA salts Chemical class 0.000 description 2
- 239000003755 preservative agent Substances 0.000 description 2
- 230000002335 preservative effect Effects 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 241000416162 Astragalus gummifer Species 0.000 description 1
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 1
- WQZGKKKJIJFFOK-GASJEMHNSA-N Glucose Natural products OC[C@H]1OC(O)[C@H](O)[C@@H](O)[C@@H]1O WQZGKKKJIJFFOK-GASJEMHNSA-N 0.000 description 1
- 229920000084 Gum arabic Polymers 0.000 description 1
- 241000978776 Senegalia senegal Species 0.000 description 1
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 description 1
- 229920001615 Tragacanth Polymers 0.000 description 1
- 235000010489 acacia gum Nutrition 0.000 description 1
- 239000000205 acacia gum Substances 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- -1 as for example Substances 0.000 description 1
- 235000010338 boric acid Nutrition 0.000 description 1
- KGBXLFKZBHKPEV-UHFFFAOYSA-N boric acid Chemical compound OB(O)O KGBXLFKZBHKPEV-UHFFFAOYSA-N 0.000 description 1
- 229960002645 boric acid Drugs 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 239000008103 glucose Substances 0.000 description 1
- 238000007654 immersion Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- RWPGFSMJFRPDDP-UHFFFAOYSA-L potassium metabisulfite Chemical compound [K+].[K+].[O-]S(=O)S([O-])(=O)=O RWPGFSMJFRPDDP-UHFFFAOYSA-L 0.000 description 1
- 229940043349 potassium metabisulfite Drugs 0.000 description 1
- 235000010263 potassium metabisulphite Nutrition 0.000 description 1
- 230000001376 precipitating effect Effects 0.000 description 1
- 239000012047 saturated solution Substances 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 239000006188 syrup Substances 0.000 description 1
- 235000020357 syrup Nutrition 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
- G03C5/264—Supplying of photographic processing chemicals; Preparation or packaging thereof
- G03C5/265—Supplying of photographic processing chemicals; Preparation or packaging thereof of powders, granulates, tablets
Definitions
- This invention relates to the development of photographic plates, films and the like and has for its object the combining in tablet form, of the developing agents proper such as metol or hydroquinone, with the accelerating chemicals such as alkaline salts, as for example, borax, so as to contain the two agents in one and the same tablet.
- the developing agents proper such as metol or hydroquinone
- the accelerating chemicals such as alkaline salts, as for example, borax
- a quarter plate, one tablet composed of the following ingredients in or about the proportions stated may be taken as the standard, though the said proportions may be slightly varied according to circumstances such as for compensating for errors of exposure, depending upon the general knowledge of the photographer as to the peculiarities and requirements of the particular plates or films he is using.
- Metol 2 grains, hydroquinone 4 grains, potassium metabisulfite (powdered) :2; to 1 grain, borax 10 to 20 grains, colloid, such as gum tragacanth, or like adhesive 9.
- glycerin, or other hygroscopic medium 6.
- glucose syrup 8. (optional for assisting solubilities).
- borax being well known as an addition to liquid developers containing another alkaline salt (see the article Borax in the Dictionary 0 f Photography 8th edition, I-Iazell & Go.)
- My invention consists in using borax as the accelerating alkali in a solid dry compacted composition, kept or stored ready for solution in water.
- the borax being a bi-borate and an acid, acts as a preservative of the dry developing constituents in the solid developer tablet. Upon the immersion of the tablet in Water, the borax and water inter-act or re act on each other and the borax hydrolizes into soda and boracic acid and so becomes an accelerator.
- the developer is the one which I prefer to use in practice. It is a favorite and is the most commercially economical and de sirable and for these and other reasons is found to be the best.
- the borax in addition to acting with metol-hydroquinone, also acts with a number of other developers, and equal success may be obtained with these developers, but they are considerably more In testimony whereof I have hereunto set expensive, my hand in presence of two subscribing Wit- What I claim and desire to secure by Let nesses this fifteenth day of January, 1906.
- a photographic developer consisting of a WVitnesses:
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Silver Salt Photography Or Processing Solution Therefor (AREA)
Description
UNITED STATES rare.
PHOTOGRAPI-IIG DEVELOPER.
No Drawing.
To all whom it may concern:
Be it known that I, WILLIAM FRAsnn CLAUGHTON KELLY, a subject of the King of Great Britain, residing at 22 l/Vinchendon road, Fulham, in the county of London, England, barrister-at-law, have invented certain new and useful Improvements Relating to Photographic Developers, of which the following is a specification.
This invention relates to the development of photographic plates, films and the like and has for its object the combining in tablet form, of the developing agents proper such as metol or hydroquinone, with the accelerating chemicals such as alkaline salts, as for example, borax, so as to contain the two agents in one and the same tablet. I
For developing say, a quarter plate, one tablet composed of the following ingredients in or about the proportions stated, may be taken as the standard, though the said proportions may be slightly varied according to circumstances such as for compensating for errors of exposure, depending upon the general knowledge of the photographer as to the peculiarities and requirements of the particular plates or films he is using. Metol 2 grains, hydroquinone 4 grains, potassium metabisulfite (powdered) :2; to 1 grain, borax 10 to 20 grains, colloid, such as gum tragacanth, or like adhesive 9. 8., glycerin, or other hygroscopic medium 6. 9. glucose syrup 8. (optional for assisting solubilities). Mix the dry ingredients, add the colloid and glycerin (about two drops of a saturated solution of gum arabic, and 1 drop of glycerin suffice), then add alcohol continuously, and stir to avoid precipitating the colloid, in sufiicient quantity to make the mixture into a paste. Then press the mixture into contact with glass or other molding surface for shaping the paste into tablets if desired, said mixture being allowed to dry therein and when dry, being ready for use. The tablet is dissolved in water for use as a developer.
I wish it to be clearly understood that I do not confine myself strictly to the exact ingredients and proportions set forth above, as it is well known that plates and films vary considerably in their particular requirements Specification of Letters Patent.
Patented Sept. 28, 1969..
Application filed February 9, 1906. Serial No. 300,277.
according to the different lengths of exposure and other peculiarities, and I wish to employ the developer as set forth as a standard, reserving for myself the right to add ingredients or vary the proportions according to requirements. For instance the amount of metol set forth in the foregoing, is found to be insufficient for a half plate, more than double the quantity being required though not three times as much. These variations are well known in photography and can readily be coped with by slightly altering the composition of the developer.
I am aware that various dry or compacted developers only requiring the addition of water have been proposed prepared or used, but these dry compacted developers have not contained borax as a constituent as far as I am aware. The result has been that such developers have been incapable of being preserved as is necessary. The developer pre pared according to the herein described method and containing borax as a constituent is however capable of being preserved practically indefinitely.
I make no universal or general claims to the use of borax in the developer, borax being well known as an addition to liquid developers containing another alkaline salt (see the article Borax in the Dictionary 0 f Photography 8th edition, I-Iazell & Go.) My invention consists in using borax as the accelerating alkali in a solid dry compacted composition, kept or stored ready for solution in water. The borax being a bi-borate and an acid, acts as a preservative of the dry developing constituents in the solid developer tablet. Upon the immersion of the tablet in Water, the borax and water inter-act or re act on each other and the borax hydrolizes into soda and boracic acid and so becomes an accelerator.
The developer, according to the chemical formula above set forth, is the one which I prefer to use in practice. It is a favorite and is the most commercially economical and de sirable and for these and other reasons is found to be the best. The borax, in addition to acting with metol-hydroquinone, also acts with a number of other developers, and equal success may be obtained with these developers, but they are considerably more In testimony whereof I have hereunto set expensive, my hand in presence of two subscribing Wit- What I claim and desire to secure by Let nesses this fifteenth day of January, 1906.
ters Pa ent of the United States is:' WILLIAM FRASER GLAUGHTON KELLY.
A photographic developer consisting of a WVitnesses:
solid dry compacted composition in tablet F. J. RArsoN,
form and containing borax as a preservative. A. H. S'rnvENs.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US30027706A US935156A (en) | 1906-02-09 | 1906-02-09 | Photographic developer. |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US30027706A US935156A (en) | 1906-02-09 | 1906-02-09 | Photographic developer. |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| US935156A true US935156A (en) | 1909-09-28 |
Family
ID=3003579
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US30027706A Expired - Lifetime US935156A (en) | 1906-02-09 | 1906-02-09 | Photographic developer. |
Country Status (1)
| Country | Link |
|---|---|
| US (1) | US935156A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2482163A (en) * | 1944-06-17 | 1949-09-20 | Walter S Finnell | Dual-purpose mop having steel and fibrous pads |
| US2644755A (en) * | 1947-12-09 | 1953-07-07 | Polaroid Corp | Photographic product for carrying out a one-step photographic process |
| WO1981002934A1 (en) * | 1980-04-11 | 1981-10-15 | Eastman Kodak Co | Photographic processing concentrates |
| US5316898A (en) * | 1992-02-25 | 1994-05-31 | Konica Corporation | Solid bleacher for silver halide color photographic light sensitive material and the processing method thereof |
| US5376509A (en) * | 1991-11-27 | 1994-12-27 | Konica Corporation | Solid processing compositions for light-sensitive silver halide photographic materials |
| US5780211A (en) * | 1991-05-01 | 1998-07-14 | Konica Corporation | Processing composition in the tablet form for silver halide photographic light-sensitive material |
-
1906
- 1906-02-09 US US30027706A patent/US935156A/en not_active Expired - Lifetime
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2482163A (en) * | 1944-06-17 | 1949-09-20 | Walter S Finnell | Dual-purpose mop having steel and fibrous pads |
| US2644755A (en) * | 1947-12-09 | 1953-07-07 | Polaroid Corp | Photographic product for carrying out a one-step photographic process |
| WO1981002934A1 (en) * | 1980-04-11 | 1981-10-15 | Eastman Kodak Co | Photographic processing concentrates |
| US5780211A (en) * | 1991-05-01 | 1998-07-14 | Konica Corporation | Processing composition in the tablet form for silver halide photographic light-sensitive material |
| US5376509A (en) * | 1991-11-27 | 1994-12-27 | Konica Corporation | Solid processing compositions for light-sensitive silver halide photographic materials |
| US5316898A (en) * | 1992-02-25 | 1994-05-31 | Konica Corporation | Solid bleacher for silver halide color photographic light sensitive material and the processing method thereof |
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