US838488A - Photographic developer. - Google Patents
Photographic developer. Download PDFInfo
- Publication number
- US838488A US838488A US22341404A US1904223414A US838488A US 838488 A US838488 A US 838488A US 22341404 A US22341404 A US 22341404A US 1904223414 A US1904223414 A US 1904223414A US 838488 A US838488 A US 838488A
- Authority
- US
- United States
- Prior art keywords
- developer
- iodid
- potassium
- bromid
- photographic
- 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
- ZLMJMSJWJFRBEC-UHFFFAOYSA-N Potassium Chemical compound [K] ZLMJMSJWJFRBEC-UHFFFAOYSA-N 0.000 description 9
- 229910052700 potassium Inorganic materials 0.000 description 9
- 239000011591 potassium Substances 0.000 description 9
- CPELXLSAUQHCOX-UHFFFAOYSA-M Bromide Chemical compound [Br-] CPELXLSAUQHCOX-UHFFFAOYSA-M 0.000 description 7
- 150000003839 salts Chemical class 0.000 description 4
- KWYUFKZDYYNOTN-UHFFFAOYSA-M Potassium hydroxide Chemical compound [OH-].[K+] KWYUFKZDYYNOTN-UHFFFAOYSA-M 0.000 description 3
- 239000003795 chemical substances by application Substances 0.000 description 3
- SOCTUWSJJQCPFX-UHFFFAOYSA-N dichromate(2-) Chemical compound [O-][Cr](=O)(=O)O[Cr]([O-])(=O)=O SOCTUWSJJQCPFX-UHFFFAOYSA-N 0.000 description 3
- 229940072033 potash Drugs 0.000 description 3
- 235000015320 potassium carbonate Nutrition 0.000 description 3
- BWHMMNNQKKPAPP-UHFFFAOYSA-L potassium carbonate Substances [K+].[K+].[O-]C([O-])=O BWHMMNNQKKPAPP-UHFFFAOYSA-L 0.000 description 3
- QGZKDVFQNNGYKY-UHFFFAOYSA-O Ammonium Chemical compound [NH4+] QGZKDVFQNNGYKY-UHFFFAOYSA-O 0.000 description 2
- QIGBRXMKCJKVMJ-UHFFFAOYSA-N Hydroquinone Chemical compound OC1=CC=C(O)C=C1 QIGBRXMKCJKVMJ-UHFFFAOYSA-N 0.000 description 2
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000004615 ingredient Substances 0.000 description 2
- 239000002574 poison Substances 0.000 description 2
- 231100000614 poison Toxicity 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 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 1
- BVKZGUZCCUSVTD-UHFFFAOYSA-L Carbonate Chemical compound [O-]C([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-L 0.000 description 1
- LSNNMFCWUKXFEE-UHFFFAOYSA-N Sulfurous acid Chemical compound OS(O)=O LSNNMFCWUKXFEE-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000002301 combined effect Effects 0.000 description 1
- 230000002498 deadly effect Effects 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- QEVHRUUCFGRFIF-MDEJGZGSSA-N reserpine Chemical compound O([C@H]1[C@@H]([C@H]([C@H]2C[C@@H]3C4=C(C5=CC=C(OC)C=C5N4)CCN3C[C@H]2C1)C(=O)OC)OC)C(=O)C1=CC(OC)=C(OC)C(OC)=C1 QEVHRUUCFGRFIF-MDEJGZGSSA-N 0.000 description 1
- 235000019345 sodium thiosulphate 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
- G03C5/29—Development processes or agents therefor
- G03C5/30—Developers
- G03C5/3021—Developers with oxydisable hydroxyl or amine groups linked to an aromatic ring
Definitions
- This invention relates to photographic developers of that variety which are adapted for so-calledfi gas-light development papers, or papers designed to be exposed to artificial light or to diffused daylight and not to the direct rays of the sun.
- the developer herein described is not suitable for films, plates, (except lantern-slide plates or other diapositives,) or for bromid papers.
- the objects of this invention are to produce a developer which will not poison the hands which will keep indefinitely before use without oxidation and for a very long time, almost indefinitely, after use; which will require only about half the usual time of exposure; which will secure purity of high lights and half-tones, perfect blacks, and uniformity of tone; which will correct the greenish-brown effect of an excess-of bromid of potassium in thedeveloper, and which will insure an absolute freedom from the frictionmarks or abrasionunarks on glossy paper.
- the developer containing the iodid can be used repeatedly until exhausted and may be renewed as to uantity by adding new developer to the o d without affecting the tone of the print.
- the use of this developer reduces the time necessary for exposure by one-half and develops glossy papers without abrasion-marks, sometlmes called frictionmarks.
- a photographic developer including an amidophenol developing agent, and a soluble iodid, substantially as specified.
- a photographic developer including an iodid, bichromate of potash, and bromid of lo amidophenol developing agent, and iodid of ammonium, substantially as specified. potassium substantially as specified.
- a photographic developer including an signature in presence of two witnesseses.
- a photographic developer including an amidophenol developing agent, a soluble
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Description
UNITED STATES PATENT OFFICE.
BERT L. WILLIAMS, OF LOWVELL, MASSACHUSETTS, ASSIGNOR OF ONE- HALF TO FRED ALSON BRYANT, OF LOWELL, MASSACHUSETTS.
PHOTOGRAPHIC DEVELOPER.
Specification of Letters Patent.
Application filed September 6, 1904:. Serial No. 223,414.
To all whmn it may concern.-
Be it knownz'thatil, BERT L. VVILLIAMS, a citizen of the United States, residin in Lowell, in the county of Middlesex and ommonwealth of Massachusetts, have invented a certain new and useful Improvement in Photographic Developers, of which the following is a specification.
This invention relates to photographic developers of that variety which are adapted for so-calledfi gas-light development papers, or papers designed to be exposed to artificial light or to diffused daylight and not to the direct rays of the sun.
The developer herein described is not suitable for films, plates, (except lantern-slide plates or other diapositives,) or for bromid papers.
The objects of this invention are to produce a developer which will not poison the hands which will keep indefinitely before use without oxidation and for a very long time, almost indefinitely, after use; which will require only about half the usual time of exposure; which will secure purity of high lights and half-tones, perfect blacks, and uniformity of tone; which will correct the greenish-brown effect of an excess-of bromid of potassium in thedeveloper, and which will insure an absolute freedom from the frictionmarks or abrasionunarks on glossy paper. I accomplish these results by introducing into any developer of the amidophenol group for as-light papers about three grains of a so uble salt consisting of iodin combined with a base to an ounce of normal developer, using, preferably, iodid of potassium, by normal developer meaning developer of usual strength as used. Of course the concentrated developer will require a proportionately larger amount of the salt of iodin.
I have obtained entirely satisfactory results by using a developer of the followingnamed ingredients in the proportions stated below: to fifty ounces of water add successively thirty-five grains of metol, one hundred and fifty rains of hydroquinone, one hundred and fifty grains of iodid of potassium, five hundred and fifty grains of dry sulfite of soda twelve hundred grains of dry carbonate of soda, and five grains of bromid of potassium. Still better, to clear thehigh lights and half-tones of the print, I may add (but do not consider it essential) to the foregoing ten drops of the following solution, namely: water, eight ounces; bromid of ammonium, one ounce; and bichromate of potash, one'ounce.
All of the above-named ingredients, except the iodid of potassium, have been com bined and used in substantially the proportions named for developing photo raphic papers of thezclass first above specific With this developer as heretofore used (without the iodin salt) the least variation in the exposure or in the age of the developer is likely to cause dirty brownish tones, and an excess of bromid of potassium in the developer will give a greenish-brown effect.
I have discovered that the addition of the soluble iodin salt in the developer corrects.
all the troubles hereinbefore mentioned and implied, produces a fine clear tone, a perfect black, clear high lights and half-tones, and that a considerable variation in the proportion of bromid of potassium does not affect the tone of the print.
The developer containing the iodid can be used repeatedly until exhausted and may be renewed as to uantity by adding new developer to the o d without affecting the tone of the print. The use of this developer reduces the time necessary for exposure by one-half and develops glossy papers without abrasion-marks, sometlmes called frictionmarks.
Heretofore the only means of preventing abrasion-marks has been the use in the developer of hyposulfite of soda or cyanid of otassium, both of which render necessary a onger exposure and injure the tone of the print. The cyanid of potassium is also a deadly poison.
I do not intend to confine myself to the formula for a metol-hydroquinone developer above given, because the addition of a soluble iodid in about the proportion of three grains to the fluid ounce of normal developer to any of the developers used for gas-light development papers and diapositives will produce the beneficial results above described.
I claim as my invention 1. A photographic developer, including an amidophenol developing agent, and a soluble iodid, substantially as specified.
2. A photographic developer, including an iodid, bichromate of potash, and bromid of lo amidophenol developing agent, and iodid of ammonium, substantially as specified. potassium substantially as specified. In testimony whereof I-have aflixed my 3. A photographic developer, including an signature in presence of two Witnesses.
amidophenol developing agent, a soluble iodid, and bichromate of potash, substam" BERT WILLIAMS tially as specified. Witnesses:
ALBERT M. MOORE, GRACE CROWLEY.
4. A photographic developer, including an amidophenol developing agent, a soluble
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US22341404A US838488A (en) | 1904-09-06 | 1904-09-06 | Photographic developer. |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US22341404A US838488A (en) | 1904-09-06 | 1904-09-06 | Photographic developer. |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| US838488A true US838488A (en) | 1906-12-11 |
Family
ID=2906960
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US22341404A Expired - Lifetime US838488A (en) | 1904-09-06 | 1904-09-06 | Photographic developer. |
Country Status (1)
| Country | Link |
|---|---|
| US (1) | US838488A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2553498A (en) * | 1947-11-18 | 1951-05-15 | Gen Aniline & Film Corp | First developer for multilayer color film of the reversal type |
| US2657138A (en) * | 1950-01-03 | 1953-10-27 | Leonard A Robbins | Photographic film developing composition containing beta, beta'-di-chloroethyl ether |
-
1904
- 1904-09-06 US US22341404A patent/US838488A/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2553498A (en) * | 1947-11-18 | 1951-05-15 | Gen Aniline & Film Corp | First developer for multilayer color film of the reversal type |
| US2657138A (en) * | 1950-01-03 | 1953-10-27 | Leonard A Robbins | Photographic film developing composition containing beta, beta'-di-chloroethyl ether |
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