US625527A - Photosensitive composition - Google Patents
Photosensitive composition Download PDFInfo
- Publication number
- US625527A US625527A US625527DA US625527A US 625527 A US625527 A US 625527A US 625527D A US625527D A US 625527DA US 625527 A US625527 A US 625527A
- Authority
- US
- United States
- Prior art keywords
- paper
- photosensitive composition
- sensitizing
- nitro
- 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
- 239000000203 mixture Substances 0.000 title description 8
- 230000001235 sensitizing Effects 0.000 description 16
- 231100000202 sensitizing Toxicity 0.000 description 16
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 8
- FRHBOQMZUOWXQL-UHFFFAOYSA-L Ammonium ferric citrate Chemical compound [NH4+].[Fe+3].[O-]C(=O)CC(O)(CC([O-])=O)C([O-])=O FRHBOQMZUOWXQL-UHFFFAOYSA-L 0.000 description 4
- -1 ammonium nitro-ferricyanid Chemical compound 0.000 description 4
- 150000001875 compounds Chemical class 0.000 description 4
- 235000000011 iron ammonium citrate Nutrition 0.000 description 4
- 239000004313 iron ammonium citrate Substances 0.000 description 4
- AOHMFUYIHARAGR-UHFFFAOYSA-N 2-hydroxypropane-1,2,3-tricarboxylic acid;magnesium Chemical compound [Mg].[Mg].[Mg].OC(=O)CC(O)(C(O)=O)CC(O)=O.OC(=O)CC(O)(C(O)=O)CC(O)=O AOHMFUYIHARAGR-UHFFFAOYSA-N 0.000 description 2
- KOYYEPZTIWTHDY-UHFFFAOYSA-N 2-hydroxypropane-1,2,3-tricarboxylic acid;zinc;dihydrate Chemical compound O.O.[Zn].[Zn].[Zn].OC(=O)CC(O)(C(O)=O)CC(O)=O.OC(=O)CC(O)(C(O)=O)CC(O)=O KOYYEPZTIWTHDY-UHFFFAOYSA-N 0.000 description 2
- 241000229754 Iva xanthiifolia Species 0.000 description 2
- 240000003670 Sesamum indicum Species 0.000 description 2
- 229940068475 ZINC CITRATE Drugs 0.000 description 2
- ZDYGORGGAIPTBN-UHFFFAOYSA-N [K+].[K+].[K+].[O-][N+](=O)[Fe-3](C#N)(C#N)(C#N)(C#N)(C#N)C#N Chemical compound [K+].[K+].[K+].[O-][N+](=O)[Fe-3](C#N)(C#N)(C#N)(C#N)(C#N)C#N ZDYGORGGAIPTBN-UHFFFAOYSA-N 0.000 description 2
- ZCWIEOCLXGUAJW-UHFFFAOYSA-N [Na+].[Na+].[Na+].[O-][N+](=O)[Fe-3](C#N)(C#N)(C#N)(C#N)(C#N)C#N Chemical compound [Na+].[Na+].[Na+].[O-][N+](=O)[Fe-3](C#N)(C#N)(C#N)(C#N)(C#N)C#N ZCWIEOCLXGUAJW-UHFFFAOYSA-N 0.000 description 2
- BWGUCJZACSYOSX-UHFFFAOYSA-N [O-][N+](=O)[Fe-3](C#N)(C#N)(C#N)(C#N)(C#N)C#N Chemical compound [O-][N+](=O)[Fe-3](C#N)(C#N)(C#N)(C#N)(C#N)C#N BWGUCJZACSYOSX-UHFFFAOYSA-N 0.000 description 2
- 239000007864 aqueous solution Substances 0.000 description 2
- 229960005336 magnesium citrate Drugs 0.000 description 2
- 235000002538 magnesium citrate Nutrition 0.000 description 2
- 239000004337 magnesium citrate Substances 0.000 description 2
- 238000009877 rendering Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 238000005406 washing Methods 0.000 description 2
- 235000006076 zinc citrate Nutrition 0.000 description 2
- 239000011746 zinc citrate Substances 0.000 description 2
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
- G03C1/64—Compositions containing iron compounds as photosensitive substances
Definitions
- REDFIELD B NEST, OF GUILFORD, CONNECTICUT.
- This invention relates to an improvement in sensitizing paper for photographic printing, the object of the invention being to produce a composition for sensitizing paper which may be readily compounded, which is quick in action, easy to prepare, inexpensive, and from which prints may be produced having the appearance of those made on plati hum-paper, with the advantage over the latter that the paper is blackened by light and so that the printing can be watched as it proceeds without timing it, and whereby the prints may be made in less time and with the exercise of less skill; and the invention consists in sensitizing paper with the composition hereinafter described, and particularly recited in the claim;
- the paper employed may be of the usual character, and the sensitizing compound consists of ammonium nitro-ferricyanid twentyl'ive parts, ammonium ferric citrate thirty parts, and water one hundred parts. To this may be added small quantities of other citrat es for the purpose of modifying the color of the printsfor example, the magnesium citrate to produce an engraving black or the zinc citrate for a brown. These, while not absolutely necessary for the success of the sensitizing paper, are of use for producing certain tints.
- Other soluble nitro-ferricyanids such as sodium nitro-ferricyanid or potassium nitro-ferricyanid, can be substituted for the ammo- Serial No. 700,283.
- composition for sensitizing paper consisting of a soluble nitroferricyanid, ammonium ferric citrate and water, in the proportions substantially as described.
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Paper (AREA)
Description
Unrrtzn STATES PATENT @rrrcn.
REDFIELD B. NEST, OF GUILFORD, CONNECTICUT.
PHOTOSENSITIVE COMPOSITION.
SPECIFICATION forming part of Letters Patent No. 625,527, dated May 23, 1899.
Application filed December 24, 1398.
To (til whom it may concern.-
Be it known that I, REDFIELD B. WEs'r, of Guilford, in the county of New Haven and State of Connecticut, have invented a new Improvement in Sensitizing Paper for Photographic Printing; and I do hereby declare the following to be a full, clear, and exact description of the same.
This invention relates to an improvement in sensitizing paper for photographic printing, the object of the invention being to produce a composition for sensitizing paper which may be readily compounded, which is quick in action, easy to prepare, inexpensive, and from which prints may be produced having the appearance of those made on plati hum-paper, with the advantage over the latter that the paper is blackened by light and so that the printing can be watched as it proceeds without timing it, and whereby the prints may be made in less time and with the exercise of less skill; and the invention consists in sensitizing paper with the composition hereinafter described, and particularly recited in the claim;
The paper employed may be of the usual character, and the sensitizing compound consists of ammonium nitro-ferricyanid twentyl'ive parts, ammonium ferric citrate thirty parts, and water one hundred parts. To this may be added small quantities of other citrat es for the purpose of modifying the color of the printsfor example, the magnesium citrate to produce an engraving black or the zinc citrate for a brown. These, while not absolutely necessary for the success of the sensitizing paper, are of use for producing certain tints. Other soluble nitro-ferricyanids, such as sodium nitro-ferricyanid or potassium nitro-ferricyanid, can be substituted for the ammo- Serial No. 700,283. (No p cimen nium nitro-fcrricyanid; but they are not as sensitive to light as is the ammonium nitroferricyanid, which is therefore to be preferred. Paper coated with this sensitizing compound is sensitive to light, by exposure to which it becomes brown or black, so that when exposed to light under a negative in the usual manner for printing photographs a picture in light and shadow is produced on the paper. This print is then Washed in water for two or three minutes to remove superfluous chemicals and then subjected for five minutes to a bath containing a mordant like the lead subacetate in twenty-per-cent. aqueous solution for the purpose of rendering the print permanent. For this bath any other well-known bath for fixin g the print may be employed. No further manipulation is necessary except a slight washing of the print in water.
The proportions given in the foregoing formula have been found in practice to give good results; but they may be varied to some extent without materially changing the result. I do not therefore wish to be limited to the precise proportions named. 4
Having fully described my invention, what I claim as new, and desire to secure by Letters Patent, is
The herein-described composition for sensitizing paper, consisting of a soluble nitroferricyanid, ammonium ferric citrate and water, in the proportions substantially as described.
In testimony whereof I have signed this specification in the presence of two subscribing witnesses.
REDFIELD B. WEST. \Vitnesses:
FRED. C. EARLE, LILLIAN D. KELsEY.
Publications (1)
Publication Number | Publication Date |
---|---|
US625527A true US625527A (en) | 1899-05-23 |
Family
ID=2694130
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US625527D Expired - Lifetime US625527A (en) | Photosensitive composition |
Country Status (1)
Country | Link |
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US (1) | US625527A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20060273657A1 (en) * | 2003-10-28 | 2006-12-07 | Continental Teves Ag & Co. Ohg | Method & system for improving the driving behavior of a vehicle |
-
0
- US US625527D patent/US625527A/en not_active Expired - Lifetime
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20060273657A1 (en) * | 2003-10-28 | 2006-12-07 | Continental Teves Ag & Co. Ohg | Method & system for improving the driving behavior of a vehicle |
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