GB2475230A - Graphite gum dichromate process - Google Patents
Graphite gum dichromate process Download PDFInfo
- Publication number
- GB2475230A GB2475230A GB0919498A GB0919498A GB2475230A GB 2475230 A GB2475230 A GB 2475230A GB 0919498 A GB0919498 A GB 0919498A GB 0919498 A GB0919498 A GB 0919498A GB 2475230 A GB2475230 A GB 2475230A
- Authority
- GB
- United Kingdom
- Prior art keywords
- gum
- graphite
- paper
- dichromate
- emulsion
- 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.)
- Withdrawn
Links
- 238000000034 method Methods 0.000 title abstract description 5
- SOCTUWSJJQCPFX-UHFFFAOYSA-N dichromate(2-) Chemical compound [O-][Cr](=O)(=O)O[Cr]([O-])(=O)=O SOCTUWSJJQCPFX-UHFFFAOYSA-N 0.000 title abstract description 4
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 title abstract 3
- 229910002804 graphite Inorganic materials 0.000 title abstract 2
- 239000010439 graphite Substances 0.000 title abstract 2
- 244000215068 Acacia senegal Species 0.000 abstract 2
- 229920000084 Gum arabic Polymers 0.000 abstract 2
- 235000010489 acacia gum Nutrition 0.000 abstract 2
- 239000000839 emulsion Substances 0.000 abstract 2
- 239000000203 mixture Substances 0.000 abstract 2
- KMUONIBRACKNSN-UHFFFAOYSA-N potassium dichromate Chemical compound [K+].[K+].[O-][Cr](=O)(=O)O[Cr]([O-])(=O)=O KMUONIBRACKNSN-UHFFFAOYSA-N 0.000 abstract 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract 2
- 235000006491 Acacia senegal Nutrition 0.000 abstract 1
- 239000000205 acacia gum Substances 0.000 abstract 1
- 239000000835 fiber Substances 0.000 abstract 1
- 239000000049 pigment Substances 0.000 abstract 1
- 239000000725 suspension Substances 0.000 abstract 1
- 238000005406 washing Methods 0.000 abstract 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
- G03C1/00—Photosensitive materials
- G03C1/66—Compositions containing chromates as photosensitive substances
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Photosensitive Polymer And Photoresist Processing (AREA)
Abstract
A photographic printing process employing a suspension of graphite powder in a solution of gum arabic and potassium dichromate is disclosed. In use the mixture may be applied to fine water colour paper and air-dried. A negative is secured on top of the emulsion and the paper exposed to UV light thus hardening the dichromate in proportion to the amount of light exposure. The print is then place in a bath of cold water to remove unhardened areas of emulsion. This process may be repeated to build up an image. The mixture of gum acacia and bichromate does not require the use of pigments. The graphite is not absorbed into the fibers of the paper, but suspended in the gum solution, thus facilitating the clearing and washing of the image and yielding prints of higher contrast and density.
Description
GRAFFITE PHOTOGRAPHIC PRINT
Overview of the process The Gnthte print is an alternative proceu for producin.g fine art monochrome photographic. prints.
it is a variation on the gum dichromate process.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB0919498A GB2475230A (en) | 2009-11-09 | 2009-11-09 | Graphite gum dichromate process |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB0919498A GB2475230A (en) | 2009-11-09 | 2009-11-09 | Graphite gum dichromate process |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| GB0919498D0 GB0919498D0 (en) | 2009-12-23 |
| GB2475230A true GB2475230A (en) | 2011-05-18 |
Family
ID=41502021
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB0919498A Withdrawn GB2475230A (en) | 2009-11-09 | 2009-11-09 | Graphite gum dichromate process |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB2475230A (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB191203385A (en) * | 1912-02-10 | 1913-02-10 | John Edward Thornton | Improved Process for Making Motion Picture Films. |
| GB740166A (en) * | 1952-04-01 | 1955-11-09 | Grinten Chem L V D | Photographic process for the production of a pigment image on a receiving surface and light-sensitive sheets for use therein |
-
2009
- 2009-11-09 GB GB0919498A patent/GB2475230A/en not_active Withdrawn
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB191203385A (en) * | 1912-02-10 | 1913-02-10 | John Edward Thornton | Improved Process for Making Motion Picture Films. |
| GB740166A (en) * | 1952-04-01 | 1955-11-09 | Grinten Chem L V D | Photographic process for the production of a pigment image on a receiving surface and light-sensitive sheets for use therein |
Non-Patent Citations (1)
| Title |
|---|
| Encyclopaedia of nineteenth-century photography, Volume 1, page 1157. * |
Also Published As
| Publication number | Publication date |
|---|---|
| GB0919498D0 (en) | 2009-12-23 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| WAP | Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1) |