US394437A - Gustave bay - Google Patents
Gustave bay Download PDFInfo
- Publication number
- US394437A US394437A US394437DA US394437A US 394437 A US394437 A US 394437A US 394437D A US394437D A US 394437DA US 394437 A US394437 A US 394437A
- Authority
- US
- United States
- Prior art keywords
- gustave
- bay
- bath
- copy
- matter
- 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
- 150000003839 salts Chemical class 0.000 description 16
- 239000011780 sodium chloride Substances 0.000 description 16
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Chemical class [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 12
- 229940072033 potash Drugs 0.000 description 10
- BWHMMNNQKKPAPP-UHFFFAOYSA-L potassium carbonate Substances [K+].[K+].[O-]C([O-])=O BWHMMNNQKKPAPP-UHFFFAOYSA-L 0.000 description 10
- 235000015320 potassium carbonate Nutrition 0.000 description 10
- KWYUFKZDYYNOTN-UHFFFAOYSA-M potassium hydroxide Chemical compound [OH-].[K+] KWYUFKZDYYNOTN-UHFFFAOYSA-M 0.000 description 10
- XFXPMWWXUTWYJX-UHFFFAOYSA-N cyanide Chemical compound N#[C-] XFXPMWWXUTWYJX-UHFFFAOYSA-N 0.000 description 8
- 239000002253 acid Substances 0.000 description 6
- 238000001802 infusion Methods 0.000 description 6
- 229910052742 iron Inorganic materials 0.000 description 6
- 239000002244 precipitate Substances 0.000 description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 6
- BVKZGUZCCUSVTD-UHFFFAOYSA-N Carbonic acid Chemical compound OC(O)=O BVKZGUZCCUSVTD-UHFFFAOYSA-N 0.000 description 4
- 229920000084 Gum arabic Polymers 0.000 description 4
- FEWJPZIEWOKRBE-XIXRPRMCSA-N Mesotartaric acid Chemical compound OC(=O)[C@@H](O)[C@@H](O)C(O)=O FEWJPZIEWOKRBE-XIXRPRMCSA-N 0.000 description 4
- 241000978776 Senegalia senegal Species 0.000 description 4
- 235000010489 acacia gum Nutrition 0.000 description 4
- 239000000205 acacia gum Substances 0.000 description 4
- QGZKDVFQNNGYKY-UHFFFAOYSA-N ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 4
- 230000015572 biosynthetic process Effects 0.000 description 4
- 238000006243 chemical reaction Methods 0.000 description 4
- 239000000284 extract Substances 0.000 description 4
- 238000005755 formation reaction Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 230000001264 neutralization Effects 0.000 description 4
- 235000002906 tartaric acid Nutrition 0.000 description 4
- 229960001367 tartaric acid Drugs 0.000 description 4
- 239000011975 tartaric acid Substances 0.000 description 4
- 235000008733 Citrus aurantifolia Nutrition 0.000 description 2
- RBTARNINKXHZNM-UHFFFAOYSA-K Iron(III) chloride Chemical compound Cl[Fe](Cl)Cl RBTARNINKXHZNM-UHFFFAOYSA-K 0.000 description 2
- 235000015450 Tilia cordata Nutrition 0.000 description 2
- 235000011941 Tilia x europaea Nutrition 0.000 description 2
- 239000007844 bleaching agent Substances 0.000 description 2
- VEXZGXHMUGYJMC-UHFFFAOYSA-M chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 description 2
- 238000007598 dipping method Methods 0.000 description 2
- 159000000011 group IA salts Chemical class 0.000 description 2
- 239000004571 lime Substances 0.000 description 2
- 150000007524 organic acids Chemical class 0.000 description 2
- 235000005985 organic acids Nutrition 0.000 description 2
- 235000013311 vegetables Nutrition 0.000 description 2
- 238000005406 washing Methods 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
- G03C1/005—Silver halide emulsions; Preparation thereof; Physical treatment thereof; Incorporation of additives therein
- G03C1/485—Direct positive emulsions
- G03C1/48538—Direct positive emulsions non-prefogged, i.e. fogged after imagewise exposure
Definitions
- the process is based as under, first, on the reduction, by the action of light, of the salts of iron in the presence of organic acids, (citric, tartaric, &c.;) second, on the formation of a brownish precipitate produced by these salts in the presence of the, yellow or red prussiates of potash, combined with certain yellow, red, and brown vegetable coloringmatters and the extracts and lakes of such matters; third, on the formation of a precipitate of coloring-matter varying from red to dark brown, produced by hydratic alkaline matterssuch, for instance, as soda, potash, ammonia, lime, &c., and the salts derived from themin the presence of a decoction or infusion of such coloring-matters or of their extracts.
- I prepare a paper with a solution of gumarabic, tartaric acid, and perchloride of iron. I leave it to dry, and afterward I expose it in a photographic frame under an india-ink tracing or any other suitable negative. On taking it out of the frame I develop the copy upon a bath of water saturated with prussiate of potash, after which I place it upon a bath consisting of a decoction or infusion of coloring-matter. ⁇ Vhen the lines of the copy are quite black, I wash the copy under a watertap, after which I dip the sheet in abath consisting of a salt of soda, ammonia, potash, &c.
- the degree of saturation is a matter of little importance, provided the salt is neutral and has an acid action with an alkaline reaction.
- the acid clears the background, while the alkaline matter destroys the blue produced by the salt of iron and the prussiate and the copy by means of the precipitate with the coloring-matter, either in violet,brown, or black, according to the salt used and the duration of the bath.
- the method described of obtaining a direct positive black-line copy on a white ground consisting in exposing a paper sensitized by a solution of gum-arabic, tartaric acid, and iron perchloride to the action of light, said paper being covered by the tracing or drawing to be copied, then developing the copy upon a bath of water saturated with prussiate of potash, then placing it upon a bath consisting of a decoction or infusion of coloring-matter, washing, and then dipping in a bath consisting of a neutral salt or salts having an acid action and an alkaline reaction, substantially as described.
Description
UNITED STATES PATENT OFFICE.
GUSTAVE BAY, OF SURESNES, NEAR PARIS, FRANCE.
PHOTOGRAPHIC COPYING PROCESS.
SPECIFICATION forming part of Letters Patent No. 394,437, dated December 11, 1888.
Application filed May 3, 1888. Serial No. 272,694. (No specimens.) Patented in France May 19, 1885, No. 169,013 in Belgium May 20, 1886, No. 73,204, and in England September 8, 1887, No. 12,168.
To aZZ whom it. may concern.-
Be it known that I, GUSTAVE BAY, a citizen of France, and a resident of Suresnes, near Paris, France, have invented a new or Improved Process for Rapidly Obtaining Positi ve Black-Line Copies from Positive Tracings orNegatives by the Action of Light, (for which I have obtained a British patent, No. 12,168, September 8, 1887 French patent, No. 169,013, May 19, 1885, and Belgian patent, No. 73,204, May 20, 1886,) of which the following is a specification.
The process is based as under, first, on the reduction, by the action of light, of the salts of iron in the presence of organic acids, (citric, tartaric, &c.;) second, on the formation of a brownish precipitate produced by these salts in the presence of the, yellow or red prussiates of potash, combined with certain yellow, red, and brown vegetable coloringmatters and the extracts and lakes of such matters; third, on the formation of a precipitate of coloring-matter varying from red to dark brown, produced by hydratic alkaline matterssuch, for instance, as soda, potash, ammonia, lime, &c., and the salts derived from themin the presence of a decoction or infusion of such coloring-matters or of their extracts.
I prepare a paper with a solution of gumarabic, tartaric acid, and perchloride of iron. I leave it to dry, and afterward I expose it in a photographic frame under an india-ink tracing or any other suitable negative. On taking it out of the frame I develop the copy upon a bath of water saturated with prussiate of potash, after which I place it upon a bath consisting of a decoction or infusion of coloring-matter. \Vhen the lines of the copy are quite black, I wash the copy under a watertap, after which I dip the sheet in abath consisting of a salt of soda, ammonia, potash, &c. The degree of saturation is a matter of little importance, provided the salt is neutral and has an acid action with an alkaline reaction. The acid clears the background, while the alkaline matter destroys the blue produced by the salt of iron and the prussiate and the copy by means of the precipitate with the coloring-matter, either in violet,brown, or black, according to the salt used and the duration of the bath. I finally wash under a tap with brush and plenty of Water. The baths may be used until ineffective. I can also obtain the copies bya single bath of about half prussiate and half coloring-matter, the development of the copy being my guide in the matter.
On taking the sheet out of the frame I place it for five or ten minutes upon this bath, after which I wash it with a brush. The copy will then appear black upon a yellowish ground, which I can subsequently clean and bleach by means of a bath of alkaline salt.
What I claim as my invention, and desire to secure by Letters Patent, is-
The method described of obtaining a direct positive black-line copy on a white ground, said method consisting in exposing a paper sensitized by a solution of gum-arabic, tartaric acid, and iron perchloride to the action of light, said paper being covered by the tracing or drawing to be copied, then developing the copy upon a bath of water saturated with prussiate of potash, then placing it upon a bath consisting of a decoction or infusion of coloring-matter, washing, and then dipping in a bath consisting of a neutral salt or salts having an acid action and an alkaline reaction, substantially as described.
In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.
GUSTAVE BAY.
\Vitnesses:
LOMBARD RONNEVILLE, CH. BROWN.
Publications (1)
| Publication Number | Publication Date |
|---|---|
| US394437A true US394437A (en) | 1888-12-11 |
Family
ID=2463406
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US394437D Expired - Lifetime US394437A (en) | Gustave bay |
Country Status (1)
| Country | Link |
|---|---|
| US (1) | US394437A (en) |
-
0
- US US394437D patent/US394437A/en not_active Expired - Lifetime
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