US1994289A - Photographic process employing bichromated colloids - Google Patents
Photographic process employing bichromated colloids Download PDFInfo
- Publication number
- US1994289A US1994289A US702787A US70278733A US1994289A US 1994289 A US1994289 A US 1994289A US 702787 A US702787 A US 702787A US 70278733 A US70278733 A US 70278733A US 1994289 A US1994289 A US 1994289A
- Authority
- US
- United States
- Prior art keywords
- salt
- colloidal
- bichromate
- base
- soluble
- 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
- 238000000034 method Methods 0.000 title description 20
- 239000000084 colloidal system Substances 0.000 title description 3
- 150000003839 salts Chemical class 0.000 description 31
- 229910052751 metal Inorganic materials 0.000 description 13
- 239000002184 metal Substances 0.000 description 13
- SOCTUWSJJQCPFX-UHFFFAOYSA-N dichromate(2-) Chemical compound [O-][Cr](=O)(=O)O[Cr]([O-])(=O)=O SOCTUWSJJQCPFX-UHFFFAOYSA-N 0.000 description 11
- 239000000243 solution Substances 0.000 description 10
- 239000001828 Gelatine Substances 0.000 description 8
- 229920000159 gelatin Polymers 0.000 description 8
- 235000019322 gelatine Nutrition 0.000 description 8
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 6
- ZCDOYSPFYFSLEW-UHFFFAOYSA-N chromate(2-) Chemical compound [O-][Cr]([O-])(=O)=O ZCDOYSPFYFSLEW-UHFFFAOYSA-N 0.000 description 6
- 239000000839 emulsion Substances 0.000 description 6
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 5
- 229910017052 cobalt Inorganic materials 0.000 description 5
- 239000010941 cobalt Substances 0.000 description 5
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 description 5
- 229910052802 copper Inorganic materials 0.000 description 5
- 239000010949 copper Substances 0.000 description 5
- 229910052761 rare earth metal Inorganic materials 0.000 description 5
- 150000002910 rare earth metals Chemical class 0.000 description 5
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 description 4
- 206010070834 Sensitisation Diseases 0.000 description 4
- 230000008313 sensitization Effects 0.000 description 4
- QLOKJRIVRGCVIM-UHFFFAOYSA-N 1-[(4-methylsulfanylphenyl)methyl]piperazine Chemical compound C1=CC(SC)=CC=C1CN1CCNCC1 QLOKJRIVRGCVIM-UHFFFAOYSA-N 0.000 description 3
- 239000007795 chemical reaction product Substances 0.000 description 3
- 238000010790 dilution Methods 0.000 description 3
- 239000012895 dilution Substances 0.000 description 3
- 238000001035 drying Methods 0.000 description 3
- 150000002739 metals Chemical class 0.000 description 3
- 229910052759 nickel Inorganic materials 0.000 description 3
- 239000002244 precipitate Substances 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 2
- 229910004664 Cerium(III) chloride Inorganic materials 0.000 description 2
- ZLMJMSJWJFRBEC-UHFFFAOYSA-N Potassium Chemical compound [K] ZLMJMSJWJFRBEC-UHFFFAOYSA-N 0.000 description 2
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 description 2
- VYLVYHXQOHJDJL-UHFFFAOYSA-K cerium trichloride Chemical compound Cl[Ce](Cl)Cl VYLVYHXQOHJDJL-UHFFFAOYSA-K 0.000 description 2
- ABXXWVKOBZHNNF-UHFFFAOYSA-N chromium(3+);dioxido(dioxo)chromium Chemical compound [Cr+3].[Cr+3].[O-][Cr]([O-])(=O)=O.[O-][Cr]([O-])(=O)=O.[O-][Cr]([O-])(=O)=O ABXXWVKOBZHNNF-UHFFFAOYSA-N 0.000 description 2
- 229910052746 lanthanum Chemical class 0.000 description 2
- FZLIPJUXYLNCLC-UHFFFAOYSA-N lanthanum atom Chemical class [La] FZLIPJUXYLNCLC-UHFFFAOYSA-N 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000000049 pigment Substances 0.000 description 2
- 229910052700 potassium Inorganic materials 0.000 description 2
- 239000011591 potassium Substances 0.000 description 2
- 229910021653 sulphate ion Inorganic materials 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 229910052684 Cerium Inorganic materials 0.000 description 1
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 1
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 1
- 229910021529 ammonia Inorganic materials 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- GWXLDORMOJMVQZ-UHFFFAOYSA-N cerium Chemical compound [Ce] GWXLDORMOJMVQZ-UHFFFAOYSA-N 0.000 description 1
- 150000001805 chlorine compounds Chemical group 0.000 description 1
- 229910052804 chromium Inorganic materials 0.000 description 1
- 239000011651 chromium Substances 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- ARUVKPQLZAKDPS-UHFFFAOYSA-L copper(II) sulfate Chemical compound [Cu+2].[O-][S+2]([O-])([O-])[O-] ARUVKPQLZAKDPS-UHFFFAOYSA-L 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000005530 etching Methods 0.000 description 1
- 238000005470 impregnation Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 150000002815 nickel Chemical class 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 238000002791 soaking Methods 0.000 description 1
- 229910052708 sodium Inorganic materials 0.000 description 1
- 239000011734 sodium Substances 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03F—PHOTOMECHANICAL PRODUCTION OF TEXTURED OR PATTERNED SURFACES, e.g. FOR PRINTING, FOR PROCESSING OF SEMICONDUCTOR DEVICES; MATERIALS THEREFOR; ORIGINALS THEREFOR; APPARATUS SPECIALLY ADAPTED THEREFOR
- G03F7/00—Photomechanical, e.g. photolithographic, production of textured or patterned surfaces, e.g. printing surfaces; Materials therefor, e.g. comprising photoresists; Apparatus specially adapted therefor
- G03F7/004—Photosensitive materials
- G03F7/04—Chromates
Definitions
- This invention comprises improvements in photographic processes employing bichromated colloids and relates particularly to what is known as the bichromate process in which colloidal base such as gelatine is impregnated with a bichromate solution so as to become tanned (i. e. of reduced solubility in water) under the influence of light.
- the present invention accordingly comprises a process for the production of colloidal-base bichromate-sensitized films rendered more rapid by the inclusion of a soluble metal salt, (for example a salt of a rare earth) characterized by the fact that the soluble metal salt is incorporated with the colloidal base in its unsensitized state and the product dried prior to sensitization with bichromate.
- a soluble metal salt for example a salt of a rare earth
- the colloidal films according to this invention can withstand long'storage without. deterioration while impregnated with the soluble metallic salts before sensitization and, in addition, they can be stored for a time after sensi tization if desired without becoming insoluble or fogged as they would do were bichromation and impregnation with salts carried out simultaneously.
- the salt employed is a salt (for example a chloride) of a rare earth metal the chromate of which precipitates approximately at a pH value lying between 7 and 8.5 measured at infinite dilution.
- the salts of cerium (cerous) and lanthanum are found to be particularly suitable.
- the soluble salt employed may comprise a salt of one or more of the group of metals copper, cobalt or nickel.
- the soluble metal salt is incorporated with the colloidal base before it is spread out, as a film.
- an emulsion is formed by dispersing approximately 3% by weight of dry water-insoluble pigment in a 25% solution of gelatine.
- the mixture is agitated with the addition of a quantity of cerous chloride dissolved in a small quantity of water sufiicient to yield a 2% solution, by weight of the whole emulsion.
- the emulsion is then evenly coated upon one side of paper of the kind usually sold for preparing resists on copper for etching for photogravure or for the process known as the carbon process, and the coating is allowed to dry.
- an emulsion is formed by dispersing about 3%, by weight, of dry pigment into a 25% solution of gelatine. With this emulsion is added sufficient copper sulphate (or chloride) dissolved in a small quantity of water to give 1% solution, by weight, on the bulk of emulsion, which is afterwards coated on to one side of a photo paper. Alternatively, in the case of nickel and cobalt, about 2% of the sulphate or chloride is added. 45
- the rapidity of the tanning action shows a marked increase compared with that obtained using paper not containing salts according to the present invention.
- bicromate solution for example pure potassium, sodium or am monium bichromate
- the rapidity of the tanning action is increased approximately three times, whilst with copper, cobalt or nickel salts the rapidity of the tanning action is approximately twice that of the usual paper, and thus the length of exposure to light for a given degree of tanning can be correspondingly reduced.
- the light-sensitive paper may then be exposed behind a negative or behind a screen and positive according to the particular printing process in which the paper is being used.
- I claim 1 A method of producing colloidal-base films which can berendered light-sensitive by treat,- ment with a solution of a bichromate, consisting in introducing into a colloidal base a soluble metal salt selected from the group consisting of copper, cobalt, nickel, and the rare earths and drying the colloidal base While in an unsensitized state.
- a soluble metal salt selected from the group consisting of copper, cobalt, nickel, and the rare earths and drying the colloidal base While in an unsensitized state.
- 3L A method of producing colloidal-base films asclaimed in; claim 2, wherein the soluble salt is a salt of a rare earth metal, the chromate of which precipitates approximately at a pH value lying between 7 and 8.5 measured at infinite I dilution.
- a method of producing colloidal-base films which can be rendered light-sensitive by treatment with a solution of a bichromate consisting in introducing a soluble salt of one of the metals comprising the group copper, nickeljand cobalt latterin intothe colloidal base and drying the an unsensitized state.
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Paints Or Removers (AREA)
- Colloid Chemistry (AREA)
- Non-Silver Salt Photosensitive Materials And Non-Silver Salt Photography (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB6649/33A GB413428A (en) | 1933-03-04 | 1933-03-04 | Improvements in photographic processes employing bichromated colloids |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| US1994289A true US1994289A (en) | 1935-03-12 |
Family
ID=9818280
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US702787A Expired - Lifetime US1994289A (en) | 1933-03-04 | 1933-12-16 | Photographic process employing bichromated colloids |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US1994289A (en, 2012) |
| BE (1) | BE400105A (en, 2012) |
| DE (1) | DE679383C (en, 2012) |
| FR (1) | FR764726A (en, 2012) |
| GB (1) | GB413428A (en, 2012) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2564414A (en) * | 1949-05-14 | 1951-08-14 | Interchem Corp | Developer for bichromated colloids |
-
0
- BE BE400105D patent/BE400105A/xx unknown
-
1933
- 1933-03-04 GB GB6649/33A patent/GB413428A/en not_active Expired
- 1933-05-23 DE DEA69548D patent/DE679383C/de not_active Expired
- 1933-12-01 FR FR764726D patent/FR764726A/fr not_active Expired
- 1933-12-16 US US702787A patent/US1994289A/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| FR764726A (fr) | 1934-05-26 |
| GB413428A (en) | 1934-07-19 |
| DE679383C (de) | 1939-08-04 |
| BE400105A (en, 2012) |
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