US2541488A - Electrolytic diazo process - Google Patents
Electrolytic diazo process Download PDFInfo
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- US2541488A US2541488A US654442A US65444246A US2541488A US 2541488 A US2541488 A US 2541488A US 654442 A US654442 A US 654442A US 65444246 A US65444246 A US 65444246A US 2541488 A US2541488 A US 2541488A
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- United States
- Prior art keywords
- support
- image
- direct current
- diazo
- acid
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- Expired - Lifetime
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- 238000000034 method Methods 0.000 title claims description 12
- 125000000664 diazo group Chemical group [N-]=[N+]=[*] 0.000 title description 13
- 239000000463 material Substances 0.000 claims description 20
- 230000008878 coupling Effects 0.000 claims description 9
- 238000010168 coupling process Methods 0.000 claims description 9
- 238000005859 coupling reaction Methods 0.000 claims description 9
- -1 DIAZO Chemical class 0.000 claims description 8
- 150000001875 compounds Chemical class 0.000 claims description 8
- 239000012954 diazonium Substances 0.000 claims description 8
- 150000001989 diazonium salts Chemical class 0.000 claims description 8
- 239000003381 stabilizer Substances 0.000 claims description 8
- 239000003792 electrolyte Substances 0.000 claims description 7
- 239000002253 acid Substances 0.000 claims description 6
- 239000002250 absorbent Substances 0.000 claims description 5
- 230000002745 absorbent Effects 0.000 claims description 5
- 239000006260 foam Substances 0.000 claims 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-M hydroxide Chemical class [OH-] XLYOFNOQVPJJNP-UHFFFAOYSA-M 0.000 claims 1
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 6
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 4
- YNAVUWVOSKDBBP-UHFFFAOYSA-N Morpholine Chemical compound C1COCCN1 YNAVUWVOSKDBBP-UHFFFAOYSA-N 0.000 description 3
- 239000011780 sodium chloride Substances 0.000 description 3
- UMGDCJDMYOKAJW-UHFFFAOYSA-N thiourea Chemical compound NC(N)=S UMGDCJDMYOKAJW-UHFFFAOYSA-N 0.000 description 3
- PHNDZBFLOPIMSM-UHFFFAOYSA-N 4-morpholin-4-ylaniline Chemical class C1=CC(N)=CC=C1N1CCOCC1 PHNDZBFLOPIMSM-UHFFFAOYSA-N 0.000 description 2
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 2
- PEDCQBHIVMGVHV-UHFFFAOYSA-N Glycerine Chemical compound OCC(O)CO PEDCQBHIVMGVHV-UHFFFAOYSA-N 0.000 description 2
- TWRXJAOTZQYOKJ-UHFFFAOYSA-L Magnesium chloride Chemical compound [Mg+2].[Cl-].[Cl-] TWRXJAOTZQYOKJ-UHFFFAOYSA-L 0.000 description 2
- ISWSIDIOOBJBQZ-UHFFFAOYSA-N Phenol Chemical compound OC1=CC=CC=C1 ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 description 2
- PMZURENOXWZQFD-UHFFFAOYSA-L Sodium Sulfate Chemical compound [Na+].[Na+].[O-]S([O-])(=O)=O PMZURENOXWZQFD-UHFFFAOYSA-L 0.000 description 2
- FEWJPZIEWOKRBE-UHFFFAOYSA-N Tartaric acid Natural products [H+].[H+].[O-]C(=O)C(O)C(O)C([O-])=O FEWJPZIEWOKRBE-UHFFFAOYSA-N 0.000 description 2
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Natural products CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 description 2
- KGBXLFKZBHKPEV-UHFFFAOYSA-N boric acid Chemical compound OB(O)O KGBXLFKZBHKPEV-UHFFFAOYSA-N 0.000 description 2
- 239000004327 boric acid Substances 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- GHMLBKRAJCXXBS-UHFFFAOYSA-N resorcinol Chemical compound OC1=CC=CC(O)=C1 GHMLBKRAJCXXBS-UHFFFAOYSA-N 0.000 description 2
- 150000003839 salts Chemical class 0.000 description 2
- VWDWKYIASSYTQR-UHFFFAOYSA-N sodium nitrate Chemical compound [Na+].[O-][N+]([O-])=O VWDWKYIASSYTQR-UHFFFAOYSA-N 0.000 description 2
- 239000011975 tartaric acid Substances 0.000 description 2
- 235000002906 tartaric acid Nutrition 0.000 description 2
- QEMJJLWFFURPES-UHFFFAOYSA-N 1,3-diamino-1,3-diphenylthiourea Chemical compound NN(C(N(C1=CC=CC=C1)N)=S)C1=CC=CC=C1 QEMJJLWFFURPES-UHFFFAOYSA-N 0.000 description 1
- HVLJEMXDXOTWLV-UHFFFAOYSA-N 2,4-dichloronaphthalen-1-ol Chemical compound C1=CC=C2C(O)=C(Cl)C=C(Cl)C2=C1 HVLJEMXDXOTWLV-UHFFFAOYSA-N 0.000 description 1
- OGHGKNBFECDAMC-UHFFFAOYSA-N 2-methoxy-4-(morpholin-4-ylmethyl)aniline Chemical compound C1=C(N)C(OC)=CC(CN2CCOCC2)=C1 OGHGKNBFECDAMC-UHFFFAOYSA-N 0.000 description 1
- TWPRYUNMILQJSA-UHFFFAOYSA-N 2-methyl-4-piperidin-1-ylaniline Chemical compound C1=C(N)C(C)=CC(N2CCCCC2)=C1 TWPRYUNMILQJSA-UHFFFAOYSA-N 0.000 description 1
- USWINTIHFQKJTR-UHFFFAOYSA-N 3-hydroxynaphthalene-2,7-disulfonic acid Chemical compound C1=C(S(O)(=O)=O)C=C2C=C(S(O)(=O)=O)C(O)=CC2=C1 USWINTIHFQKJTR-UHFFFAOYSA-N 0.000 description 1
- GRLQBYQELUWBIO-UHFFFAOYSA-N 4,6-dichlorobenzene-1,3-diol Chemical compound OC1=CC(O)=C(Cl)C=C1Cl GRLQBYQELUWBIO-UHFFFAOYSA-N 0.000 description 1
- RXCMFQDTWCCLBL-UHFFFAOYSA-N 4-amino-3-hydroxynaphthalene-1-sulfonic acid Chemical compound C1=CC=C2C(N)=C(O)C=C(S(O)(=O)=O)C2=C1 RXCMFQDTWCCLBL-UHFFFAOYSA-N 0.000 description 1
- VCJJAJXTFPNHON-UHFFFAOYSA-N 4-amino-3-hydroxynaphthalene-2-carboxylic acid Chemical compound C1=CC=C2C(N)=C(O)C(C(O)=O)=CC2=C1 VCJJAJXTFPNHON-UHFFFAOYSA-N 0.000 description 1
- MHJPTEUSFBRSKR-UHFFFAOYSA-N 4-cyclohexylcyclohexa-1,5-diene-1,4-diamine Chemical compound NC1=CCC(N)(C=C1)C1CCCCC1 MHJPTEUSFBRSKR-UHFFFAOYSA-N 0.000 description 1
- TVOSOIXYPHKEAR-UHFFFAOYSA-N 4-piperidin-1-ylaniline Chemical compound C1=CC(N)=CC=C1N1CCCCC1 TVOSOIXYPHKEAR-UHFFFAOYSA-N 0.000 description 1
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 description 1
- FEWJPZIEWOKRBE-JCYAYHJZSA-N Dextrotartaric acid Chemical compound OC(=O)[C@H](O)[C@@H](O)C(O)=O FEWJPZIEWOKRBE-JCYAYHJZSA-N 0.000 description 1
- 108010010803 Gelatin Proteins 0.000 description 1
- BZORFPDSXLZWJF-UHFFFAOYSA-N N,N-dimethyl-1,4-phenylenediamine Chemical compound CN(C)C1=CC=C(N)C=C1 BZORFPDSXLZWJF-UHFFFAOYSA-N 0.000 description 1
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 1
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Natural products NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 description 1
- 239000001913 cellulose Substances 0.000 description 1
- 229920002678 cellulose Polymers 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- UKJLNMAFNRKWGR-UHFFFAOYSA-N cyclohexatrienamine Chemical group NC1=CC=C=C[CH]1 UKJLNMAFNRKWGR-UHFFFAOYSA-N 0.000 description 1
- IJGRMHOSHXDMSA-UHFFFAOYSA-O diazynium Chemical compound [NH+]#N IJGRMHOSHXDMSA-UHFFFAOYSA-O 0.000 description 1
- 235000019441 ethanol Nutrition 0.000 description 1
- 229920000159 gelatin Polymers 0.000 description 1
- 239000008273 gelatin Substances 0.000 description 1
- 235000019322 gelatine Nutrition 0.000 description 1
- 235000011852 gelatine desserts Nutrition 0.000 description 1
- 235000011187 glycerol Nutrition 0.000 description 1
- 229910002804 graphite Inorganic materials 0.000 description 1
- 239000010439 graphite Substances 0.000 description 1
- 150000004820 halides Chemical class 0.000 description 1
- 229910052736 halogen Inorganic materials 0.000 description 1
- 150000002367 halogens Chemical class 0.000 description 1
- 229910001629 magnesium chloride Inorganic materials 0.000 description 1
- 235000011147 magnesium chloride Nutrition 0.000 description 1
- 150000007522 mineralic acids Chemical class 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 150000002790 naphthalenes Chemical class 0.000 description 1
- 150000007524 organic acids Chemical class 0.000 description 1
- 229960003742 phenol Drugs 0.000 description 1
- 230000002028 premature Effects 0.000 description 1
- 125000002924 primary amino group Chemical group [H]N([H])* 0.000 description 1
- 239000004627 regenerated cellulose Substances 0.000 description 1
- 230000001235 sensitizing effect Effects 0.000 description 1
- 235000002639 sodium chloride Nutrition 0.000 description 1
- 239000004317 sodium nitrate Substances 0.000 description 1
- 235000010344 sodium nitrate Nutrition 0.000 description 1
- 229910052938 sodium sulfate Inorganic materials 0.000 description 1
- 235000011152 sodium sulphate Nutrition 0.000 description 1
- QPILZZVXGUNELN-UHFFFAOYSA-M sodium;4-amino-5-hydroxynaphthalene-2,7-disulfonate;hydron Chemical compound [Na+].OS(=O)(=O)C1=CC(O)=C2C(N)=CC(S([O-])(=O)=O)=CC2=C1 QPILZZVXGUNELN-UHFFFAOYSA-M 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Images
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
- G03C5/18—Diazo-type processes, e.g. thermal development, or agents therefor
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S101/00—Printing
- Y10S101/29—Printing involving a color-forming phenomenon
Definitions
- This invention relates to diazo photographic processes and particularly to a process in which the image is produced electrochemically.
- Diazotype materials having a carrier of gelatin, regenerated cellulose, cellulose derivative or paper, containing a diazonium compound and a coupler are well known in the photographic art. Such materials generally contain an acid or similarly effective agents to prevent premature coupling and after exposure the coupling is brought about by treatment with ammonia gas or other alkaline medium. In electrolytic treatment of diazo material, there is no exposure to light but the alkalization is brought about by passing a current through the paper from a stylus, the pH being thereby raised locally .to permit coupling.
- an image may be formed in a diazotype material after exposure to light by passing a direct current uniformly through the material to raise the pH over the entire region of exposure, thereby producing a visible image.
- a support material such as a rather absorbent paper is coated with a diazonium compound, a coupler, an acid stabilizer and an electrolyte to assure passage of the current through the material.
- the material is then dried and exposed in the customary manner to an image.
- a positive image is used for the exposure and positive image is then produced in the diazo material.
- the paper or other exposed material is moistened slightly after exposure and then placed between two flat electrodes. direct current between the electrodes and through the exposed diazo material a positive image is produced in the material.
- this method of forming an image in the diazo material is diagrammatically represented.
- the exposed diazo material B is placed between the flat electrodes A and C with the side on which the image is to be formed, uppermost or adjacent the cathode C.
- a direct current is then passed from a supply source, not shown, through the electrodes, the positive terminal being connected to plate A and the negative terminal to plate C.
- a. current of the proper potential for a sufi'icient length of time Upon passage of a. current of the proper potential for a sufi'icient length of time a visible image is produced in the diazo material.
- the paper was then dried and exposed in the customary manner behind a positive. After exposure the paper was moistened slightly with an atomizer and placed between two flat electrodes. The cathode was a silver plate approximately 9 square centimeters in area and the anode was a graphite plate of similar area. A D. 0. potential of 22 volts was applied to the electrodes, the current being 1 to 4 amperes depending upon the moisture content of the paper. The current was passed for 0.2 to 2.0 seconds and after this time a dark reddish brown print on a pale tan field was produced.
- Variations in this method include introducing the salt into the diazo mixture instead of incorporating it in the paper support, the use of a hygroscopic material such as glycerin'in the paper to insure adequate moisture content, and the use of electrode rollers so that the process may be made continuous.
- Stainless steel electrodes may be used.
- the electrolyte must be in the support, rather than merely on the surface so that the material is conductive when the current is passed through it.
- the electrolyte may comprise any suitable water-soluble inorganic acid salt such as sodium chloride, magnesium chloride, sodium nitrate or sodium sulphate. If a halide such as a chloride is used as the electrolyte, proper precautions must be'taken to remove the corrosive halogen which is liberated at the anode.
- suitable diazo salts include the diazo salts of N-p-aminophenyl morpholine, N- p-amino-m-tolyl morpholine, N-p-aminophenyl piperidine, N-(3-methyl-4-aminophenyl) piperidine, N-p-aminom-anisylmorpholine, N-p-amino-o-chlorophenyl morpholine, the corresponding naphthalene derivatives of these compounds, 1-amino-4-dimethyl-aminobenzene, p-amino-dimethylaniline, 4 amino 1-monoethylamino-2- toluene, l-benzoylamino 2,5-diethoxy-4-ani1ine, l-amino 4 hydroxybenzene, 4-amino-l-cyclohexylaniline, the tetrazo salt of.
- diaminodiphenyl thiourea 1-amino-2-hydroXy-3-naphthoic acid, 1,2,4-aminonaphthol-sulfonic acid and similar diazo sensitizing compounds.
- B-naphthol couplers such as phloroglucionol, resorcinol, dichloro-resorcinol, a-naphthol, 2,4-dichloro-1- naphthol, H-acid, R-acid and: the like may be used.
- the acid stabilizer may be an organic or inorganic acid such as hydrochloric acid, boric acid, tartaric acid. Thiourea may also be used.
- the method of forming an image electrolytically by the diazo process which comprises incorporating a water-soluble inorganic acid salt electrolyte in an absorbent sheet material support, adding to said support an aromatic diazonium salt, an aromatic hydroxy coupling compound, and an acid stabilizer, exposing. said support to light under an image, moistening said support before passage of said after-mentioned current, placing the side of said support having said diazonium salt, coupling compound and stabilizer adjacent and in contact with the cathode plate of a direct current source, and placing the anode plate of said direct current source adjacent and in contact with the opposite side of said support, and passing a direct current uniformly through the entire area of said support to form a visible image in the unexposed regions thereof.
- the method of forming an image electro lytically by the diazo process which comprises incorporating sodium chloride as an electrolyte in an absorbent paper support, adding to said support the diazonium salt of N-(p-aminophenyl) morpholine, p-naphthol, and an acid stabilizer, exposing said support to light under an image, moistenin-g said support before passage of said after-mentioned current, placing the side of said support having said diazonium salt, coupling.
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Non-Silver Salt Photosensitive Materials And Non-Silver Salt Photography (AREA)
- Photosensitive Polymer And Photoresist Processing (AREA)
Description
Feb. 13, 1951 w. VANSELOW ET AL 2,541,488
ELECTROLYTIC DIAZO PROCESS Filed March 14, 1946 CA THODE v D 42 1 C SUPP! Y APER ANODf/ DYE FORMING MATERIALS IN OR ON UPPER SURFACE OF PAPER WALDEM U? VANSELOW HENRY C .YUTZY INVENTORS W (2. adj
A TTORNE YS Patented Feb. 13, 1951 ELECTROLYTIC DIAZO PROCESS Waldemar Vanselow and Henry C. Yutzy, Rochester, N. Y., assignors to Eastman Kodak Company, Rochester, N. Y., a corporation of New Jersey Application March 14, 1946, Serial No. 654,442
This invention relates to diazo photographic processes and particularly to a process in which the image is produced electrochemically.
Diazotype materialshaving a carrier of gelatin, regenerated cellulose, cellulose derivative or paper, containing a diazonium compound and a coupler are well known in the photographic art. Such materials generally contain an acid or similarly effective agents to prevent premature coupling and after exposure the coupling is brought about by treatment with ammonia gas or other alkaline medium. In electrolytic treatment of diazo material, there is no exposure to light but the alkalization is brought about by passing a current through the paper from a stylus, the pH being thereby raised locally .to permit coupling.
We have found that an image may be formed in a diazotype material after exposure to light by passing a direct current uniformly through the material to raise the pH over the entire region of exposure, thereby producing a visible image.
The accompanying drawing shows diagrammatically the method of forming an image in the diazotype material according to our invention.
According to our invention a support material such as a rather absorbent paper is coated with a diazonium compound, a coupler, an acid stabilizer and an electrolyte to assure passage of the current through the material. The material is then dried and exposed in the customary manner to an image. Generally a positive image is used for the exposure and positive image is then produced in the diazo material.
The paper or other exposed material is moistened slightly after exposure and then placed between two flat electrodes. direct current between the electrodes and through the exposed diazo material a positive image is produced in the material.
In the accompanying drawing this method of forming an image in the diazo material is diagrammatically represented. As shown therein the exposed diazo material B is placed between the flat electrodes A and C with the side on which the image is to be formed, uppermost or adjacent the cathode C. A direct current is then passed from a supply source, not shown, through the electrodes, the positive terminal being connected to plate A and the negative terminal to plate C. Upon passage of a. current of the proper potential for a sufi'icient length of time a visible image is produced in the diazo material.
Our invention will now be illustrated by reference to the following example:
Upon passage of a I 2 Claims. (Cl. -6)
An absorbent paper was bathed in a 5 to 10% solution of sodium chloride and was partially or completely dried. One surface was then coated with a solution of the following composition:
Diazonium compound of N (p aminophenyl) morpholine grams 1 ,B-Naphthol do 1 Hydrochloric acid cc 1 Boric acid grams 1 Tartaric acid l do 2 Thiourea do 0.1 Ethyl alcohol cc 50 Water cc 50 The paper was then dried and exposed in the customary manner behind a positive. After exposure the paper was moistened slightly with an atomizer and placed between two flat electrodes. The cathode was a silver plate approximately 9 square centimeters in area and the anode was a graphite plate of similar area. A D. 0. potential of 22 volts was applied to the electrodes, the current being 1 to 4 amperes depending upon the moisture content of the paper. The current was passed for 0.2 to 2.0 seconds and after this time a dark reddish brown print on a pale tan field was produced.
Variations in this method include introducing the salt into the diazo mixture instead of incorporating it in the paper support, the use of a hygroscopic material such as glycerin'in the paper to insure adequate moisture content, and the use of electrode rollers so that the process may be made continuous. Stainless steel electrodes may be used. The electrolyte must be in the support, rather than merely on the surface so that the material is conductive when the current is passed through it.
The electrolyte may comprise any suitable water-soluble inorganic acid salt such as sodium chloride, magnesium chloride, sodium nitrate or sodium sulphate. If a halide such as a chloride is used as the electrolyte, proper precautions must be'taken to remove the corrosive halogen which is liberated at the anode.
While we have illustrated our invention as using the diazonium compoundof N-(p-aminophenyl) -morpho1ine, fi-naphthol as the coupler, other aromatic diazonium salts and aromatic hydroxy coupling compounds may be employed. For example, suitable diazo salts include the diazo salts of N-p-aminophenyl morpholine, N- p-amino-m-tolyl morpholine, N-p-aminophenyl piperidine, N-(3-methyl-4-aminophenyl) piperidine, N-p-aminom-anisylmorpholine, N-p-amino-o-chlorophenyl morpholine, the corresponding naphthalene derivatives of these compounds, 1-amino-4-dimethyl-aminobenzene, p-amino-dimethylaniline, 4 amino 1-monoethylamino-2- toluene, l-benzoylamino 2,5-diethoxy-4-ani1ine, l-amino 4 hydroxybenzene, 4-amino-l-cyclohexylaniline, the tetrazo salt of. diaminodiphenyl thiourea, 1-amino-2-hydroXy-3-naphthoic acid, 1,2,4-aminonaphthol-sulfonic acid and similar diazo sensitizing compounds. Instead of B-naphthol, couplers such as phloroglucionol, resorcinol, dichloro-resorcinol, a-naphthol, 2,4-dichloro-1- naphthol, H-acid, R-acid and: the like may be used. The acid stabilizer may be an organic or inorganic acid such as hydrochloric acid, boric acid, tartaric acid. Thiourea may also be used.
The modifications and examples included herein are illustrative only and it will be understood that our invention is to be taken as limited only by the scope of the appended claims.
We claim:
1. The method of forming an image electrolytically by the diazo process, which comprises incorporating a water-soluble inorganic acid salt electrolyte in an absorbent sheet material support, adding to said support an aromatic diazonium salt, an aromatic hydroxy coupling compound, and an acid stabilizer, exposing. said support to light under an image, moistening said support before passage of said after-mentioned current, placing the side of said support having said diazonium salt, coupling compound and stabilizer adjacent and in contact with the cathode plate of a direct current source, and placing the anode plate of said direct current source adjacent and in contact with the opposite side of said support, and passing a direct current uniformly through the entire area of said support to form a visible image in the unexposed regions thereof.
2. The method of forming an image electro lytically by the diazo process which comprises incorporating sodium chloride as an electrolyte in an absorbent paper support, adding to said support the diazonium salt of N-(p-aminophenyl) morpholine, p-naphthol, and an acid stabilizer, exposing said support to light under an image, moistenin-g said support before passage of said after-mentioned current, placing the side of said support having said diazonium salt, coupling. compound and stabilizer adjacent and in contact with the cathode plate of a direct current source and placing the anode plate of said direct current source adjacent and in contact with the opposite side of said support, and passing a direct current uniformly through the entire area of said support to form a visible image in the unexposed regions thereof.
WALDEMAR VANSELOW. HENRY C. YUTZY.
REFERENCES CITED The following references are of record in the file. of this patent:
UNITED STATES PATENTS.
Number Name Date 1,444,469 Kogel Feb. 6, 1923 1,892,099 Cornell Dec. 2'7, 1932 1,970,539 Bausch Aug. 21, 1934 2,306,471 Solomon Dec. 29, 1942 2,433,632 Solomon Dec. 30, 1947 FOREIGN PATENTS Number Country Date 317,444 Germany Dec. 16, 1919 358,584 Germany Sept. 12, 1922 464,112 Great Britain Apr. 12, 1937
Claims (1)
1. THE METHOD OF FORMING AN IMAGE ELECTROLYTICALLY BY THE DIAZO PROCESS, WHICH COMPRISES INCORPORATING A WATER-SOLUBLE INORGANIC ACID SALT ELECTROLYTE IN AN ABSORBENT SHEET MATERIAL SUPPORT, ADDING TO SAID SUPPORT AN AROMATIC DIAZONIUM SALT, AND AROMATIC HYDROXY COUPLING COMPOUND, AND AN ACID STABILIZER, EXPOSING SAID SUPPORT TO LIGHT UNDER AN IMAGE, MOISTENING SAID SUPPORT BEFORE PASSAGE OF SAID AFTER-MENTIONED CURRENT, PLACING THE SIDE OF SAID SUPPORT HAVING SAID DIAZONIUM SALT, COUPLING COMPOUND AND STABILIZER ADJACENT AND IN CONTACT WITH THE CATHODE PLATE OF A DIRECT CURRENT SOURCE, AND PLACING THE ANODE PLATE OF SAID DIRECT CURRENT SOURCE ADJACENT AND IN CONTACT WITH THE OPPOSITE SIDE OF SAID SUPPORT, AND PASSING A DIRECT CURRENT UNIFORMLY THROUGH THE ENTIRE AREA OF SAID SUPPORT TO FOAM A VISIBLE IMAGE IN THE UNEXPOSED REGIONS THEREOF.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US654442A US2541488A (en) | 1946-03-14 | 1946-03-14 | Electrolytic diazo process |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US654442A US2541488A (en) | 1946-03-14 | 1946-03-14 | Electrolytic diazo process |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| US2541488A true US2541488A (en) | 1951-02-13 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US654442A Expired - Lifetime US2541488A (en) | 1946-03-14 | 1946-03-14 | Electrolytic diazo process |
Country Status (1)
| Country | Link |
|---|---|
| US (1) | US2541488A (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3010883A (en) * | 1956-03-30 | 1961-11-28 | Minnesota Mining & Mfg | Electrolytic electrophotography |
| US3016338A (en) * | 1958-08-04 | 1962-01-09 | Hogan Faximile Corp | Electrolytic recording paper |
| US3316088A (en) * | 1963-02-11 | 1967-04-25 | Ibm | Process of electrophotography based on electrophotolytic reactions and element therefor |
| US3445654A (en) * | 1966-12-30 | 1969-05-20 | Gaf Corp | Reflex copying process and apparatus employing infrared exposure and electrolytic development |
| US3954462A (en) * | 1972-04-07 | 1976-05-04 | Keuffel & Esser Company | Electrolytically induced polymerization utilizing diazotization of primary aromatic amines |
| US4452877A (en) * | 1982-08-26 | 1984-06-05 | American Hoechst Corporation | Electrolysis treatment of light sensitive diazo coated supports |
| US4549944A (en) * | 1981-08-28 | 1985-10-29 | Hoechst Aktiengesellschaft | Electrochemical developing process for reproduction layers |
| US20190031446A1 (en) * | 2016-02-01 | 2019-01-31 | Autostore Technology AS | Cleaning bin for cleaning a storage grid of a storage system |
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| US1444469A (en) * | 1917-05-31 | 1923-02-06 | Firm Of Kalle & Co Ag | Manufacture of light copy paper |
| US1892099A (en) * | 1931-03-03 | 1932-12-27 | Forbes Lithograph Mfg Co | Modifying photographic images |
| US1970539A (en) * | 1931-02-22 | 1934-08-21 | Jr Viktor Bausch | Process for electrochemically producing stable images and characters |
| GB464112A (en) * | 1934-10-13 | 1937-04-12 | Fritz Goldmann | Photographic process |
| US2306471A (en) * | 1937-12-08 | 1942-12-29 | Rca Corp | Electrolytic facsimile recording |
| US2433632A (en) * | 1942-12-23 | 1947-12-30 | Rca Corp | Fibrous sheet material for the electrolytic formation of azo dye image records thereon |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE317444C (en) * | ||||
| DE358584C (en) * | 1922-09-12 | Artur Gruenert Dr | Method of fixing and blackening pencil drawings on paper | |
| US1444469A (en) * | 1917-05-31 | 1923-02-06 | Firm Of Kalle & Co Ag | Manufacture of light copy paper |
| US1970539A (en) * | 1931-02-22 | 1934-08-21 | Jr Viktor Bausch | Process for electrochemically producing stable images and characters |
| US1892099A (en) * | 1931-03-03 | 1932-12-27 | Forbes Lithograph Mfg Co | Modifying photographic images |
| GB464112A (en) * | 1934-10-13 | 1937-04-12 | Fritz Goldmann | Photographic process |
| US2306471A (en) * | 1937-12-08 | 1942-12-29 | Rca Corp | Electrolytic facsimile recording |
| US2433632A (en) * | 1942-12-23 | 1947-12-30 | Rca Corp | Fibrous sheet material for the electrolytic formation of azo dye image records thereon |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3010883A (en) * | 1956-03-30 | 1961-11-28 | Minnesota Mining & Mfg | Electrolytic electrophotography |
| US3016338A (en) * | 1958-08-04 | 1962-01-09 | Hogan Faximile Corp | Electrolytic recording paper |
| US3316088A (en) * | 1963-02-11 | 1967-04-25 | Ibm | Process of electrophotography based on electrophotolytic reactions and element therefor |
| US3445654A (en) * | 1966-12-30 | 1969-05-20 | Gaf Corp | Reflex copying process and apparatus employing infrared exposure and electrolytic development |
| US3954462A (en) * | 1972-04-07 | 1976-05-04 | Keuffel & Esser Company | Electrolytically induced polymerization utilizing diazotization of primary aromatic amines |
| US4549944A (en) * | 1981-08-28 | 1985-10-29 | Hoechst Aktiengesellschaft | Electrochemical developing process for reproduction layers |
| US4452877A (en) * | 1982-08-26 | 1984-06-05 | American Hoechst Corporation | Electrolysis treatment of light sensitive diazo coated supports |
| US20190031446A1 (en) * | 2016-02-01 | 2019-01-31 | Autostore Technology AS | Cleaning bin for cleaning a storage grid of a storage system |
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