US1966755A - Process of preparing diazo-types - Google Patents
Process of preparing diazo-types Download PDFInfo
- Publication number
- US1966755A US1966755A US641321A US64132132A US1966755A US 1966755 A US1966755 A US 1966755A US 641321 A US641321 A US 641321A US 64132132 A US64132132 A US 64132132A US 1966755 A US1966755 A US 1966755A
- Authority
- US
- United States
- Prior art keywords
- diazo
- light
- sensitive
- instance
- solution
- 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
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
Definitions
- Photographic papers are known whose lightsensitive layer chiefly consists of a light-sensitive diazo compound. These known papers, after exposure to light under a pattern, yield pictures, if they are treated under suitable conditions with a solution of an azo component. This process of treating the pictures with a liquid developer involves, however, a great drawback in comparison with certain other papers which permit the production of pictures by the simple action of ammonia gas without the aid of any liquid.
- the present invention relates to a process of preparing diazo-types. It comprises subjecting a material sensitized by means of a light sensitive tern or design and then causing the vapors of an aromatic amine, which is volatile to a'certain degree and capable of coupling with diazocompounds, to act upon the material thus treated. 2
- a dyestuff is formed at those portions of the sensitive material which were not exposed to light.
- a positive dyestufi picture is obtained from a positive design and vice versa.
- the after. treatment with the aromatic amine can he carried out'in different ways.
- the amine may be vaporized and the vaporsthus obtained act upon the exposure material.
- the amine is dissolved in a suitable solvent, for instance alcohol, and a support, such as blotting paper, paper, tissue or the like is impregnated with this solution and, after evaporation of the solvent, brought in contact with the exposed material. Thereby, vapors of the amine rise from the impregnated support and act upon those portions of the diazo compound in the sensitive material which have not been destroyed by light.
- a suitable solvent for instance alcohol
- a support such as blotting paper, paper, tissue or the like
- aromatic dia'z'o compound to light under a pata simple apparatus, which does not take much.
- the film mass is impregnated with a solution of a diazo compound in a solvent which is capable of penetrating into the film mass; or there is applied on the film a solution of the diazo compound in a solvent, which vaporizes rapidly, but at the same time rapidly penetrates into the film; or there is applied on the film a colloidal solution, for instance collodion, or a more or less aqueous gelatine solution in which the light-sensitive diazo compound has been dissolved: or there is vaporized on a provisional support, for instance on a metal strap, a colloidal solution, for instance collodion, or a solution of methyloellulose, in which the light-sensitive diazo compound has been dissolved.
- the light-sensitive diazo compound bodies such as metal salts, which are capable of altering the shade of the dyestuffs obtained by the development or of forming with these dyestuffs insoluble colorlakes.
- hygroscopic bodies for instance glycerine or calcium chloride, which promote the development by retaining in the film or paper a rather large quantity of hygroscopic humidity.
- products may likewise be added, which are destined to modify or ameliorate the proper-H ties of the pictures obtained or to increase the stability of the light-sensitive preparation, for instance organic acids. Products, such as thiourea, may also be added in order to preserve the pure whites or lights of the pictures.
- a solution for sensitizing paper or films from transparent regenerated cellulose there may be utilized, for instance, an aqueous solution containing 1 per cent of the diazo chloride obtained by diazotizing the hydrochloride of para-amino diphenyl-amine, 2 per cent of tartaric acid and 8 I per cent of glycerine.
- diazo chloride obtained by diazotizing the hydrochloride of para-amino diphenyl-amine
- tartaric acid 2 per cent of tartaric acid
- 8 I per cent of glycerine there may be used all diazo compounds usual in diazo-type- 110 a metal salts.
- a strip of blotting paper or tissue has been impregnated with a 6 per cent alcoholic solution of an aromatic mono-or di-amine capable of coupling with diazo compounds and being volatile in a certain degree, such as alpha-naphthylamine or meta-toluylene-diamine having a considerable vapor tension at ordinary temperature; the said strips have been allowed to dry and a sort of book has been composed therefrom which is placed into a metal envelope.
- the prints to be developed are placed between the foils of the said book and left therein for a sumciently long time, for instance, for half an hour in the case of prints produced on the paper prepared as above described. Pictures are obtained which have a blue shade when alpha-naphthylamine has been used,
- vapors of amines serving for the development may, of course, also be produced under other conditions, for instance in a heated vessel containing the amine or an alcoholic solution thereof. It is also possible to carry out a continuous dea machine comprising feedfeeding devices, consisting of cylinders coated with endless tissue or felt which has previously been impregnated with an amine.
- a nitrocellulose film provided with a layer of gelatine is impregnated with a solution of 2.5 parts by weight of the zinc chloride double salt of the diazo-compound of p-aminoethylbenzylaniline, 0.8 parts by volume of tartaric acid and 10 parts by volume of glycerine in parts byvolume of water.
- the process of preparing diazotypes which comprises exposing a material sensitized by means of light-sensitive aromatic diazo compounds to light under a pattern and then treatingit with the vapors of an aromatic amine capable of coupling with diazo compounds.
- diazotypes which comprises exposing a material sensitized by means of light-sensitive aromatic diazo compounds to light under a pattern and then treating it with a dry support which has been impregnated with a volatile aromatic amine capable of coupling with diazo compounds.
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Non-Silver Salt Photosensitive Materials And Non-Silver Salt Photography (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR398671X | 1931-11-09 |
Publications (1)
Publication Number | Publication Date |
---|---|
US1966755A true US1966755A (en) | 1934-07-17 |
Family
ID=8896632
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US641321A Expired - Lifetime US1966755A (en) | 1931-11-09 | 1932-11-04 | Process of preparing diazo-types |
Country Status (4)
Country | Link |
---|---|
US (1) | US1966755A (it) |
DE (1) | DE581394C (it) |
FR (1) | FR741172A (it) |
GB (1) | GB398671A (it) |
Cited By (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2541886A (en) * | 1947-12-20 | 1951-02-13 | Gen Aniline & Film Corp | Aliphatic nitro compounds as azo coupling components |
US2542715A (en) * | 1945-07-16 | 1951-02-20 | Gen Aniline & Film Corp | Multicolor diazotype layers |
US2542716A (en) * | 1945-07-16 | 1951-02-20 | Gen Aniline & Film Corp | Multicolor diazotype layers |
US2571671A (en) * | 1946-01-18 | 1951-10-16 | Hartford Nat Bank & Trust Co | Process of producing photographic contrasts |
US2571670A (en) * | 1946-01-21 | 1951-10-16 | Hartford Nat Bank & Trust Co | Method of producing photographic contrasts |
US2688543A (en) * | 1950-12-20 | 1954-09-07 | Gen Aniline & Film Corp | Poly-acetoacetyl derivatives of polyamines as azo components in diazotype photoprinting material |
US2774669A (en) * | 1953-04-13 | 1956-12-18 | Dick Co Ab | Diazotype reproduction process |
US2789904A (en) * | 1953-09-17 | 1957-04-23 | Gen Aniline & Film Corp | Diazo print process |
US3046128A (en) * | 1958-07-03 | 1962-07-24 | Dietzgen Co Eugene | Thermally developable diazotype photoprinting material and production thereof |
US3772017A (en) * | 1970-01-27 | 1973-11-13 | Kalle Ag | Diazo-type developing process |
US4770973A (en) * | 1985-11-15 | 1988-09-13 | Kanzaki Paper Manufacturing Limited | Heat-sensitive diazo recording material with diphenyl alkene coupler |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB1143702A (it) * | 1965-03-18 |
-
0
- FR FR741172D patent/FR741172A/fr not_active Expired
-
1932
- 1932-10-29 DE DEK127573D patent/DE581394C/de not_active Expired
- 1932-11-04 US US641321A patent/US1966755A/en not_active Expired - Lifetime
- 1932-11-09 GB GB31676/32A patent/GB398671A/en not_active Expired
Cited By (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2542715A (en) * | 1945-07-16 | 1951-02-20 | Gen Aniline & Film Corp | Multicolor diazotype layers |
US2542716A (en) * | 1945-07-16 | 1951-02-20 | Gen Aniline & Film Corp | Multicolor diazotype layers |
US2571671A (en) * | 1946-01-18 | 1951-10-16 | Hartford Nat Bank & Trust Co | Process of producing photographic contrasts |
US2571670A (en) * | 1946-01-21 | 1951-10-16 | Hartford Nat Bank & Trust Co | Method of producing photographic contrasts |
US2541886A (en) * | 1947-12-20 | 1951-02-13 | Gen Aniline & Film Corp | Aliphatic nitro compounds as azo coupling components |
US2688543A (en) * | 1950-12-20 | 1954-09-07 | Gen Aniline & Film Corp | Poly-acetoacetyl derivatives of polyamines as azo components in diazotype photoprinting material |
US2774669A (en) * | 1953-04-13 | 1956-12-18 | Dick Co Ab | Diazotype reproduction process |
US2789904A (en) * | 1953-09-17 | 1957-04-23 | Gen Aniline & Film Corp | Diazo print process |
US3046128A (en) * | 1958-07-03 | 1962-07-24 | Dietzgen Co Eugene | Thermally developable diazotype photoprinting material and production thereof |
US3772017A (en) * | 1970-01-27 | 1973-11-13 | Kalle Ag | Diazo-type developing process |
US4770973A (en) * | 1985-11-15 | 1988-09-13 | Kanzaki Paper Manufacturing Limited | Heat-sensitive diazo recording material with diphenyl alkene coupler |
Also Published As
Publication number | Publication date |
---|---|
GB398671A (en) | 1933-09-21 |
FR741172A (it) | 1933-02-08 |
DE581394C (de) | 1933-07-26 |
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