US3421895A - Process for developing diazotype materials - Google Patents

Process for developing diazotype materials Download PDF

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Publication number
US3421895A
US3421895A US515857A US3421895DA US3421895A US 3421895 A US3421895 A US 3421895A US 515857 A US515857 A US 515857A US 3421895D A US3421895D A US 3421895DA US 3421895 A US3421895 A US 3421895A
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United States
Prior art keywords
developing
development
film
monomethylamine
lower aliphatic
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Expired - Lifetime
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US515857A
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English (en)
Inventor
Frank W Haining
Bernard I Halperin
James O Thompson
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International Business Machines Corp
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International Business Machines Corp
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    • 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

  • the present invention relates to a new process for the development of diazotype materials including papers, films and plates.
  • the purpose of the invention is to provide a new method for developing diazotype materials at high speeds.
  • diazotype materials can be developed at much faster rates, sometimes exceeding ten times those achieved by use of anhydrous ammonia.
  • the present invention comprises developing two component diazotype materials by contacting them with lower aliphatic amines, especially monomethylamine, at pressures above atmospheric and preferably above about p.s.i.g. Additional speed is obtained by increasing the pressure up to about 30 p.s.i.g., but above that level little additional advantage is to be gained.
  • the aliphatic amine developing agent may be used in the pure anhydrous state, either alone or in admixture with other lower aliphatic amines, or may be mixed with diluent vapors, either inert or reactive. Air and water vapor are examples of diluents which may be mixed with the amine developer.
  • inert gases such as the well known Freon gases, may be employed.
  • Freon 12 diichloro difiuoro methane
  • monomethylamine or other lower aliphatic amine developing agents to provide a highly satisfactory developer.
  • the present method also has the advantage that it is not limited to operation at any specific temperature, but may be conducted at ambient temperature or elevated temperatures without any disadvantage. In some cases, additional speed may be gained by operating at elevated temperatures. In the case of higher boiling lower aliphatic amines, it may be necessary to warm the amine reservoir and/ or the developing chamber to provide and maintain the developer in the vapor state.
  • the developing process may be conducted in an uncomplicated device which need only provide for the admission of the developing vapors into a chamber, where the vapors are applied to the surface of a two-component diazotype element and for maintenance of the developer vapors or gas under pressure for a brief period of time. 1
  • the present process may be applied to standard twocomponent diazotype films, plates and papers.
  • Such materials usually comprise a support of paper, transparent film or the like provided with a coating of light-sensitive diazonium salts and couplers.
  • the composition ordinarily will also contain a pH modifying agent to maintain the composition at a pH level below that at which the coupler and diazonium salt will react.
  • Other conventional additives to the composition include buifers, antioxidants and other materials known to the art.
  • the present method for developing such conventional two-component diazotype materials is a vast improvement over conventional aqueous alkaline systems and, unexpectedly, is also a striking improvement over the high pressure'development of such films with anhydrous ammonia.
  • the magnitude of the improvement is demonstrated in the following description of a preferred embodiment of the invention as compared with high pressure development with anhydrous ammonia.
  • MYSPH Film (Tecnifax Corporation) was used as the starting material.
  • This film is of a conventional two-component formulation and is intended for development by aqueous ammonia according to procedures now most commonly employed in the art.
  • the apparatus used for developing the film included a film sample chamber and means for instantaneously adding a gaseous developing agent to the film sample chamber.
  • the chamber had a very small volume formed by sandwiching the sample between two closely fitting surfaces so that very little dead space or volume remained. After removal of the air from around the sample, the developing vapor was admitted to the chamber under control of a fast acting valve system which permitted dwell times of 0.05 second and above for the developer.
  • the developing gas was exhausted from the film chamber, air was admitted, and the sample was removed.
  • gaseous monomethylamine as a developing agent has also been demonstrated with other two-component diazotype coatings and films, such as K- tone, also manufactured by Tecnifax Corporation, and Unit Gamma, manufactured by General Aniline and Film Company.
  • K- tone also manufactured by Tecnifax Corporation
  • Unit Gamma manufactured by General Aniline and Film Company.
  • the effectiveness of the other members of the group of lower aliphatic amines in the vapor state and under pressure has also been demonstrated.
  • Lower aliphatic amines such as dimethylamine, trimethylamine, and monoethylamine, have shown themselves to be satisfactory and to give comparable results when used alone or mixed with diluents as described above.
  • the rate of the coupling reaction between a light-sensitive diazo salt and a coupler is determined primarily by the concentration of the reactants, the pH of the system, and the temperature at which the reaction occurs. It is, therefore, unexpected that the developing rate of such materials can be so dramatically increased by utilizing lower aliphatic amines in the gaseous state under pressure as a developing agent.
  • a method for developing a two-component diazotype element comprising contacting said element with vapors of a lower aliphatic amine compound at a pressure above about 5 p.s.i.g. for a period sufiicient to yield a visible image.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Non-Silver Salt Photosensitive Materials And Non-Silver Salt Photography (AREA)
US515857A 1965-12-23 1965-12-23 Process for developing diazotype materials Expired - Lifetime US3421895A (en)

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Application Number Priority Date Filing Date Title
US51585765A 1965-12-23 1965-12-23

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US3421895A true US3421895A (en) 1969-01-14

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US515857A Expired - Lifetime US3421895A (en) 1965-12-23 1965-12-23 Process for developing diazotype materials

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US (1) US3421895A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
DE (1) DE1572016C3 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
FR (1) FR1505815A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
GB (1) GB1144379A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
NL (1) NL6617817A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4135814A (en) * 1976-05-28 1979-01-23 Hoechst Aktiengesellschaft Process and apparatus for the production of photocopies using two-component diazotype material

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT165325B (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) *
US2308058A (en) * 1940-10-03 1943-01-12 Huey Co Developer for diazo prints
US3203797A (en) * 1962-10-16 1965-08-31 Andrews Paper & Chem Co Inc Thermal diazotype method and developer sheet for use therein
US3331690A (en) * 1964-06-08 1967-07-18 Ibm Development of diazotype papers without a coupler

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT165325B (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) *
US2308058A (en) * 1940-10-03 1943-01-12 Huey Co Developer for diazo prints
US3203797A (en) * 1962-10-16 1965-08-31 Andrews Paper & Chem Co Inc Thermal diazotype method and developer sheet for use therein
US3331690A (en) * 1964-06-08 1967-07-18 Ibm Development of diazotype papers without a coupler

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4135814A (en) * 1976-05-28 1979-01-23 Hoechst Aktiengesellschaft Process and apparatus for the production of photocopies using two-component diazotype material

Also Published As

Publication number Publication date
DE1572016A1 (de) 1970-02-19
FR1505815A (fr) 1967-12-15
NL6617817A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) 1967-06-26
DE1572016C3 (de) 1974-05-30
GB1144379A (en) 1969-03-05
DE1572016B2 (de) 1973-11-08

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