US2178338A - Production of gelatin printing reliefs - Google Patents

Production of gelatin printing reliefs Download PDF

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Publication number
US2178338A
US2178338A US250358A US25035839A US2178338A US 2178338 A US2178338 A US 2178338A US 250358 A US250358 A US 250358A US 25035839 A US25035839 A US 25035839A US 2178338 A US2178338 A US 2178338A
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US
United States
Prior art keywords
gelatin
layer
relief
production
developer
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
Application number
US250358A
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English (en)
Inventor
Frankenburger Walter
Rossler Georg
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
GAF Chemicals Corp
Original Assignee
Agfa Ansco Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Agfa Ansco Corp filed Critical Agfa Ansco Corp
Application granted granted Critical
Publication of US2178338A publication Critical patent/US2178338A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • G03F7/06—Silver salts

Definitions

  • the present invention relates to the production of gelatin printing reliefs.
  • the ,silver halide layer is exposed behind the negative to be printed either in contact or by projection.
  • Development followsin a developer which hardens the gelatin proportionally to the developed silver or permits the silver to remain in a form which makes it unsuitable for catalyzing the liquefaction effect on the gelatin of the hydrogen peroxide etching process.
  • an ordinary developer for instance a glycin developer or a l -hydroxy 4 -methylaininobenzenesulfate hydroquinone developer, and subsequently by means of a known hardening bath containing, for instance copper sulfate and bichromate, harden the gelatin proportionally to the silver and thus make it resistant to etching.
  • the residual undeveloped silver halide is now reduced to silver. This may be done by exposure to diffused light and developing with a developer which does not affect and the removal of the unhardened gelatin occurs only at the silver of the second developed image, so that as a result there remains a positive relief corresponding with the first developed 5 image.
  • the process is not limited to the use of ordinary black and white negatives but with obvious modification is applicable for producing correct color copies or enlargements from color negatives, for instance the complementary color neg- 5 atives of the three-layer color development process.
  • a film carrying an emulsion comparatively poor 10 in silver is exposed behind a Lei'ca negative by projection and developed at 18 C. with a developer of the following composition:
  • a gelatin relief by the hydrogen peroxide etching method comprising exposing a. silver halide gelatin emulsion layer through the 1 support of said layer, producing the latent image by development, hardening the gelatin proportionally to the developed silver, exposing the layer 60 to diffused light, treatingthe layer with a developer incapable of affecting the gelatin, and transforming the layer to a relief;
  • the improvement which comprises exposing a silver halide gelatin emulsion layer under said negative through the support of said layer, producing the latent image by development, hardening the gelatin proportionally to the developed silver, exposing the layer to diffused light, treating the layer with a developer incapable of affecting the gelatin, and transforming the layer to a relief.
  • the improvement which comprises exposinga silver halide gelatin emulsion layer under said positive through the support of said layer, producing the latent image by development, hardening-the gelatin proportionally to the developed silver, exposing the layer to diffused light, treating the layer with a developer incapable of afiecting the gelatin, and transforming the layer to a relief.
  • the improvement which comprises exposing a silver halide gelatin emulsion layer through the support of said layer, producing the latent image by development, the developer being capable of hardening the gelatin proportionally to the tieveloped silver, exposing the layer to difl'used light, treating the layer with a developer incapable of affecting the gelatin, and transforming the layer to a relief.
  • the improvement which comprises exposing a silver halide gelatin emulsion layer through the support or said layer, producing the latent image by development, the developer being capable of converting the silver into a compound resistant to etching with hydrogen peroxide, exposing the layer to diffused light, treating the layer with a developer incapable of affecting the gelatin, and transforming the layer to a relief.

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Silver Salt Photography Or Processing Solution Therefor (AREA)
  • Photosensitive Polymer And Photoresist Processing (AREA)
US250358A 1938-01-12 1939-01-11 Production of gelatin printing reliefs Expired - Lifetime US2178338A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE2178338X 1938-01-12

Publications (1)

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US2178338A true US2178338A (en) 1939-10-31

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ID=7988765

Family Applications (1)

Application Number Title Priority Date Filing Date
US250358A Expired - Lifetime US2178338A (en) 1938-01-12 1939-01-11 Production of gelatin printing reliefs

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US (1) US2178338A (en))
BE (1) BE432116A (en))

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2854386A (en) * 1955-02-07 1958-09-30 Aladdin Ind Inc Method of photographically printing conductive metallic patterns
US2875051A (en) * 1954-05-03 1959-02-24 Chemical Products Corp Relief printing plates and method for fabricating the same
US2927858A (en) * 1956-05-11 1960-03-08 Wolfgang Muth Method of producing printing surfaces
US3053658A (en) * 1955-06-09 1962-09-11 Gestetner Ltd Photolithography
US3634083A (en) * 1968-01-22 1972-01-11 Itek Corp Photographic process for producing relief images by extended physical development

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2875051A (en) * 1954-05-03 1959-02-24 Chemical Products Corp Relief printing plates and method for fabricating the same
US2854386A (en) * 1955-02-07 1958-09-30 Aladdin Ind Inc Method of photographically printing conductive metallic patterns
US3053658A (en) * 1955-06-09 1962-09-11 Gestetner Ltd Photolithography
US2927858A (en) * 1956-05-11 1960-03-08 Wolfgang Muth Method of producing printing surfaces
US3634083A (en) * 1968-01-22 1972-01-11 Itek Corp Photographic process for producing relief images by extended physical development

Also Published As

Publication number Publication date
BE432116A (en))

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