GB1204917A - Photographic printing plates - Google Patents

Photographic printing plates

Info

Publication number
GB1204917A
GB1204917A GB2303768A GB2303768A GB1204917A GB 1204917 A GB1204917 A GB 1204917A GB 2303768 A GB2303768 A GB 2303768A GB 2303768 A GB2303768 A GB 2303768A GB 1204917 A GB1204917 A GB 1204917A
Authority
GB
United Kingdom
Prior art keywords
layer
dye
photo
sensitive
nov
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
Application number
GB2303768A
Inventor
Frank Edward Smith
Peter John Smith
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.)
Howson Algraphy Ltd
Original Assignee
Howson Algraphy Ltd
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 Howson Algraphy Ltd filed Critical Howson Algraphy Ltd
Priority to GB2303768A priority Critical patent/GB1204917A/en
Priority to DE19681808481 priority patent/DE1808481A1/en
Publication of GB1204917A publication Critical patent/GB1204917A/en
Expired legal-status Critical Current

Links

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
    • G03F7/09—Photosensitive materials characterised by structural details, e.g. supports, auxiliary layers
    • G03F7/105—Photosensitive materials characterised by structural details, e.g. supports, auxiliary layers having substances, e.g. indicators, for forming visible images

Landscapes

  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Structural Engineering (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Photosensitive Polymer And Photoresist Processing (AREA)
  • Printing Plates And Materials Therefor (AREA)

Abstract

1,204,917. Photo-sensitive materials. ALGRAPHY Ltd. Nov.1, 1968 [Nov.14, 1967; May 15, 1968], Nos.51680/67 and 23037/68. Heading G2C. A photo-sensitive material comprises a support carrying a photo-sensitive layer and in that layer or in a sub or in overcoated layer a stabilized vat dye such as an indigosol dye which undergoes a colour change on exposure to light. Specified photosensitive layers are bicromated colloids, quinone diazides in novolak binders, nitroaldehydes, nitronaphthalene sulphonic acids and cinnamate esters of polyvinyl alcohol, starch, cellulose and epoxyresins. If the dye is in a layer other than the photo-sensitive layer it may be in a binder such as polyvinyl acetate, shellac or cellulose acetate phthalate. The material may be imagewise exposed to produce a dye image in the exposed areas and the unexposed areas removed to leave a printing plate. If a quinone diazide is used, the exposed areas are removed on alkaline development. A sensitizer such as a ketone, a nitro compound, an anthraquinone, an anthrone or a thiazoline may be added to the photo-polymerisable layer. An additional dye or pigment may be added to the vat dye layer to improve the contrast of the image with respect to its background.
GB2303768A 1967-11-14 1967-11-14 Photographic printing plates Expired GB1204917A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
GB2303768A GB1204917A (en) 1967-11-14 1967-11-14 Photographic printing plates
DE19681808481 DE1808481A1 (en) 1967-11-14 1968-11-13 Photographic printing plates

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB5168067 1967-11-14
GB2303768A GB1204917A (en) 1967-11-14 1967-11-14 Photographic printing plates

Publications (1)

Publication Number Publication Date
GB1204917A true GB1204917A (en) 1970-09-09

Family

ID=26256271

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2303768A Expired GB1204917A (en) 1967-11-14 1967-11-14 Photographic printing plates

Country Status (2)

Country Link
DE (1) DE1808481A1 (en)
GB (1) GB1204917A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1981001756A1 (en) * 1979-12-07 1981-06-25 Minnesota Mining & Mfg Diazonium imaging system
FR2500645A1 (en) * 1981-02-20 1982-08-27 Polychrome Corp RADIATION SENSITIVE COMPOSITION, SENSITIVE ELEMENT COATING THE SAME, AND REPRODUCTIVE FILM PREPARED THEREFROM
GB2131190A (en) * 1982-11-01 1984-06-13 Gen Electric A method of enhancing the contrast of images and materials therefor
US4486518A (en) * 1981-02-20 1984-12-04 Polychrome Corporation Duplicating film mask with radiation absorbing benzophenone in processed positive-working radiation sensitive layer on transparent substrate

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL8002231A (en) * 1980-04-16 1981-11-16 Mecanorma Sa IMAGE REPRODUCTION ELEMENT; METHOD FOR REPRODUCING AN IMAGE.

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1981001756A1 (en) * 1979-12-07 1981-06-25 Minnesota Mining & Mfg Diazonium imaging system
FR2500645A1 (en) * 1981-02-20 1982-08-27 Polychrome Corp RADIATION SENSITIVE COMPOSITION, SENSITIVE ELEMENT COATING THE SAME, AND REPRODUCTIVE FILM PREPARED THEREFROM
US4486518A (en) * 1981-02-20 1984-12-04 Polychrome Corporation Duplicating film mask with radiation absorbing benzophenone in processed positive-working radiation sensitive layer on transparent substrate
GB2131190A (en) * 1982-11-01 1984-06-13 Gen Electric A method of enhancing the contrast of images and materials therefor

Also Published As

Publication number Publication date
DE1808481A1 (en) 1969-08-14

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Legal Events

Date Code Title Description
PS Patent sealed
PLE Entries relating assignments, transmissions, licences in the register of patents
PCNP Patent ceased through non-payment of renewal fee