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GB189123A - Improvements in the process for the preparation of photocollographic plates for printing with greasy ink - Google Patents

Improvements in the process for the preparation of photocollographic plates for printing with greasy ink

Info

Publication number
GB189123A
GB189123A GB31025/22A GB3102522A GB189123A GB 189123 A GB189123 A GB 189123A GB 31025/22 A GB31025/22 A GB 31025/22A GB 3102522 A GB3102522 A GB 3102522A GB 189123 A GB189123 A GB 189123A
Authority
GB
United Kingdom
Prior art keywords
printing
negative
photocollographic
plates
preparation
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
GB31025/22A
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.)
MARIANO DE SPERATI
Original Assignee
MARIANO DE SPERATI
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 MARIANO DE SPERATI filed Critical MARIANO DE SPERATI
Publication of GB189123A publication Critical patent/GB189123A/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
    • G03F7/14—Production of collotype printing forms

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Printing Methods (AREA)
  • Silver Salt Photography Or Processing Solution Therefor (AREA)

Abstract

189,123. Sperati, M. de. Nov. 17, 1921. [Convention date]. Photo-mechanical printing-surfaces.-In a process for converting a negative into a printing- surface by resensitizing with bichromate and exposing it from the back, the negative is treated after exposure and washing, with a solution of iodine, for example in potassium iodide, which imparts a clear colour to the image and enables the inking operation to be controlled, and which also imparts compactness and strength to the gelatine image layer. The negative may be subjected to a preliminary treatment in a bath of bichloride of mercury and ammonia, as described in Specification 162,640.
GB31025/22A 1921-11-17 1922-11-13 Improvements in the process for the preparation of photocollographic plates for printing with greasy ink Expired GB189123A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT189123X 1921-11-17

Publications (1)

Publication Number Publication Date
GB189123A true GB189123A (en) 1923-07-12

Family

ID=11153639

Family Applications (1)

Application Number Title Priority Date Filing Date
GB31025/22A Expired GB189123A (en) 1921-11-17 1922-11-13 Improvements in the process for the preparation of photocollographic plates for printing with greasy ink

Country Status (3)

Country Link
DE (1) DE392752C (en)
FR (1) FR27584E (en)
GB (1) GB189123A (en)

Also Published As

Publication number Publication date
FR27584E (en) 1924-07-31
DE392752C (en) 1924-03-25

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