GB551183A - Improvements relating to the manufacture of photo-mechanical printing surfaces - Google Patents

Improvements relating to the manufacture of photo-mechanical printing surfaces

Info

Publication number
GB551183A
GB551183A GB8660/41A GB866041A GB551183A GB 551183 A GB551183 A GB 551183A GB 8660/41 A GB8660/41 A GB 8660/41A GB 866041 A GB866041 A GB 866041A GB 551183 A GB551183 A GB 551183A
Authority
GB
United Kingdom
Prior art keywords
invisible ink
stipple
markings
invisible
photo
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
GB8660/41A
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.)
LAWRENCE APPLETON TILL
Cooperative Wholesale Society Ltd
Original Assignee
LAWRENCE APPLETON TILL
Cooperative Wholesale Society 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 LAWRENCE APPLETON TILL, Cooperative Wholesale Society Ltd filed Critical LAWRENCE APPLETON TILL
Priority to GB8660/41A priority Critical patent/GB551183A/en
Publication of GB551183A publication Critical patent/GB551183A/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
    • G03F5/00—Screening processes; Screens therefor

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Printing Methods (AREA)

Abstract

551,183. Photo-mechanical printing-surfaces. CO-OPERATIVE WHOLESALE SOCIETY Ltd., and TILL, L. A. July 9, 1941, No. 8660. [Class 98 (ii)] [Also in Group XV] A process of producing a printing surface as by photoengraving from an original of the kind prepared by printing on a paper or like sheet a stipple of lines, dots &c. in invisible ink, making on the sheet a drawing of the matter to be reproduced, and treating the sheet with an agent which renders the stipple visible at the areas where. it is desired, is characterized in that the invisible ink stipple markings have additional markings of smaller area printed over them in a different invisible ink or in a resist medium in order to permit selection of intensity of stipple. The stipple markings may all be printed in invisible ink as shown for a single element at X, Y, Z, Fig. 4, the upper markings being progressively smaller and capable of removal in turn by application of solvent before the selected set is rendered visible; or each marking may comprise an area X printed in invisible ink protected with one or more different resist coatings Y, Z, e.g. collodion and gum, which may be washed off selectively so as to lay bare only certain areas of the invisible ink markings before treatment to render them visible. The expression invisible ink includes any ink which will not reproduce in the photo-engraving process. Examples of invisible inks, with the appropriate developers in brackets,' are : lead base paint (sodium sulphide), nut galls and calcined sulphate of iron (water), ferric sulphate (nut galls or potassium ferrocyanide), copper sulphate (potassium ferrocyanide), cobalt nitrate (oxalic acid), Fowler's solution (copper nitrate), and soda lye or sodium carbonate (phenolphthalein); the inks may be mixed with binders such as gum arabic, varnish, spirit, or. cellulose compounds; and the developers may be applied as with a brush, glass pen, or rubber rod, or may be put up in solid crayon form.
GB8660/41A 1941-07-09 1941-07-09 Improvements relating to the manufacture of photo-mechanical printing surfaces Expired GB551183A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB8660/41A GB551183A (en) 1941-07-09 1941-07-09 Improvements relating to the manufacture of photo-mechanical printing surfaces

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB8660/41A GB551183A (en) 1941-07-09 1941-07-09 Improvements relating to the manufacture of photo-mechanical printing surfaces

Publications (1)

Publication Number Publication Date
GB551183A true GB551183A (en) 1943-02-11

Family

ID=9856762

Family Applications (1)

Application Number Title Priority Date Filing Date
GB8660/41A Expired GB551183A (en) 1941-07-09 1941-07-09 Improvements relating to the manufacture of photo-mechanical printing surfaces

Country Status (1)

Country Link
GB (1) GB551183A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5395739A (en) * 1992-12-15 1995-03-07 Mitsubishi Denki Kabushiki Kaisha Method for producing field effect transistor

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5395739A (en) * 1992-12-15 1995-03-07 Mitsubishi Denki Kabushiki Kaisha Method for producing field effect transistor
GB2273578B (en) * 1992-12-15 1996-06-12 Mitsubishi Electric Corp Method for producing field effect transistor and pattern mask therefor
US5547789A (en) * 1992-12-15 1996-08-20 Mitsubishi Denki Kabushiki Kaisha Pattern transfer mask

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