GB551183A - Improvements relating to the manufacture of photo-mechanical printing surfaces - Google Patents
Improvements relating to the manufacture of photo-mechanical printing surfacesInfo
- 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
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.
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)
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 |
-
1941
- 1941-07-09 GB GB8660/41A patent/GB551183A/en not_active Expired
Cited By (3)
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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