GB267541A - Process for the preparation of flat printing forms for single and multi-colour printing - Google Patents
Process for the preparation of flat printing forms for single and multi-colour printingInfo
- Publication number
- GB267541A GB267541A GB6751/27A GB675127A GB267541A GB 267541 A GB267541 A GB 267541A GB 6751/27 A GB6751/27 A GB 6751/27A GB 675127 A GB675127 A GB 675127A GB 267541 A GB267541 A GB 267541A
- Authority
- GB
- United Kingdom
- Prior art keywords
- printing
- colour
- points
- negatives
- 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
- G03F3/00—Colour separation; Correction of tonal value
- G03F3/02—Colour separation; Correction of tonal value by retouching
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Printing Methods (AREA)
Abstract
267,541. Dresdener Etiquetten-Fabrik Schupp &. Nierth Akt.-Ges. March 10, 1926, [Convention date]. Photo-mechanical printing-surfaces; retouching. -For the production of flat printing surfaces for single or multi-colour printing, all the necessary tone and colour retouch is performed on screendiapositives by reducing or increasing the size of the screen points by photo-chemical reagents prior to obtaining negatives therefrom on inextensible film material, from which negatives the printing surface or surfaces are produced. Local intensification is effected by potassium and mercury iodide : and reduction by Farmer's reagent. For protecting parts not requiring modification black japan may be used, and subsequently removed by benzol. To obviate any continuing or after effect of the reducing solution a neutralizing solution of sodium bicarbonate mav be used. After the local retouching operations and washing and drying, those points of the dried diapositive which are to be printed not as points but as surfaces are rendered non-transparent with colour or ink.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE267541X | 1926-03-10 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB267541A true GB267541A (en) | 1928-02-16 |
Family
ID=5997571
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB6751/27A Expired GB267541A (en) | 1926-03-10 | 1927-03-10 | Process for the preparation of flat printing forms for single and multi-colour printing |
Country Status (2)
| Country | Link |
|---|---|
| FR (1) | FR630623A (en) |
| GB (1) | GB267541A (en) |
-
1927
- 1927-03-10 GB GB6751/27A patent/GB267541A/en not_active Expired
- 1927-03-10 FR FR630623D patent/FR630623A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| FR630623A (en) | 1927-12-06 |
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