DE494372C - Process for producing partial screen negatives for multi-color printing - Google Patents
Process for producing partial screen negatives for multi-color printingInfo
- Publication number
- DE494372C DE494372C DED55015D DED0055015D DE494372C DE 494372 C DE494372 C DE 494372C DE D55015 D DED55015 D DE D55015D DE D0055015 D DED0055015 D DE D0055015D DE 494372 C DE494372 C DE 494372C
- Authority
- DE
- Germany
- Prior art keywords
- partial screen
- color printing
- negatives
- producing partial
- screen negatives
- 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
- G03F3/04—Colour separation; Correction of tonal value by photographic means
Description
Verfahren, Teilrasternegative für den Mehrfarbendruck herzustellen Die Erfindung betrifft die Herstellung von Teilrasternegativen für den Mehrfarbendruck.Process for producing partial screen negatives for multi-color printing The invention relates to the production of partial screen negatives for multicolor printing.
Die üblichen Methoden, Teilrasternegative für den Dreifarbendruck herzustellen, erfordern große Gewandtheit des Operateurs.The usual methods, partial screen negatives for three-color printing require great skill on the part of the surgeon.
Das vorliegende Verfahren ermöglicht dagegen auch dem Laien, diese Arbeit zu verrichten. Das wird erreicht, indem die nach den bekannten Verfahren hergestellten Diapositive in natürlichen Farben zugleich mit Skalenrastern und Trockenfiltern auf photographische Platten kopiert werden. Im folgenden sei der Arbeitsvorgang geschildert.The present procedure, however, also enables laypeople to do this To do work. This is achieved by following the known procedures produced slides in natural colors at the same time with scale grids and dry filters copied onto photographic plates. The following is the working process described.
In einen gewöhnlichen Kopierrahmen wird zuerst ein Trockenfilter violetter Färbung, darauf eine Lumiereaufnahme, darauf ein Skalenraster und darauf eine photomechanische Platte gelegt. Die Kopierung geschieht mit einer Punktlichtquelle, da die Schicht der Lumiereplatte von der Schicht der photomechanischen Platte zwei Glasdicken entfernt ist. Nach der Kopierung erfolgt in üblicher Weise die Entwicklung. Das Resultat ist ein in Schwarz und Weiß zerlegtes Netznegativ. Vorbelichtu.ng ist nur schwierig auszuführen, aber auch nicht nötig, da eine richtig hergestellte Farbenaufnahme naturgemäß immer dieselbe Spannung der Tonskala aufweist. Die Rot- und Blauaufnahme erfolgt mit entsprechenden Filtern in gleicher Weise.In an ordinary copier frame, a dry filter first becomes purple Color, on it a Lumiere image, on it a scale grid and on it a photomechanical one Plate laid. The copying is done with a point light source as the layer the Lumiere plate removed two glass thicknesses from the layer of the photomechanical plate is. After copying, development takes place in the usual way. The result is a network negative broken down into black and white. Pre-exposure is just difficult to be carried out, but also not necessary, since a correctly produced color recording naturally always has the same tension on the tone scale. The red and blue shot takes place in the same way with the corresponding filters.
Natürlich ist es auch möglich, auf indirekte Art in derselben Weise zu arbeiten. Doch ist die Arbeit dann unsicherer, da ein Halbtonteilnegativ schwerer herzustellen ist. Allerdings hat man dann größeren Spielraum in der Retusche.Of course it is also possible in an indirect way in the same way to work. But then the work is less secure because a semitone negative is more difficult is to be established. However, you then have more leeway in retouching.
Der Arbeitsgang bei der Herstellung der Rasternegative auf indirekte Art ist der folgende: In üblicher Weise werden nach einer farbigen Aufnahme mittels Filtern Halbtonnegative und von diesen wieder Halbtondiapositive hergestellt. Diese Schwarzdiapositive werden zugleich mit Skalenrastern auf photographische Platten kopiert, und zwar mit entsprechender Vor- oder Nachbelichtung des Rasters. Da die Herstellung der Schwarzdiapositive entweder im Kopierrahmen oder in billigen Vergrößerungsapparaten bzw. Kameras erfolgen kann, bietet auch dieser Weg einen technischen Fortschritt; denn die ganze Herstellung ist nicht nur dem Laien .möglich, sondern es kann auch mit den billigsten Herstellungsmitteln gearbeitet werden.The process of making the halftone negatives on indirect Type is the following: In the usual way, after a colored recording means Filter halftone negatives and make halftone slides from them again. These Black slides are placed on photographic plates at the same time as scale grids copied, with the appropriate pre- or post-exposure of the raster. Since the Production of black slides either in a copier frame or in cheap enlargers or cameras can take place, this way also offers a technical advance; because the whole production is not only possible for the layman, but it can also the cheapest means of production are used.
Claims (2)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DED55015D DE494372C (en) | 1928-02-13 | 1928-02-14 | Process for producing partial screen negatives for multi-color printing |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DED0055015 | 1928-02-13 | ||
| DED55015D DE494372C (en) | 1928-02-13 | 1928-02-14 | Process for producing partial screen negatives for multi-color printing |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| DE494372C true DE494372C (en) | 1933-08-26 |
Family
ID=25972614
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DED55015D Expired DE494372C (en) | 1928-02-13 | 1928-02-14 | Process for producing partial screen negatives for multi-color printing |
Country Status (1)
| Country | Link |
|---|---|
| DE (1) | DE494372C (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2692825A (en) * | 1946-12-14 | 1954-10-26 | Colour Separation Tech Inc | Color correcting in photomechanical processes |
-
1928
- 1928-02-14 DE DED55015D patent/DE494372C/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2692825A (en) * | 1946-12-14 | 1954-10-26 | Colour Separation Tech Inc | Color correcting in photomechanical processes |
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