DE290725C - - Google Patents

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Publication number
DE290725C
DE290725C DENDAT290725D DE290725DA DE290725C DE 290725 C DE290725 C DE 290725C DE NDAT290725 D DENDAT290725 D DE NDAT290725D DE 290725D A DE290725D A DE 290725DA DE 290725 C DE290725 C DE 290725C
Authority
DE
Germany
Prior art keywords
grid
color plates
color
copied
color printing
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.)
Active
Application number
DENDAT290725D
Other languages
German (de)
Publication of DE290725C publication Critical patent/DE290725C/de
Active 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
    • G03F5/02—Screening processes; Screens therefor by projection methods
    • G03F5/04—Screening processes; Screens therefor by projection methods changing the screen effect

Landscapes

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

Description

KAISERLICHESIMPERIAL

PATENTAMT.PATENT OFFICE.

Die weitere Ausbildung des in dem Hauptpatent 276691 angegebenen Verfahrens hat zu der überraschenden Beobachtung geführt, daß es bei der Anwendung dieses Verfahrens in der Chromolithographie, bei dem die dunkleren Farben, welche allein ein sichtbares Moiree veranlassen, niemals auf das Weiß des Papiers, sondern stets auf vorgedruckte helle Farben fallen, nicht erforderlich ist, die Rasterlage für die einzelnen Farbplatten zu verändern, sondern daß man zweckmäßig von jeder Winkelung absieht und alle Farbplatten in der gleichen Rasterlage kopiert. Dabei wurde festgestellt, daß die auf letztere Weise erhaltenen Reproduktionen ruhiger wirken und die Zeichnung besser wiedergeben als bei Anwendung von Farbplatten mit verschiedener Rasterlage. Moireebildung, die man bei ungewinkelten Farbplatten im Drei- und Vierfarbendruck zu befürchten hat, auch Überdeckungsfehler treten nicht auf, da beim Auflegen des Rasters die Lage der Linien bzw. Öffnungen fast niemals aufeinanderfallen können.The further development of the method specified in the main patent 276691 has to led to the surprising observation that when this method is used in Chromolithography, in which the darker colors, which alone are a visible moiré never on the white of the paper, but always on preprinted light colors it is not necessary to change the grid position for the individual color plates, but that one expediently refrains from any angulation and all color plates in the same grid position copied. It was found that those obtained in the latter manner Reproductions appear calmer and reproduce the drawing better than when used of color plates with different grid positions. Moire formation, which can be seen with angled Color plates in three- and four-color printing have to fear, overlap errors also occur not because when the grid is placed, the position of the lines or openings almost never occurs can collide.

Die Vermeidung der Rasterdrehung bedeutet nicht allein eine große Vereinfachung des Verfahrens, sondern auch eine beträchtliche Kostenersparnis, indem ein gewöhnlicher rechteckiger Raster genügt, um alle Farbplatten bis zur vollen Rastergröße zu kopieren.Avoiding the grid rotation does not only mean a great simplification of the process, but also a considerable cost saving by adding an ordinary rectangular Grid is sufficient to copy all color plates up to the full grid size.

Claims (1)

Patent-Anspruch:Patent claim: Ausbildung des Kopierrasterverfahrens nach Patent 276691 für Mehrfarbendruck, dadurch gekennzeichnet, daß alle zu einem Satz gehörenden Negative in der gleichen Rasterrichtung kopiert werden.Development of the copy raster process according to patent 276691 for multi-color printing, characterized in that all negatives belonging to a sentence are in the same Grid direction can be copied.
DENDAT290725D Active DE290725C (en)

Publications (1)

Publication Number Publication Date
DE290725C true DE290725C (en)

Family

ID=545659

Family Applications (1)

Application Number Title Priority Date Filing Date
DENDAT290725D Active DE290725C (en)

Country Status (1)

Country Link
DE (1) DE290725C (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6890108B2 (en) 2002-08-14 2005-05-10 Carl Zeiss Jean Gmbh Light-mixing rod

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6890108B2 (en) 2002-08-14 2005-05-10 Carl Zeiss Jean Gmbh Light-mixing rod

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