DE742553C - Process for reproducing colored originals - Google Patents

Process for reproducing colored originals

Info

Publication number
DE742553C
DE742553C DEB195245D DEB0195245D DE742553C DE 742553 C DE742553 C DE 742553C DE B195245 D DEB195245 D DE B195245D DE B0195245 D DEB0195245 D DE B0195245D DE 742553 C DE742553 C DE 742553C
Authority
DE
Germany
Prior art keywords
color
colored originals
reproducing colored
color separations
reproducing
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
DEB195245D
Other languages
German (de)
Inventor
Dr Otto Mittelstaedt
Dr Emil Rupp
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.)
BIBLIOGRAPHISCHES INST AG
Original Assignee
BIBLIOGRAPHISCHES INST AG
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 BIBLIOGRAPHISCHES INST AG filed Critical BIBLIOGRAPHISCHES INST AG
Priority to DEB195245D priority Critical patent/DE742553C/en
Application granted granted Critical
Publication of DE742553C publication Critical patent/DE742553C/en
Expired legal-status Critical Current

Links

Classifications

    • GPHYSICS
    • G03PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03FPHOTOMECHANICAL PRODUCTION OF TEXTURED OR PATTERNED SURFACES, e.g. FOR PRINTING, FOR PROCESSING OF SEMICONDUCTOR DEVICES; MATERIALS THEREFOR; ORIGINALS THEREFOR; APPARATUS SPECIALLY ADAPTED THEREFOR
    • G03F3/00Colour separation; Correction of tonal value
    • G03F3/04Colour separation; Correction of tonal value by photographic means

Landscapes

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

Description

Verfahren zur Reproduktion farbiger Vorlagen Das den Gegenstand der Erfindung bildende Verfahren zur Reproduktion farbiger Vorlagen bezieht sich darauf; daß nicht breite, sondern möglichst schmale Filterbereiche bzw. Spektralbezirke für die Farbauszüge benutzt werden.Process for reproducing colored originals That is the subject of the Invention forming methods for reproducing colored originals relates to this; that not wide, but rather narrow filter ranges or spectral regions can be used for the color separations.

Soweit in älteren Patentschriften gelegentlich die Bezeichnungen Hellrot, Mittelrot, Dunkelrot, Hellblau, Mittelblau, Dunkelblau auftreten und damit Teilfarb.enauszüge gemeint sind, kann es sich nicht um die Verwendung von Filtern zur Herstellung der Farbauszüge handeln. Eine Möglichkeit, durch Verwendung schmaler Filter bessere Farbspaltung zu erreichen, war bei den verwendeten unempfindlichen Emulsionen nicht gegeben. Vielmehr wurde z. B. Hellrot von Mittelrot bei gleichem Grünfilter durch die Belichtungszeit und besonders durch eingehende Retusche von Har,4d getrennt. Wenn man bei Halbtonaufnahmen Schmalfilter zur Aufnahme der Farbauszüge verwendet, so besteht die Gefahr, daß Farbanteile, die in verschiedenen Mischungen enthalten sind, leim Farb.auszuge nicht mit berücksichtigt werden, weil die betreffenden schmalen Filter - für diese Farbanteile keinen Durchlaß.bereich haben. Man kann dann dem Original nur dadurch möglichst nahekommen, daß man mit einer möglichst großen Anzahl schmaler Filter arbeitet, wodurch möglichst viele Farbbereiche einzeln herausgezogen werden. Dieses Verfahren hat jedoch den Nachteil, daß man beim Druck entgegen den Reproduktionsverfahren mit breiten Filtern verhältnismäßig viele Farben benötigt und so den Druck erheblich verteuert, wenn auch seine Qualität unbedingt besser wird.As far as in older patent specifications the terms light red, Medium red, dark red, light blue, medium blue, dark blue occur and thus partial color extracts are meant, it can not involve the use of filters to produce the Act color separations. One way of doing better by using narrower filters It was not possible to achieve color splitting with the insensitive emulsions used given. Rather, z. B. Light red from medium red with the same green filter the exposure time and especially by detailed retouching from Har, 4d separated. If narrow filters are used to record the color separations in halftone recordings, there is a risk that color components contained in different mixtures are, glue color extracts are not taken into account because the relevant narrow Filters - have no pass range for these color components. You can then do that The only way to get as close as possible to the original by working with as large a number as possible narrow filter works, whereby as many color areas as possible are individually extracted will. However, this method has the disadvantage that when you press against the Reproduction processes with wide filters require a relatively large number of colors and so the print is considerably more expensive, even if its quality is definitely better will.

Aber selbst dann, wenn zur Gewinnung der, .Farbauszüge sehr viele Filter verwendet «erden, kann die Anzahl der für den Druck not«#endigen Farben -erheblich eingeschräet werden. Hierzu ist es nur erforderlich, dar man die Farbauszüge von zwei oder mehr nebeneinanderliegenden Filterbereichen zusammen kopiert und den so gewonnenen Kombinationsfarbenauszug mit einer aus den zu ihrer Zusammensetzung notwendigen Spektralbereichen gebildeten Mischfarbe druckt. Auch ist es angängig, durch geeignete Auswahl von Mischungen aus nicht nebeneinanderliegenden Spektralbereichen Mischfarben zu gewinnen, durch die sich eine zweckmäßige Farbeinschränkung für den Druck ergibt. Wesentlich bleibt, daß man einen möglichst exakten Ausgangspunkt gewinnt, indem man solche Vielfarbenauszüge ermittelt, die in geeigneter Kombination die geringstmrigliche Anzahl von Farben bedingen.But even if to obtain the, .Color separations very many Filters used «Ground, the number of times needed for printing may end Colors - are significantly reduced. For this it is only necessary to be able to use the Color separations from two or more adjacent filter areas copied together and the combination color extract obtained in this way with one of the to their composition necessary spectral ranges formed mixed color prints. It is also possible by suitable selection of mixtures from non-adjacent spectral ranges To win mixed colors, through which an appropriate color restriction for the Pressure results. It remains essential that one obtains a starting point that is as exact as possible, by determining such multicolor separations which, in a suitable combination, the require a minimal number of colors.

Claims (1)

PATENTANSPRUCH: Verfahren zur Reproduktion farbiger Vorlagen, dadurch gekennzeichnet, daß für die Farbauszüge photographische Aufnahmen durch mehr als drei schmale Filterbereiche benutzt werden, wobei durch Kombination von zwei oder mehr Farbauszügen zu Mischfarbenauszügen die zu druckende Farbenzahl auf sechs bis drei eingeschränkt wird.PATENT CLAIM: Process for reproducing colored originals, thereby characterized that for the color separations photographic recordings by more than three narrow filter areas can be used, whereby by combining two or more color separations to mixed color separations the number of colors to be printed to six to three is restricted.
DEB195245D 1941-08-16 1941-08-17 Process for reproducing colored originals Expired DE742553C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DEB195245D DE742553C (en) 1941-08-16 1941-08-17 Process for reproducing colored originals

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DEB0195245 1941-08-16
DEB195245D DE742553C (en) 1941-08-16 1941-08-17 Process for reproducing colored originals

Publications (1)

Publication Number Publication Date
DE742553C true DE742553C (en) 1943-12-07

Family

ID=25969009

Family Applications (1)

Application Number Title Priority Date Filing Date
DEB195245D Expired DE742553C (en) 1941-08-16 1941-08-17 Process for reproducing colored originals

Country Status (1)

Country Link
DE (1) DE742553C (en)

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