EP0526795A1 - Process for the production of a photographic image - Google Patents

Process for the production of a photographic image Download PDF

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Publication number
EP0526795A1
EP0526795A1 EP92112415A EP92112415A EP0526795A1 EP 0526795 A1 EP0526795 A1 EP 0526795A1 EP 92112415 A EP92112415 A EP 92112415A EP 92112415 A EP92112415 A EP 92112415A EP 0526795 A1 EP0526795 A1 EP 0526795A1
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EP
European Patent Office
Prior art keywords
silver
density
color
image
silver halide
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Granted
Application number
EP92112415A
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German (de)
French (fr)
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EP0526795B1 (en
Inventor
Kaspar Wingender
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Agfa Gevaert AG
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Agfa Gevaert AG
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Classifications

    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03C—PHOTOSENSITIVE MATERIALS FOR PHOTOGRAPHIC PURPOSES; PHOTOGRAPHIC PROCESSES, e.g. CINE, X-RAY, COLOUR, STEREO-PHOTOGRAPHIC PROCESSES; AUXILIARY PROCESSES IN PHOTOGRAPHY
    • G03C7/00—Multicolour photographic processes or agents therefor; Regeneration of such processing agents; Photosensitive materials for multicolour processes
    • G03C7/22—Subtractive cinematographic processes; Materials therefor; Preparing or processing such materials
    • G03C7/24—Subtractive cinematographic processes; Materials therefor; Preparing or processing such materials combined with sound-recording
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B42—BOOKBINDING; ALBUMS; FILES; SPECIAL PRINTED MATTER
    • B42D—BOOKS; BOOK COVERS; LOOSE LEAVES; PRINTED MATTER CHARACTERISED BY IDENTIFICATION OR SECURITY FEATURES; PRINTED MATTER OF SPECIAL FORMAT OR STYLE NOT OTHERWISE PROVIDED FOR; DEVICES FOR USE THEREWITH AND NOT OTHERWISE PROVIDED FOR; MOVABLE-STRIP WRITING OR READING APPARATUS
    • B42D25/00—Information-bearing cards or sheet-like structures characterised by identification or security features; Manufacture thereof
    • B42D25/30—Identification or security features, e.g. for preventing forgery
    • B42D25/309—Photographs
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B42—BOOKBINDING; ALBUMS; FILES; SPECIAL PRINTED MATTER
    • B42D—BOOKS; BOOK COVERS; LOOSE LEAVES; PRINTED MATTER CHARACTERISED BY IDENTIFICATION OR SECURITY FEATURES; PRINTED MATTER OF SPECIAL FORMAT OR STYLE NOT OTHERWISE PROVIDED FOR; DEVICES FOR USE THEREWITH AND NOT OTHERWISE PROVIDED FOR; MOVABLE-STRIP WRITING OR READING APPARATUS
    • B42D25/00—Information-bearing cards or sheet-like structures characterised by identification or security features; Manufacture thereof
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B42—BOOKBINDING; ALBUMS; FILES; SPECIAL PRINTED MATTER
    • B42D—BOOKS; BOOK COVERS; LOOSE LEAVES; PRINTED MATTER CHARACTERISED BY IDENTIFICATION OR SECURITY FEATURES; PRINTED MATTER OF SPECIAL FORMAT OR STYLE NOT OTHERWISE PROVIDED FOR; DEVICES FOR USE THEREWITH AND NOT OTHERWISE PROVIDED FOR; MOVABLE-STRIP WRITING OR READING APPARATUS
    • B42D25/00—Information-bearing cards or sheet-like structures characterised by identification or security features; Manufacture thereof
    • B42D25/40—Manufacture
    • B42D25/405—Marking
    • B42D25/415—Marking using chemicals
    • B42D25/42—Marking using chemicals by photographic processes
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03C—PHOTOSENSITIVE MATERIALS FOR PHOTOGRAPHIC PURPOSES; PHOTOGRAPHIC PROCESSES, e.g. CINE, X-RAY, COLOUR, STEREO-PHOTOGRAPHIC PROCESSES; AUXILIARY PROCESSES IN PHOTOGRAPHY
    • G03C7/00—Multicolour photographic processes or agents therefor; Regeneration of such processing agents; Photosensitive materials for multicolour processes
    • G03C7/30—Colour processes using colour-coupling substances; Materials therefor; Preparing or processing such materials
    • G03C7/3017—Colour processes using colour-coupling substances; Materials therefor; Preparing or processing such materials with intensification of the image by oxido-reduction
    • G03C7/302—Colour processes using colour-coupling substances; Materials therefor; Preparing or processing such materials with intensification of the image by oxido-reduction using peroxides
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S430/00—Radiation imagery chemistry: process, composition, or product thereof
    • Y10S430/145—Infrared

Definitions

  • ID cards that contain machine-readable information in addition to an image of the cardholder are becoming increasingly common.
  • the trend is towards colored portraits of the cardholder, which are created using a standard color photographic process.
  • This process starts from a silver halide color photographic material that is exposed and developed and includes a silver removal step consisting of bleaching and fixing, in which all silver and silver halide is removed, and the clear color image produced from color couplers in the material and the oxidation product of the p- Phenylenediamine developer substance which emerges, machine-readable information, usually information which can be read by infrared light, cannot be applied in this way, since the dyes produced have only very little IR absorption and the silver, which shows sufficient IR absorption, has been removed, as is known.
  • the object of the invention was therefore to find a method for producing an ID card, in which, starting from a color photographic silver halide material, both a clear color image and an IR-readable silver image are easily generated in another part of the image.
  • This task is solved by a so-called development enhancement process, in which the development initially produces a color image which is overlaid by the silver image which is formed at the same time.
  • the reinforcement cut with H 2 0 2 only the color image, but not the silver image, is then amplified in the areas in which color coupler has not yet been converted, depending on the silver formed. This differentiates between color and silver gradation. As a result, the increasing silver density is overlaid by the area of maximum color density.
  • the data of the IR-readable area are imaged with a greater intensity than the data of the colored area.
  • the areas I and 11 can be spatially separated from one another.
  • the photographic material used is in particular a material which contains on a support, in particular a reflective support, at least one blue-sensitive silver halide emulsion layer containing at least one yellow coupler, at least one green-sensitive silver halide emulsion layer containing at least one magenta coupler and at least one red-sensitive silver halide emulsion layer containing at least one cyan coupler
  • Silver halides contain at least 97 mol% of silver chloride and at most 3 mol% of AgBr and the silver halide coating, indicated as AgN0 3 , is more than 0.6 g / m 2 , in particular 0.75 to 1.5 g / m 2 , wherein the layer or layers of each color sensitivity has a total silver halide application of at least 0.12 g / m 2 , expressed as AgN0 3 .
  • the silver halide emulsions are preferably negative working.
  • the photographic material also contain a further coupler-free silver halide layer that only produces a silver image that can be read in IR light.
  • the material can contain non-light-sensitive layers, so-called auxiliary layers.
  • auxiliary layers The number and sequence of these layers depend on the quality requirements placed on the material. Yellow, purple, and cyan couplers are the compounds commonly used in photography.
  • the light-sensitive material can further contain the following auxiliaries: antifoggants, hardeners, plasticizers, polymeric latices, UV absorbers, formalin scavengers, stains, development accelerators, whiteners, matting agents, lubricants, antistatic agents, wetting agents and similar compounds.
  • the light-sensitive material can be exposed in a known manner.
  • the following light sources can be used for the exposure; Tungsten, halogen, xenon, mercury lamps, CRT tubes, LED and FOT.
  • the color of the exposure source can be adjusted with color filters so that a color-neutral image is created.
  • An exposure device is particularly suitable in which the exposure original is measured in the form of many pixels, the measurement signals are digitized, processed, stored and used again for exposure by means of CRT.
  • the exposed and processed material can be used as such as an ID card.
  • an ID card is laminated on one or both sides with a transparent film.
  • Such a unit is particularly scratch-resistant, stable and protected against counterfeiting and modification.
  • a suitable material for such a laminate consists of a plastic or paper and a heat seal layer. At least part of the ID card produced as described must absorb IR light in a range above 750 nm or higher, preferably at 850-950 nm. Readability can be achieved both in transmitted light and in reflection. The prerequisite is that the sensitivity of the reader is matched to the properties of the material.
  • Infrared readable characters can be BAR or OCR code characters.
  • a color photographic recording material was produced by applying the following layers in the order given to a support made of paper coated on both sides with polyethylene.
  • the amounts given relate in each case to 1 m 2.
  • the corresponding amounts of AgNO 3 are given for the silver halide application.
  • Example 3 (comparison)
  • Example 1 The material of Example 1 was processed as follows:
  • Example 1 the proportion of silver density, measured as IR density, in the image areas important for a portrait up to a density of 1.5 is significantly lower in Example 1 according to the invention than in Example 2 produced without color enhancement.
  • Table 1 for example 1
  • Table 2 for example 2
  • Table 3 for example 3

Abstract

A process for the production of a photographic image, especially of an identity card, using a colour-photographic silver halide material on a reflecting support with a region I in which information is recorded in the form of a coloured image, and a region II in which data which can be read with infrared light are recorded, by processing with the steps (a) exposure, (b) development with a colour developer, (c) treatment with H2O2 or a compound which releases H2O2, (d) fixing without bleaching before or during the fixing, (e) washing or stabilising and (f) drying, where steps (b) and (c) can be combined to one step, leads both to a clear colour image and to a silver image which can be IR-read with sufficient reliability if steps (a) and (b) are carried out in such a way that the maximum silver density in the region II after processing is at least 0.35, preferably at least 0.5, measured in reflection at 850 nm, and the maximum silver density in the region I after processing is at most 0.5 in fields of a neutral colour density of at most 1.5, and is at most 0.4 in fields of a yellow, magenta or cyan colour extract density of at most 1.5, measured in reflection at 850 nm.

Description

ID-Karten, die neben einem Bildnis des Karteninhabers eine maschinenlesbare Information enthalten, werden zunehmend gebräuchlicher. Der Trend geht dabei zu farbigen Bildnissen des Karteninhabers, die mittels eines üblichen farbfotografischen Verfahrens erzeugt werden. Dieses Verfahren geht von einem farbfotografischen Silberhalogenidmaterial aus, das belichtet und entwickelt wird, und beinhaltet eine Silberentfernungsstufe bestehend aus Bleichen und Fixieren, in der alles Silber und Silberhalogenid entfernt wird und das klare Farbbild, erzeugt aus im Material befindlichen Farbkupplern und dem Oxidationsprodukt der p-Phenylendiaminentwicklersubstanz, hervortritt, Maschinenlesbare Informationen, üblicherweise mit Infrarotlicht lesbare Information, können so nicht aufgebracht werden, da die erzeugten Farbstoffe nur eine sehr geringe IR-Absorption aufweisen und das Silber, das ausreichende IR-Absorption zeigt, bekanntlich entfernt wurde.ID cards that contain machine-readable information in addition to an image of the cardholder are becoming increasingly common. The trend is towards colored portraits of the cardholder, which are created using a standard color photographic process. This process starts from a silver halide color photographic material that is exposed and developed and includes a silver removal step consisting of bleaching and fixing, in which all silver and silver halide is removed, and the clear color image produced from color couplers in the material and the oxidation product of the p- Phenylenediamine developer substance which emerges, machine-readable information, usually information which can be read by infrared light, cannot be applied in this way, since the dyes produced have only very little IR absorption and the silver, which shows sufficient IR absorption, has been removed, as is known.

Nach EP-A-0 342 601 soll diese Schwierigkeit dadurch überwunden werden, indem man entweder trotz Bleichens der ganzen ID-Karte das Silber nur teilweise entfernt in der Hoffnung, im Datenteil werde mehr Silber erzeugt, von dem ein Teil zurückbleibe, wenn das Silber über dem Farbbild bereits ausreichend entfernt sei, oder indem man nur einen Teil der ID-Karte dem Bleichmittel aussetze und den Teil, der die IR-lesbare Information trägt, vom Bleichmittel oder seiner Wirkung freihält Beide Verfahren sind mit soviel Unsicherheiten behaftet, daß eine praktische Nutzung nicht möglich ist, weil im ersten Fall leicht auch im Datenteil zu viel Silber entfernt wird oder durch zu geringe Silberentfernung das Farbbild trübe und unansehnlich wird, während im zweiten Fall eine klare Trennung zwischen zu bleichendem Bildteil und nicht zu bleichendem Bildteil nur unter sehr aufwendigen Vorkehrungen möglich wird.According to EP-A-0 342 601, this difficulty is to be overcome by either only partially removing the silver, despite bleaching the entire ID card, in the hope that more silver will be produced in the data part, part of which will remain if the silver is sufficiently removed from the color image, or by exposing only a part of the ID card to the bleach and keeping the part that carries the IR-readable information free from the bleach or its effects.There are so many uncertainties in these methods that a practical one Use is not possible, because in the first case too much silver is easily removed from the data part or the color image becomes cloudy and unsightly due to insufficient silver removal, while in the second case a clear separation between the image part to be bleached and the part not to be bleached is only very complex Precautions will be possible.

Aufgabe der Erfindung war daher, ein Verfahren zur Herstellung einer ID-Karte zu finden, bei dem ausgehend von einem farbfotografischen Silberhalogenidmaterial in einfacher Weise sowohl ein klares Farbbild als auch in einem anderen Bildteil ein IR-lesbares Silberbild erzeugt werden.The object of the invention was therefore to find a method for producing an ID card, in which, starting from a color photographic silver halide material, both a clear color image and an IR-readable silver image are easily generated in another part of the image.

Diese Aufgabe wird durch ein sogenanntes Entwicklungsverstärkungsverfahren gelöst, bei dem durch die Entwicklung zunächst ein Farbbild erzeugt wird, das durch das gleichzeitig entstehende Silberbild überlagert wird. Im Verstärkungsschnitt mit H202 wird dann in den Bereichen, in denen noch nicht umgesetzter Farbkuppler vorhanden ist, in Abhängigkeit vom entstandenen Silber nur das Farbbild, nicht aber das Silberbild verstärkt. Hierdurch differenzieren sich Farb- und Silbergradation. Dies hat zur Folge, daß die ansteigende Silberdichte von dem Bereich maximaler Farbdichte überlagert wird.This task is solved by a so-called development enhancement process, in which the development initially produces a color image which is overlaid by the silver image which is formed at the same time. In the reinforcement cut with H 2 0 2 , only the color image, but not the silver image, is then amplified in the areas in which color coupler has not yet been converted, depending on the silver formed. This differentiates between color and silver gradation. As a result, the increasing silver density is overlaid by the area of maximum color density.

Gegenstand der Erfindung ist daher ein Verfahren zur Herstellung eines fotografischen Bildes, insbesondere einer ID-Karte, unter Verwendung eines farbfotografischen Silberhalogenidmaterials auf einem reflektierenden Träger mit einem Bereich I, in dem Informationen in Form eines farbigen Bildes, und einem Bereich 11, in dem mit Infrarotlicht lesbare Daten aufgezeichnet sind, durch Verarbeitung mit den Schritten

  • (a) Belichten,
  • (b) Entwickeln mit einem Farbentwickler,
  • (c) Behandeln mit H202 oder einer Verbindung, die H202 freisetzt,
  • (d) Fixieren ohne vor oder während des Fixierens zu bleichen,
  • (e) Wässern oder Stabilisieren und
  • (f) Trocknen,
wobei die Schritte (b) und (c) zu einem Schritt zusammengefaßt werden können, dadurch gekennzeichnet, daß die Schritte (a) und (b) so durchgeführt werden, daß die Silbermaximaldichte im Bereich 11 nach Verarbeitung wenigstens 0,35, vorzugsweise wenigstens 0,5, gemessen in Reflexion bei 850 nm, und die Silbermaximaldichte im Bereich 1 nach Verarbeitung in Feldern einer Neutralfarbdichte von höchstens 1,5, höchstens 0,5 und in Feldern einer Gelb-, Purpur- oder Blaugrünfarbauszugsdichte von höchstens 1,5, höchstens 0,4, gemessen in Reflexion bei 850 nm, beträgt.The invention therefore relates to a method for producing a photographic image, in particular an ID card, using a color photographic silver halide material on a reflective support with an area I in which information is in the form of a colored image and an area 11 in which with Infrared readable data are recorded by processing with the steps
  • (a) exposure,
  • (b) developing with a color developer,
  • (c) treating with H 2 0 2 or a compound that releases H 2 0 2 ,
  • (d) fix without bleaching before or during fixation,
  • (e) watering or stabilizing and
  • (f) drying,
wherein steps (b) and (c) can be combined into one step, characterized in that steps (a) and (b) are carried out such that the maximum silver density in region 11 after processing is at least 0.35, preferably at least 0 , 5, measured in reflection at 850 nm, and the maximum silver density in area 1 after processing in fields with a neutral color density of at most 1.5, at most 0.5 and in fields with a yellow, purple or cyan color separation density of at most 1.5, at most 0.4, measured in reflection at 850 nm.

In einer bevorzugten Ausführungsform werden die Daten des IR-lesbaren Bereiches mit einer größeren Intensität einbelichtet als die Daten des farbigen Bereiches.In a preferred embodiment, the data of the IR-readable area are imaged with a greater intensity than the data of the colored area.

Die Bereiche I und 11 können räumlich voneinander abgegrenzt sein.The areas I and 11 can be spatially separated from one another.

Als fotografisches Material wird insbesondere ein Material verwendet, das auf einem Träger, insbesondere einem reflektierenden Träger wenigstens eine blauempfindliche, wenigstens einen Gelbkuppler enthaltende Silberhalogenidemulsionsschicht, wenigstens eine grünempfindliche, wenigstens einen Purpurkuppler enthaltende Silberhalogenidemulsionsschicht und wenigstens eine rotempfindliche, wenigstens einen Blaugrünkuppler enthaltende Silberhalogenidemulsionsschicht enthält, dessen Silberhalogenide wenigstens 97 Mol-% Silberchlorid und höchstens 3 Mol-% AgBr enthalten und der Silberhalogenidauftrag, angegeben als AgN03, mehr als 0,6 g/m2 beträgt, insbesondere 0,75 bis 1,5 g/m2 beträgt, wobei die Schicht oder Schichten jeder Farbempfindlichkeit einen Gesamtsilberhalogenidauftrag von wenigstens 0,12 g/m2, angegeben als AgN03, aufweist.The photographic material used is in particular a material which contains on a support, in particular a reflective support, at least one blue-sensitive silver halide emulsion layer containing at least one yellow coupler, at least one green-sensitive silver halide emulsion layer containing at least one magenta coupler and at least one red-sensitive silver halide emulsion layer containing at least one cyan coupler Silver halides contain at least 97 mol% of silver chloride and at most 3 mol% of AgBr and the silver halide coating, indicated as AgN0 3 , is more than 0.6 g / m 2 , in particular 0.75 to 1.5 g / m 2 , wherein the layer or layers of each color sensitivity has a total silver halide application of at least 0.12 g / m 2 , expressed as AgN0 3 .

Die Silberhalogenidemulsionen sind vorzugsweise negativ arbeitend.The silver halide emulsions are preferably negative working.

Außer den Silberhalogenidschichten, welche die Gelb-, Purpur- und Blaugrünkuppler enthalten, kann das fotografische Material auch eine weitere kupplerfreie Silberhalogenidschicht enthalten, die nur ein im IR-Licht lesbares Silberbild erzeugt.In addition to the silver halide layers which contain the yellow, purple and cyan couplers the photographic material also contain a further coupler-free silver halide layer that only produces a silver image that can be read in IR light.

Neben den lichtempfindlichen Schichten kann das Material nicht lichtempfindliche Schichten, sogenannte Hilfsschichten enthalten. Anzahl und Reihenfolge dieser Schichten richten sich nach den Qualitätsansprüchen, die an das Material gestellt werden. Gelb-, Purpur- und Blaugrünkuppler sind die in der Fotografie üblicherweise eingesetzten Verbindungen.In addition to the light-sensitive layers, the material can contain non-light-sensitive layers, so-called auxiliary layers. The number and sequence of these layers depend on the quality requirements placed on the material. Yellow, purple, and cyan couplers are the compounds commonly used in photography.

Das lichtempfindliche Material kann des weiteren folgende Hilfsmittel enthalten: Antischleiermittel, Härter, Weichmacher, polymere Latices, UV-Absorber, Formalinfänger, Beizen, Entwicklungsbeschleuniger, Weißtöner, Mattierungsmittel, Gleitmittel, Antistatika, Netzmittel und ähnliche Verbindungen. Das lichtempfindliche Material kann auf bekannte Art belichtet werden. Beispielsweise können für die Belichtung folgende Lichtquellen verwendet werden; Wolfram-, Halogen-, Xenon-, Quecksilberlampen, CRT-Röhren, LED und FOT.The light-sensitive material can further contain the following auxiliaries: antifoggants, hardeners, plasticizers, polymeric latices, UV absorbers, formalin scavengers, stains, development accelerators, whiteners, matting agents, lubricants, antistatic agents, wetting agents and similar compounds. The light-sensitive material can be exposed in a known manner. For example, the following light sources can be used for the exposure; Tungsten, halogen, xenon, mercury lamps, CRT tubes, LED and FOT.

Mit Farbfiltern kann die Farbe der Belichtungsquelle so eingestellt werden, daß ein farbneutrales Bild entsteht.The color of the exposure source can be adjusted with color filters so that a color-neutral image is created.

Besonders geeignet ist eine Belichtungseinrichtung, bei der die Belichtungsvorlage in Form vieler Bildpunkte ausgemessen, die Meßsignale digitalisiert, bearbeitet, gespeichert und mittels CRT wieder zur Belichtung genutzt werden.An exposure device is particularly suitable in which the exposure original is measured in the form of many pixels, the measurement signals are digitized, processed, stored and used again for exposure by means of CRT.

Das belichtete und verarbeitete Material kann als solches als ID-Karte genutzt werden. Üblicherweise wird jedoch eine Ausweiskarte auf einer oder auf beiden Seiten mit einer transparenten Folie laminiert. Eine solche Einheit ist besonders kratzfest, stabil und gegen Fälschung und Veränderung geschützt.The exposed and processed material can be used as such as an ID card. Usually, however, an ID card is laminated on one or both sides with a transparent film. Such a unit is particularly scratch-resistant, stable and protected against counterfeiting and modification.

Ein geeignetes Material für ein solches Laminat besteht aus einem Kunststoff oder Papier und einer Heißsiegelschicht. Wenigstens ein Teil der wie beschrieben hergestellten ID-Karte muß IR-Licht in einem Bereich über 750 nm oder höher, bevorzugt bei 850-950 nm absorbieren. Die Lesbarkeit kann sowohl im Durchlicht wie auch in der Reflexion erfolgen. Voraussetzung ist, daß die Empfindlichkeit des Lesegerätes auf die Eigenschaften des Materials abgestimmt ist.A suitable material for such a laminate consists of a plastic or paper and a heat seal layer. At least part of the ID card produced as described must absorb IR light in a range above 750 nm or higher, preferably at 850-950 nm. Readability can be achieved both in transmitted light and in reflection. The prerequisite is that the sensitivity of the reader is matched to the properties of the material.

Infrarotlesbare Zeichen können BAR- oder OCR-Code-Zeichen sein.Infrared readable characters can be BAR or OCR code characters.

Beispielexample

Ein farbfotografisches Aufzeichnungsmaterial wurde hergestellt, indem auf einen Schichtträger aus beidseitig mit Polyethylen beschichtetem Papier die folgenden Schichten in der angegebenen Reihenfolge aufgetragen wurden. Die Mengenangaben beziehen sich jeweils auf 1 m2. Für den Silberhalogenidauftrag werden die entsprechenden Mengen AgN03 angegeben.A color photographic recording material was produced by applying the following layers in the order given to a support made of paper coated on both sides with polyethylene. The amounts given relate in each case to 1 m 2. The corresponding amounts of AgNO 3 are given for the silver halide application.

Schichtaufbau 1Layer structure 1

  • 1. Schicht (Substratschicht):
    Figure imgb0001
    1st layer (substrate layer):
    Figure imgb0001
  • 2. Schicht (blauempfindliche Schicht): blauempfindliche Silberhalogenidemulsion (99,5 Mol.-% Chlorid, 0,5 Mol.-% Bromid, mittlerer Korndurchmesser 0,8 um) aus 0,4 g AgN03 mit
    Figure imgb0002
    2nd layer (blue-sensitive layer): blue-sensitive silver halide emulsion (99.5 mol% chloride, 0.5 mol% bromide, average grain diameter 0.8 μm) from 0.4 g AgN0 3 with
    Figure imgb0002
  • 3. Schicht (Schutzschicht):
    Figure imgb0003
    3rd layer (protective layer):
    Figure imgb0003
  • 4. Schicht (grünempfindliche Schicht) grünsensibilisierte Silberhalogenidemulsion (100 Mol.-% Chlorid, mittlerer Korndurchmesser 0,4 um) aus 0,38 g AgN03 mit
    Figure imgb0004
    4th layer (green-sensitive layer) green-sensitized silver halide emulsion (100 mol% chloride, average grain diameter 0.4 µm) from 0.38 g of AgN0 3 with
    Figure imgb0004
  • 5. Schicht (UV-Schutzschicht)
    Figure imgb0005
    5th layer (UV protective layer)
    Figure imgb0005
  • 6. Schicht (rotempfindliche Schicht) rotsensibilisierte Silberhalogenidemulsion (100 Mol.-% Chlorid, mittlerer Korndurchmesser 0,35 µm) aus 0,28 g AgN03 mit
    Figure imgb0006
    6th layer (red-sensitive layer) red-sensitized silver halide emulsion (100 mol% chloride, average grain diameter 0.35 µm) from 0.28 g AgN0 3 with
    Figure imgb0006
  • 7. Schicht (UV-Schutzschicht)
    Figure imgb0007
    7th layer (UV protective layer)
    Figure imgb0007
  • 8. Schicht (Schutzschicht)
    Figure imgb0008
    Figure imgb0009
    Figure imgb0010
    Figure imgb0011
    Figure imgb0012
    Figure imgb0013
    Figure imgb0014
         8th layer (protective layer)
    Figure imgb0008
    Figure imgb0009
    Figure imgb0010
    Figure imgb0011
    Figure imgb0012
    Figure imgb0013
    Figure imgb0014

Die Schichten wurden getrocknet, in einem Sensitometer durch einen Stufenkeil mit 120 Lx.s hinter Grau-, Blau-, Grün- und Rotfilter bildmäßig belichtet und wie folgt entwickelt:

Figure imgb0015
Figure imgb0016
Figure imgb0017
Figure imgb0018
Beispiel 2 (Vergleich)The layers were dried, exposed in a sensitometer through a step wedge with 120 Lx.s behind gray, blue, green and red filters and developed as follows:
Figure imgb0015
Figure imgb0016
Figure imgb0017
Figure imgb0018
 Example 2 (comparison)

Das Material von Beispiel 1 wurde wie folgt verarbeitet:

Figure imgb0019
Beispiel 3 (Vergleich)The material of Example 1 was processed as follows:
Figure imgb0019
 Example 3 (comparison)

Das Material von Beispiel 1 wurde wie folgt verarbeitet:

Figure imgb0020
Figure imgb0021
 The material of Example 1 was processed as follows:
Figure imgb0020
Figure imgb0021

Bei den verarbeiteten und getrockneten Proben wurden die Grauskala und der Gelb-, Purpur- und Blaugrünauszug jeweils hinter Blau-, Grün-, Rot- und Infrarotfilter (850 nm) gemessen. Die Ergebnisse werden in den Tabellen 1-3 wiedergegeben.In the processed and dried samples, the gray scale and the yellow, purple and teal extracts were measured behind blue, green, red and infrared filters (850 nm). The results are shown in Tables 1-3.

Aus den Meßergebnissen ist ersichtlich, daß der Anteil der Silberdichte, gemessen als IR-Dichte, in den für ein Portrait wichtigen Bildbereichen bis zu einer Dichte von 1,5 beim erfindungsgemäßen Beispiel 1 deutlich geringer ist als bei dem ohne Farbverstärkung hergestellten Beispiel 2.It can be seen from the measurement results that the proportion of silver density, measured as IR density, in the image areas important for a portrait up to a density of 1.5 is significantly lower in Example 1 according to the invention than in Example 2 produced without color enhancement.

Ein Vergleich der Tabellen 1 und 3 zeigt, daß die durch das Verbleiben des entwickelten Silbers verursachte Graudichte bei einem mittels Farbverstärkung entstandenen Bild sich in der Größenordnung der Nebendichte bewegt, die die jeweiligen Farbstoffe hinter den nicht komplementärfarbenen Filter gemessen ergeben. Weiter ist aus dem Vergleich der Tabellen 1 und 3 ersichtlich, daß ein auf fotochemischem Weg erzeugtes farbiges Bild, was auf traditioneller Weise gebleicht und fixiert wurde, im IR-Bereich keine auswertbare Dichte aufweist.A comparison of Tables 1 and 3 shows that the gray density caused by the remaining silver developed in an image created by means of color enhancement is of the order of magnitude of the secondary density which the respective dyes give behind the non-complementary colored filter. Furthermore, it can be seen from the comparison of Tables 1 and 3 that a color image produced by photochemical means, which has been bleached and fixed in the traditional way, has no evaluable density in the IR range.

Tabelle 1 zu Beispiel 1

Figure imgb0022
Tabelle 2 zu Beispiel 2
Figure imgb0023
Tabelle 3 zu Beispiel 3
Figure imgb0024
 Table 1 for example 1
Figure imgb0022
 Table 2 for example 2
Figure imgb0023
 Table 3 for example 3
Figure imgb0024

Claims (4)

1. Verfahren zur Herstellung eines fotografischen Bildes, insbesondere einer ID-Karte, unter Verwendung eines farbfotografischen Silberhalogenidmaterials auf einem reflektierenden Träger mit einem Bereich I, in dem Informationen in Form eines farbigen Bildes, und einem Bereich II, in dem mit Infrarotlicht lesbare Daten aufgezeichnet sind, durch Verarbeitung mit den Schritten (a) Belichten, (b) Entwickeln mit einem Farbentwickler, (c) Behandeln mit H202 oder einer Verbindung, die H202 freisetzt, (d) Fixieren ohne vor oder während des Fixierens zu bleichen, (e) Wässern oder Stabilisieren und (f) Trocknen,
wobei die Schritte (b) und (c) zu einem Schritt zusammengefaßt werden können, dadurch gekennzeichnet, daß die Schritte (a) und (b) so durchgeführt werden, daß die Silbermaximaldichte im Bereich II nach Verarbeitung wenigstens 0,35, vorzugsweise wenigstens 0,5, gemessen in Reflexion bei 850 nm, und die Silbermaximaldichte im Bereich 1 nach Verarbeitung in Feldern einer Neutralfarbdichte von höchstens 1,5, höchstens 0,5 und in Feldern einer Gelb-, Purpur- oder Blaugrünfarbauszugsdichte von höchstens 1,5, höchstens 0,4, gemessen in Reflexion bei 850 nm, beträgt.1. A method for producing a photographic image, in particular an ID card, using a silver halide color photographic material on a reflective support having an area I in which information is in the form of a colored image and an area II in which data readable by infrared light is recorded are, by processing with the steps (a) exposure, (b) developing with a color developer, (c) treating with H 2 0 2 or a compound that releases H 2 0 2 , (d) fix without bleaching before or during fixation, (e) watering or stabilizing and (f) drying,
wherein steps (b) and (c) can be combined into one step, characterized in that steps (a) and (b) are carried out in such a way that the maximum silver density in region II after processing is at least 0.35, preferably at least 0 , 5, measured in reflection at 850 nm, and the maximum silver density in area 1 after processing in fields with a neutral color density of at most 1.5, at most 0.5 and in fields with a yellow, purple or cyan color separation density of at most 1.5, at most 0.4, measured in reflection at 850 nm. 2. Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß das farbfotografische Material negativ arbeitende Silberhalogenidemulsionen enthält.2. The method according to claim 1, characterized in that the color photographic material contains negative working silver halide emulsions. 3. Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß das farbfotografische Material Silberhalogenidemulsionen mit mindestens 97 Mol-% AgCI und höchstens 3 Mol-% AgBr enthält.3. The method according to claim 1, characterized in that the color photographic material contains silver halide emulsions with at least 97 mol% AgCI and at most 3 mol% AgBr. 4. Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß das farbfotografische Material in den lichtempfindlichen Schichten einen Silberauftrag, bestimmt als eingesetztes AgN03, von 0,6 bis 1,5 g/m2 hat, wobei die Schicht oder Schichten jeder Farbempfindlichkeit einen Gesamtsilberhalogenidauftrag von wenigstens 0,12 g/m2, angegeben als AgN03 aufweist.4. The method according to claim 1, characterized in that the color photographic material in the light-sensitive layers has a silver coating, determined as AgN0 3 used , from 0.6 to 1.5 g / m 2 , the layer or layers of each color sensitivity having a total silver halide coating of at least 0.12 g / m 2 , expressed as AgN0 3 .
EP92112415A 1991-08-03 1992-07-21 Process for the production of a photographic image Expired - Lifetime EP0526795B1 (en)

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DE4125756A1 (en) 1993-02-04
DE59202313D1 (en) 1995-06-29

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