EP0938418B1 - Verfahren zur herstellung eines formkörpers mit einer farbigen markierung - Google Patents

Verfahren zur herstellung eines formkörpers mit einer farbigen markierung Download PDF

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Publication number
EP0938418B1
EP0938418B1 EP97912561A EP97912561A EP0938418B1 EP 0938418 B1 EP0938418 B1 EP 0938418B1 EP 97912561 A EP97912561 A EP 97912561A EP 97912561 A EP97912561 A EP 97912561A EP 0938418 B1 EP0938418 B1 EP 0938418B1
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EP
European Patent Office
Prior art keywords
colour
process according
laser light
generating
compounds
Prior art date
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Expired - Lifetime
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EP97912561A
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English (en)
French (fr)
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EP0938418A1 (de
Inventor
Wilhelmus Henricus Hubertus A. Van Den Elshout
Olav Marcus Aagaard
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Koninklijke DSM NV
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DSM NV
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
    • B41M5/00—Duplicating or marking methods; Sheet materials for use therein
    • B41M5/26—Thermography ; Marking by high energetic means, e.g. laser otherwise than by burning, and characterised by the material used
    • B41M5/36—Thermography ; Marking by high energetic means, e.g. laser otherwise than by burning, and characterised by the material used using a polymeric layer, which may be particulate and which is deformed or structurally changed with modification of its' properties, e.g. of its' optical hydrophobic-hydrophilic, solubility or permeability properties
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
    • B41M5/00—Duplicating or marking methods; Sheet materials for use therein
    • B41M5/26—Thermography ; Marking by high energetic means, e.g. laser otherwise than by burning, and characterised by the material used
    • B41M5/34—Multicolour thermography
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
    • B41M5/00—Duplicating or marking methods; Sheet materials for use therein
    • B41M5/26—Thermography ; Marking by high energetic means, e.g. laser otherwise than by burning, and characterised by the material used
    • B41M5/267—Marking of plastic artifacts, e.g. with laser
    • 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
    • G03C7/02—Direct bleach-out processes; Materials therefor; Preparing or processing such materials
    • 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
    • G03C7/46—Subtractive processes not covered by the group G03C7/26; Materials therefor; Preparing or processing such materials

Definitions

  • the invention relates to a process for the manufacture of an object with a coloured marking by irradiating the surface of the object with laser light in the shape of the marking.
  • a problem presented by the known process is that the colours that are obtained are not freely chosen, but are obtained randomly. Further, the marking can only be obtained in a limited number of colours. Moreover, it is not possible to obtain a marking on a colourless substrate.
  • the aim of the invention is to provide a process which does not present the above-mentioned drawbacks.
  • the object consists of a plastic composition comprising at least three prechrome compounds which only acquire their colour-generating capacity after a colour-generating treatment and which under the influence of laser light lose their colour-generating capacity, the surface of the object being subjected to the colour-generating treatment at least at the place where the marking is applied, after which the surface of the object is irradiated with laser light in the shape of the marking, the prechrome compounds having been chosen such that and being present in such a concentration that at each wavelength between 400 and 700 nanometres at least part of the amount of incident light is absorbed.
  • the substrate on which the finally resulting marking is formed retains its natural colour.
  • the substrate becomes coloured. That is undesirable.
  • the process according to the invention permits application of markings on a substrate which can have any desired colour. It is also possible for the substrate to have no colour at all.
  • the known copy sheets comprise a support layer and a coating thereon.
  • the coating comprises colourforming means that is rendered light sensitive by a sensitising material.
  • the sensitising material becomes effective subsequent to the application of heat to the copy sheet at a predetermined temperature.
  • the colourforming means may be rendered desensitised by a desensitising agent also included in the coating.
  • the prechrome compounds which only acquire their colour-generating capacity after a colour-generating treatment are known to the person skilled in the art. They are compounds which do not acquire a chromatic colour until they have been subjected to a colour-generating treatment, for instance irradiation with UV laser light. Particularly suitable prechrome compounds are the photochrome compounds. These compounds can change colour through a conformation modification and/or a chemical reaction. The conformation modification and/or the chemical reaction is/are achieved through a colour-generating treatment by irradiation with UV light.
  • the colour-generating treatment preferably consists of irradiation of the object with UV laser light. This offers the additional advantage that it is possible to irradiate the object in only the shape of the marking.
  • the process according to the invention is characterized in that the colour-generating treatment consists of irradiation with UV laser light, with the number of irradiated photons per cm 2 per second being at least 1019.
  • UV laser light is understood laser light with a wavelength of less than 400 nm.
  • Suitable photochrome compounds are commercially available, for instance from HCH James Robinson Ltd. in the UK.
  • Other suitable prechrome compounds are for instance colouring agents which are encapsulated in microcapsules. These microcapsules are mixed in with the plastic composition and preferably remain intact when the plastic composition is processed to an object, for instance by injection moulding. Such microcapsules acquire their colour-generating capacity by heat being supplied.
  • the process according to the invention is preferably characterized in that the prechrome compounds are leuco colorants encapsulated in microcapsules and the colour-generating treatment consists of supply of heat.
  • Heat is preferably supplied through irradiation with IR laser light.
  • IR laser light is understood laser light with a wavelength of more than 700 nm.
  • Leuco colorants are known to the person skilled in the art. They are colorants which as such are colourless, but acquire colour when they are contacted with an electron acceptor by reacting them with a proton. Colorant microcapsules which are suitable for the process according to the invention are described for instance in EP-A-542 133.
  • the process according to the invention is preferably used on a substrate having a light colour, for instance a white or light-grey colour.
  • the process according to the invention is preferably characterized in that one or more colours are chosen for the marking, then the wavelength of the laser light is set to a value which depends on the colour chosen and subsequently the surface of the object is irradiated with the laser light.
  • the surface of the object after it has been subjected to the colour-generating treatment, can for instance be irradiated with a series of different wavelengths, in order in this way to determine a relation between the wavelength of the laser light and the resulting colour of the marking. Then, on the basis of the relationship thus established, the wavelength of the laser light can be set to a value that depends on the selected colour.
  • the plastic composition may in general contain any thermoplastic or thermosetting plastic or any elastomer. Highly suitable are the plastics which the plastic composition according to WO94/12352 may comprise.
  • the prechrome compounds preferably are each present in such a concentration that, after the colour-generating treatment, at each wavelength between 400 and 700 nm, at least 20%, more preferably at least 50%, even more preferably at least 80% of the quantity of incident light, expressed in lux, is absorbed.
  • a person skilled in the art can simply select the prechrome compounds and the concentration and then, after the colour-generating treatment, measure the absorbed light (the absorption spectrum) at each wavelength between 400 and 700 nm by means of one of the known measurement methods and subsequently adapt the prechrome compound and its concentration until the desired absorption spectrum has been obtained.
  • the process according to the invention can be carried out with the help of one or more laser devices which emit laser light of a wavelength that corresponds to the wavelength value selected on the basis of the desired colour of the marking.
  • the process according to the invention is preferably carried out with a laser device with adjustable wavelength. This allows easy setting of the required wavelength, depending on the selected colour of the marking. This also makes it possible to obtain a multicolour marking by means of one device.
  • the surface of the plastic composition is preferably irradiated with laser light at at least three different wavelengths, more preferably with multiple wavelengths, which depend on the selected colours of the marking. In this way markings are obtained which contain multiple colours and can even come close to or, if a laser beam of a very small diameter is used, actually surpass the quality of a colour photo. Very good results are obtained if the diameter of the laser beam is equal to or smaller than the grain diameter of a colour photo. A typical value for such a grain diameter is 0.5-3 micrometres.
  • the plastic composition according to the invention preferably only contains prechrome compounds which after the colour-generating treatment under the influence of laser light lose their colour-generating capacity and which after the colour-generating treatment have one single absorption band.
  • the wavelength of the colour in which the marking is obtained corresponds to the wavelength of the laser light with which the surface of the plastic composition is irradiated. This makes it very easy to obtain the selected colour, because the selected colour is virtually the same as the colour of the laser light.
  • the selected colour of the marking is even more similar or even fully similar to the colour of the laser light if after the colour-generating treatment between 400 and 700 nm at each wavelength at least approximately the same quantity of light is absorbed.
  • the difference between the quantities of light absorbed at the different wavelengths is not more than 20%, more preferably not more than 10%, still more preferably not more than 5%.
  • the surface of the object prior to application of the marking has a white or light-grey tint at those places where no colour-generating treatment has taken place and a neutral-grey or black tint at those places where the colour-generating treatment has taken place.
  • the plastic composition contains a first prechrome compound which after the colour-generating treatment reflects light whose principal colour is yellow, a second prechrome compound which after the colour-generating treatment reflects light whose principal colour is magenta and a third prechrome compound which after the colour-generating treatment reflects light whose principal colour is cyan.
  • the prechrome compounds after the colour-generating treatment have comparable laser light bleaching efficiency values.
  • 'bleaching efficiency' is understood the time during which a prechrome compound, after the colour-generating treatment, exposed to irradiation with laser light of a certain intensity, loses 80% of its light absorption capacity, i.e. the quotient of (1 - quantity of reflected light) and the quantity of incident light, both expressed in lux.
  • the difference in bleaching efficiency between the compounds is not more than 20%, more preferably not more than 10%. In this way it is achieved that if a multicolour marking is applied by means of the process, for each colour only the wavelength of the laser device or laser devices has to be set, while for instance the duration of the treatment and the laser light intensity can simply be the same for each colour.
  • the prechrome compounds do not or hardly acquire their colour-generating capacity in normal daylight. That is why the prechrome compounds preferably have a colour stability of at least 3, more preferably at least 5 on the Wool scale (according to DIN 54003). Also after the colour-generating treatment the resulting colour-generating components preferably have this colour stability.
  • Another preferred process is characterized in that at least at the place where the marking is applied the prechrome compounds after the colour-generating treatment each have a maximum in their light absorption spectrum at a different wavelength, with the marking being applied in the form of matrix dots by irradiating the object at place of a matrix dot with laser light of such a wavelength and intensity and during such a length of time that at least one of the prechrome compounds that have acquired their colour-generating capacity after the colour-generating treatment has partially or wholly lost its light absorption capacity.
  • the marking can have different colours and markings that each have a different colour can be obtained on the surface of the same plastic composition. It is even possible to obtain the marking in many different colours on the surface of the same plastic composition.
  • This preferred process according to the invention permits application of matrix dots on the surface in a simple manner.
  • the light absorption capacity of a previously selected colour-generating component will be reduced after the colour-generating treatment and at the irradiated spots the surface will reflect the colour that is not absorbed by the component in question.
  • the brightness of the reflected colour can be enhanced.
  • colours are formed by applying matrix dots of at least three different colours on the surface. This is achieved by irradiating the surface with laser light of at least three different wavelengths, at each of which at least one of the light-absorbing components wholly or partially loses its light absorption capacity. In this way it is possible to obtain a large number of other colours from at least three colours by mixing the three colours in the required proportions.
  • Mixed colours can be obtained in several ways.
  • mixed colours can be obtained by for instance varying the brightness of the colours of the different matrix dots relative to each other, for instance by irradiating matrix points of a certain colour longer than other matrix points.
  • Another possibility is to vary the ratio(s) between the total surface areas of the different colours, for instance by making one matrix dot larger than the other or by making more matrix dots of the one colour than of the other colours.
  • the matrix dots can be round or square, but also for instance triangular or bar-shaped, for instance in order to be able to fill up the surface better or to enhance the total reflection of the surface.
  • a colour can be characterized on the basis of the ASTM E 308 standard, by first measuring the tristimulus values of the colour-and deriving from these, as described in said standard, the chromaticity coordinates, which determine the place of the colour in the CIE D65 (10° observer) colour diagram.
  • the colour diagram thus is a graphic representation of all colours in the visible range.
  • the partitive method of blending yields colours that lie in the colour diagram in the surface between the points that represent the minimally three colours of the matrix points in the colour diagram. These points are the corner points of the surface.
  • a process according to the invention whereby even more different colours can be obtained is realized if matrix dots are applied wholly or partly overlapping.
  • This method of colour blending is called 'subtractive blending'.
  • the colour of the surface is preferably generated through subtractive mixing of at least three different coloured matrix dots.
  • the colour range that can be derived from subtractive mixtures is larger than in the case of partitive mixing, because it is also possible to form colours which in the colour diagram lie outside the surface between the points which represent the minimally three different colours of the matrix dots in the colour diagram.
  • the plastic composition can in principle comprise any thermosetting or thermoplastic plastic or elastomer. Very suitable are the plastics that can be present in the plastic composition according to WO94/12352.
  • the prechrome compounds are preferably chosen such that after the colour-generating treatment the surface area between the points representing the minimally three different colours of the matrix dots in the colour diagram is at least equal to 10% of the surface area of the diagram.
  • Said surface area is preferably equal to at least 30% of the diagram, more preferably at least 75% of the diagram.
  • the wavelength of the laser light with which the surface should be irradiated in order to cause a selected colour-generating component to lose its light absorption capacity after the colour-generating treatment can simply be determined empirically.
  • the selected laser light wavelengths for irradiation of the surface preferably are the wavelengths at which the maximum occurs in the absorption spectrum of the colour-generating component which after the colour-generating treatment should lose its light absorption capacity. In this way one obtains a very good selectivity and a good brightness of the colours are ensured.
  • the process according to the invention is preferably carried out with the help of one or more masks. These masks transmit light at the places where the surface has to be irradiated and do not transmit light where the surface should not be irradiated.
  • masks transmit light at the places where the surface has to be irradiated and do not transmit light where the surface should not be irradiated.
  • the process according to the invention is preferably carried out with the help of a variable mask.
  • PDLCD Polymer Dispersed Liquid Crystal Display
  • Advantages of these masks are that a computer generates the required mask on the LCD or PDLCD screen and the surface can then be irradiated through the mask. Then a second mask can be produced on the screen on the same position. The risk of positioning problems is thus avoided. Another advantage is that it takes very little time to switch from one mask to another.
  • the laser device is capable of emitting light of the different wavelengths corresponding to the maxima of the absorption spectrums of the different prechrome compounds after the colour-generating treatment.
  • the full range of possible colours can then be produced using a single laser device.
  • a laser device with at least four laser beams of different laser light wavelengths combined in one fibre, with at least one beam having a wavelength of less than 400 nm (UV laser light) and with the possibility of varying the intensity of each beam independently of the other beams.
  • UV laser light UV light
  • the invention also relates to an information carrier which has at least one surface consisting of the above-described plastic composition, that surface being at least 50% covered with one or more markings.
  • an information carrier can be provided with a marking by means of the process according to the invention.
  • the marking can contain any desired colour.
  • the marking can even have the shape of a true-to-nature image of for instance objects, animals or persons.
  • the surface of the information carrier can also be at least 50% covered with text.
  • Examples of such information carriers are posters, signboards, company nameplates, advertising boards, etc.
  • the information carrier preferably comprises a supporting layer under the layer made of the plastic composition.
  • the layer made of the plastic composition can be of a minor thickness and that, depending on the type of supporting layer chosen, various kinds of information carrier for a wide variety of purposes are obtained.
  • the supporting layer may be of paper and the information carrier may have the form of a colour photo or a photocopy.
  • the supporting layer may also consist of a plastic or a metal.
  • the plastic of the plastic composition is of a type that adheres well to the supporting layer.
  • the invention also relates to an object that can be made into the above-described information carrier.
  • a dry blend was made from 1897 parts by weight of Ronfalin® SFA-34, an acrylonitrile-butadienestyrene copolymer (ABS) from DSM (Netherlands), 100 parts by weight of Lithophone Silbers® 60% L, a zinc sulphide pigment supplied by Sachtleben (Germany), as well as 0.64 part by weight of Reversacol® Plum Red, 0.32 part by weight of Reversacol® Sea Green and 0.16 part by weight of Reversacol® Corn Yellow, photochrome pigments supplied by HCH James Robinson Ltd. (UK).
  • a dry blend was made from 1897 parts by weight of Ronfalin® SFA-34, an acrylonitrile-butadienestyrene copolymer (ABS) from DSM (Netherlands), 100 parts by weight of Lithophone Silbers® 60% L, a zinc sulphide pigment supplied by Sachtleben (Germany), as well as 0.64 part by weight of Reversacol® Plum Red, 0.32 part by
  • the dry blend was melted, kneaded at 260°C and processed to granulate using a ZSK® 30 twin-screw kneader from Pfleiderer and Werner (Germany). With the help of an injection moulding machine, type Arburg Allrounder® 320-90-750 the granulate was injection-moulded to plates measuring 3.2 * 120 * 120 mm at a temperature of 240°C. The plates had a light-grey tint.
  • the plates thus obtained were irradiated with UV laser light (3000 Watts for 5 seconds).
  • the colour of the plates changed from light grey to dark grey during this irradiation. This change of colour was irreversible.
  • the laser set-up comprised a seeding laser of the type EEO® -355 which was used as a pump laser for an Nd:YAG laser of the type GCR® -230/50.
  • the laser set-up further comprised an optical parameter oscillator (OPO) of the type MOPO® 710, which received the signal from the last-mentioned laser via a frequency doubling optic (FDO) device.
  • OPO optical parameter oscillator
  • FDO frequency doubling optic

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  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • General Physics & Mathematics (AREA)
  • Thermal Transfer Or Thermal Recording In General (AREA)
  • Treatments Of Macromolecular Shaped Articles (AREA)

Claims (22)

  1. Verfahren zur Herstellung eines Gegenstands mit einer gefärbten bzw. farbigen Markierung durch Bestrahlen der Oberfläche des Gegenstands mit Laserlicht in der Form der Markierung, worin wenigstens an der Stelle, wo die Markierung aufgebracht wird, der Gegenstand aus einer Kunststoffzusammensetzung besteht, welche wenigstens drei Vorfarbverbindungen umfaßt, welche ihre farberzeugende Eigenschaft nur nach einer Farberzeugungsbehandlung annehmen und welche unter dem Einfluß von Laserlicht fähig sind, ihre Farberzeugungseigenschaft wieder zu verlieren, wobei die Oberfläche des Gegenstands der Farberzeugungsbehandlung wenigstens an der Stelle unterworfen wird, wo die Markierung aufgebracht wird, wonach die Oberfläche des Gegenstands mit Laserlicht in der Form der Markierung bestrahlt wird, wobei die Vorfarbverbindungen so gewählt werden und in einer derartigen Konzentration vorhanden sind, daß mit jeder Wellenlänge zwischen 400 und 700 nm weingstens ein Teil der Menge des einfallenden Lichts absorbiert wird.
  2. Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß die Vorfarbverbindungen Fotochromverbindungen sind und die Farberzeugungsbehandlung aus einer Bestrahlung mit UV-Licht besteht.
  3. Verfahren nach Anspruch 2, dadurch gekennzeichnet, daß die Farberzeugungsbehandlung aus einer Bestrahlung mit UV-Laserlicht besteht, wobei die Anzahl von bestrahlten Photonen pro cm2 pro Sekunde wenigstens 1019 beträgt.
  4. Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß die Vorfarbverbindungen Leukofarbstoffe sind, welche in Mikrokapseln eingeschlossen sind, und daß die Farberzeugungsbehandlung in einer Zufuhr von Wärme besteht.
  5. Verfahren nach Anspruch 4, dadurch gekennzeichnet, daß die Wärme durch eine Bestrahlung mit IR-Laserlicht zugeführt wird.
  6. Verfahren nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, daß eine oder mehrere Farben für die Markierung gewählt werden, daß dann die Wellenlänge des Laserlichts auf einen Wert eingestellt wird, welcher der gewählten Farbe entspricht, und daß nachfolgend die Oberfläche des Gegenstands mit dem Laserlicht bestrahlt wird.
  7. Verfahren nach einem der Ansprüche 1 bis 6, dadurch gekennzeichnet, daß das Verfahren mit einer Laservorrichtung mit einstellbarer Wellenlänge durchgeführt wird.
  8. Verfahren nach einem der Ansprüche 1 bis 7, dadurch gekennzeichnet, daß die Oberfläche des Gegenstands mit Laserlicht mit wenigstens drei unterschiedlichen Wellenlängen bestrahlt wird.
  9. Verfahren nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, daß zwischen 400 und 700 nm die Differenz zwischen den bei unterschiedlichen Wellenlängen absorbierten Lichtmengen nicht mehr als 5 % beträgt.
  10. Verfahren nach einem der Ansprüche 1 bis 9, dadurch gekennzeichnet, daß die Kunststoffzusammensetzung eine erste farberzeugende Komponente, welche nach der Farberzeugungsbehandlung Licht reflektiert, dessen wesentliche Farbe gelb ist, eine zweite farberzeugende Komponente, welche nach der Farberzeugungsbehandlung Licht reflektiert, dessen wesentliche Farbe Magenta ist, und eine dritte farberzeugende Komponente beinhaltet, welche nach der Farberzeugungsbehandlung Licht reflektiert, dessen wesentliche Farbe Cyan ist.
  11. Verfahren nach einem der Ansprüche 1 bis 10, dadurch gekennzeichnet, daß die Differenz zwischen den Bleichfähigkeitswerten der Vorfarbverbindungen nach der Farberzeugungsbehandlung nicht mehr als 20 % beträgt.
  12. Verfahren nach einem der Ansprüche 1 bis 11, dadurch gekennzeichnet, daß die Vorfarbverbindungen nach der Farberzeugungsbehandlung jeweils ein Maximum in ihrem Lichtabsorptionsspektrum bei einer unterschiedlichen Wellenlänge aufweisen, wobei die Markierung aus Matrixpunkten besteht, welche durch ein Bestrahlen des Gegenstands an der Stelle eines Matrixpunkts mit Laserlicht einer derartigen Wellenlänge und Intensität und während einer derartigen Zeitdauer hergestellt werden, daß wenigstens eine der Vorfarbverbindungen nach der Farberzeugungsbehandlung teilweise oder vollständig ihre Lichtabsorptionskapazität verloren hat.
  13. Verfahren nach Anspruch 12, dadurch gekennzeichnet, daß die Farbe der Oberfläche durch ein subtraktives Mischen der Farben der Matrixpunkte gebildet wird.
  14. Verfahren nach Anspruch 12, dadurch gekennzeichnet, daß die Farbe der Oberfläche durch ein teilendes Mischen der Farben der Matrixpunkte gebildet wird.
  15. Verfahren nach einem der Ansprüche 12 bis 14, dadurch gekennzeichnet, daß die Vorfarbverbindungen so gewählt wurden, daß der Oberflächenbereich zwischen den Punkten, welche die wenigstens drei unterschiedlichen Farben der Matrixpunkte in dem Farbdiagramm repräsentieren, wenigstens gleich 10 % des Oberflächenbereichs des Diagramms ist.
  16. Verfahren nach einem der Ansprüche 12 bis 15, dadurch gekennzeichnet, daß die gewählten Laserlicht-Wellenlängen zum Bestrahlen der Oberfläche die Wellenlängen sind, bei welchen die Maxima in den Absorptionsspektren der unterschiedlichen Vorfarbverbindungen nach der Farberzeugungsbehandlung auftreten.
  17. Verfahren nach einem der Ansprüche 12 bis 16, dadurch gekennzeichnet, daß das Verfahren gemäß der Erfindung mit Hilfe von einer oder mehreren Masken durchgeführt wird.
  18. Verfahren nach einem der Ansprüche 12 bis 17, dadurch gekennzeichnet, daß das Verfahren gemäß der Erfindung mit Hilfe einer variablen Maske durchgeführt wird.
  19. Verfahren nach einem der Ansprüche 12 bis 18, dadurch gekennzeichnet, daß die Oberfläche mit Hilfe einer Laservorrichtung bestrahlt wird, welche die Oberfläche des Gegenstands mit Hilfe einer Sequenz von wenigstens drei Masken übereinander bestrahlt, wobei jede der Masken mit Laserlicht mit unterschiedlichen Wellenlängen derart bestrahlt wird, daß die Bilder der Masken übereinander auf die Oberfläche des Gegenstands projiziert werden.
  20. Informationsträger, welcher wenigstens eine Oberfläche aufweist, welche aus der Kunststoffzusammensetzung besteht, wie sie in Anspruch 1 bis 19 beschrieben ist, wobei diese Oberfläche zu wenigstens 50 % mit einer oder mehreren Markierungen bedeckt ist.
  21. Kunststoffzusammensetzung, umfassend wenigstens drei Vorfarbverbindugen, welche ihre Farberzeugungseigenschaften nach einer Farberzeugungsbehandlung annehmen und welche unter dem Einfluß von Laserlicht ihre Farberzeugungseigenschaft wieder verlieren können.
  22. Gegenstand, wobei wenigstens ein Teil seiner Oberfläche eine Kunststoffzusammensetzung gemäß Anspruch 21 umfaßt.
EP97912561A 1996-11-07 1997-11-05 Verfahren zur herstellung eines formkörpers mit einer farbigen markierung Expired - Lifetime EP0938418B1 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
BE9600945A BE1010743A3 (nl) 1996-11-07 1996-11-07 Werkwijze voor de vervaardiging van een voorwerp met gekleurde markering.
BE9600945 1996-11-07
PCT/NL1997/000608 WO1998019868A1 (en) 1996-11-07 1997-11-05 Process for the manufacture of an object with a coloured marking

Publications (2)

Publication Number Publication Date
EP0938418A1 EP0938418A1 (de) 1999-09-01
EP0938418B1 true EP0938418B1 (de) 2001-07-04

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EP97912561A Expired - Lifetime EP0938418B1 (de) 1996-11-07 1997-11-05 Verfahren zur herstellung eines formkörpers mit einer farbigen markierung

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EP (1) EP0938418B1 (de)
JP (1) JP2001503877A (de)
KR (1) KR20000053133A (de)
CN (1) CN1091696C (de)
AU (1) AU4969297A (de)
BE (1) BE1010743A3 (de)
BR (1) BR9713495A (de)
DE (1) DE69705534T2 (de)
ES (1) ES2160332T3 (de)
WO (1) WO1998019868A1 (de)

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ATE312723T1 (de) * 1999-08-30 2005-12-15 Orga Kartensysteme Gmbh Kartenförmiger datenträger und verfahren zu seiner herstellung
NL1015710C2 (nl) * 2000-07-14 2002-01-15 Dsm Nv Markeerbare polymeersamenstelling.
DE50108643D1 (de) 2000-11-04 2006-03-30 Kurz Leonhard Fa Kunststoffkörper als Folie, z.B. Transferfolie oder Laminierfolie ausgebildet oder mit einer solchen Folie versehen sowie Verfahren zur Herstellung eines Mehrfarbenbildes auf oder in einem solchen Kunststoffkörper
DE10054803A1 (de) * 2000-11-04 2002-05-29 Kurz Leonhard Fa Kunststoffkörper, insbesondere massiver Kunststoffkörper oder Folie, z. B. Transferfolie oder Laminierfolie sowie Verfahren zur Herstellung eines Mehrfarbenbildes auf oder in einem solchen Kunststoffkörper
ATE381445T1 (de) 2001-11-02 2008-01-15 Kurz Leonhard Fa Mehrschichtenkörper mit einer ersten lasersensitiven schicht und einer zweiten lasersensitiven schicht sowie verfahren zur erzeugung eines mehrschichtenbildes in einem solchen mehrschichtenkörper
AU2002315675A1 (en) * 2002-05-08 2003-11-11 Leonhard Kurz Gmbh And Co. Kg Multilayer body with a laser-sensitive layer
US8257906B2 (en) 2006-03-29 2012-09-04 Hewlett-Packard Development Company, L.P. Multi-layered radiation imageable coating
CN101595000B (zh) * 2006-12-07 2011-04-06 爱克发-格法特公司 制造信息载体的方法
EA201170424A1 (ru) * 2008-09-10 2011-10-31 Дейталейз Лтд. Многоцветные коды
EP2324477B1 (de) * 2008-09-10 2012-07-25 DataLase Ltd Datenspeichermedium

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FR748178A (fr) * 1932-01-04 1933-06-29 Procédé pour la production d'épreuves photographiques en couleurs
US3892569A (en) * 1972-12-04 1975-07-01 Gen Film Dev Corp Photosensitive sheets comprising organic dyes and sensitizers
KR910000826B1 (ko) * 1986-11-14 1991-02-09 미쓰비시덴기 가부시기가이샤 레이저 마킹 방법
JPH087398B2 (ja) * 1988-09-29 1996-01-29 富士写真フイルム株式会社 多色記録材料
JPH03263040A (ja) * 1990-03-13 1991-11-22 Mitsubishi Paper Mills Ltd 画像形成方法
GB2249843A (en) * 1990-10-25 1992-05-20 Robert Peter Sunman Image production
DE4137619A1 (de) * 1991-11-15 1993-05-19 Basf Ag Mikrokapseln mit feststoff-kern
NL9202096A (nl) * 1992-12-02 1993-04-01 Dsm Nv Polymeersamenstelling, bevattende een polymeer en tenminste een stralingsgevoelig bestanddeel.
DE4402363C2 (de) * 1994-01-27 1995-08-17 Kunststoff Maschinen Handelsge Verfahren zur chromatotropischen LASER-Beschriftung von Kunststoffen
NL1000331C2 (nl) * 1995-05-10 1996-11-12 Dsm Nv Werkwijze voor de vervaardiging van een gekleurde markering.

Also Published As

Publication number Publication date
BE1010743A3 (nl) 1999-01-05
WO1998019868A1 (en) 1998-05-14
EP0938418A1 (de) 1999-09-01
CN1091696C (zh) 2002-10-02
DE69705534D1 (de) 2001-08-09
JP2001503877A (ja) 2001-03-21
KR20000053133A (ko) 2000-08-25
ES2160332T3 (es) 2001-11-01
CN1242743A (zh) 2000-01-26
AU4969297A (en) 1998-05-29
BR9713495A (pt) 2001-07-03
DE69705534T2 (de) 2002-05-16

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