WO1996017729A1 - Feuille d'ecriture d'une liasse carbonee - Google Patents

Feuille d'ecriture d'une liasse carbonee Download PDF

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Publication number
WO1996017729A1
WO1996017729A1 PCT/EP1995/004685 EP9504685W WO9617729A1 WO 1996017729 A1 WO1996017729 A1 WO 1996017729A1 EP 9504685 W EP9504685 W EP 9504685W WO 9617729 A1 WO9617729 A1 WO 9617729A1
Authority
WO
WIPO (PCT)
Prior art keywords
color developer
recording
sheet
color
sheet according
Prior art date
Application number
PCT/EP1995/004685
Other languages
German (de)
English (en)
Inventor
Günter GABEL
Wolfram Friesen
Reiner Müller
Michael Hirt
Original Assignee
Stora Publication Paper 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 Stora Publication Paper Ag filed Critical Stora Publication Paper Ag
Priority to SI9530225T priority Critical patent/SI0796173T1/xx
Priority to CZ971739A priority patent/CZ173997A3/cs
Priority to DE59504843T priority patent/DE59504843D1/de
Priority to AU41766/96A priority patent/AU690783B2/en
Priority to PL95320633A priority patent/PL320633A1/xx
Priority to EP95940255A priority patent/EP0796173B1/fr
Publication of WO1996017729A1 publication Critical patent/WO1996017729A1/fr

Links

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
    • B41M5/124—Duplicating or marking methods; Sheet materials for use therein using pressure to make a masked colour visible, e.g. to make a coloured support visible, to create an opaque or transparent pattern, or to form colour by uniting colour-forming components
    • B41M5/132—Chemical colour-forming components; Additives or binders therefor
    • B41M5/155—Colour-developing components, e.g. acidic compounds; Additives or binders therefor; Layers containing such colour-developing components, additives or binders
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
    • B41M3/00—Printing processes to produce particular kinds of printed work, e.g. patterns
    • B41M3/14—Security printing
    • B41M3/142—Security printing using chemical colour-formers or chemical reactions, e.g. leuco-dye/acid, photochromes

Definitions

  • the invention relates to a recording sheet of a carbon copy set with a layer applied to one of its sides, in which there is a color developer which is used to react with colorless dye precursors.
  • Recording sheets of the type specified at the outset are known and are used in particular in pressure-sensitive copy sets.
  • a recording sheet provided with a color developer layer on its top forms the end sheet in a pressure-sensitive copy set.
  • Such a bow is referred to below as a CF bow.
  • the color developer layer of the CF sheet is in contact with the underside of a further sheet which has a layer on the rear side which contains the color formers which are intended to react with the color developer of the CF sheet.
  • Such bows are called CB bows.
  • CB bows To avoid early contact with the color developers it is established that the dye precursors are dissolved in a suitable solvent and sealed in microcapsules.
  • CFB sheets can be used as interleaves in pressure-sensitive carbon copy sets, each of which has a CF coating on the top and a CB coating on the back.
  • Transfer sheets in which the dye precursors are not in encapsulated form are also known from the prior art.
  • DE-A-22 19 527 the use of unencapsulated dye precursors is known, with crystal violet lactone on a neutral pigment, e.g. As calcium carbonate, is adsorbed and is applied to one side of a sheet, the other side of which has a microcapsule coating with a color former solution contained therein.
  • a neutral pigment e.g. As calcium carbonate
  • the common arrangement of color former and color developer or color acceptor on one side of a sheet is not disclosed.
  • DE-A-31 02 472 discloses a pressure-sensitive recording sheet in which a color precursor together with neutral clay, calcium carbonate or titanium dioxide is contained in the form of an encapsulated form in the layer of the recording material.
  • a typeface is created by printing a layer on the underside of another sheet, which contains a color acceptor in addition to wax, is transferred to the base sheet containing the color precursor.
  • Sheet-like recording materials in which the color formers are arranged together with neutral pigment in an encapsulated form in a layer are known from DE-A-29 52 445.
  • DE-A-41 03 966 describes a solid color former which is enclosed in a first shell made of water-soluble, non-ionic polymer and a second shell made of a crosslinked polymer.
  • aqueous dispersion of the color former preparation is mixed with a likewise aqueous developer dispersion and applied to a paper.
  • An unencapsulated color former which together with a mixture of different ester compounds, waxes and plastics as well as fillers such.
  • B. CaC0 3 , BASO4 or Ti ⁇ 2 is provided to form a CB layer, is from EP-A- 0 059 679 known.
  • a security document is known e.g. B. known for use as a credit card or ticket.
  • This document also describes the problem that a ticket purchased for a nearby travel destination is forged by specifying a travel destination further away.
  • the substrate surface is provided with a composition of the type normally used in the production of pressure-sensitive recording papers.
  • the pressure-sensitive recording surface formed lies in the same plane (coplanar) as the rest of the surface of the substrate and is covered with a transparent protective layer. If the protective layer is removed with the aim of falsifying data, there is easily detectable damage to the substrate and, in addition, a step or shoulder at the point where the original transparent protective layer is replaced.
  • EP-A-0 237 226 discloses a pressure-sensitive recording material in which a dye precursor in solid form on a substrate and a color developer for the dye precursor and microcapsules containing a solvent on a further substrate which is intended for contact with the first substrate for the dye precursor are arranged. None of the documents discussed above disclose the presence of a solid and unencapsulated dye precursor together with a reactive color developer in a single layer of pressure sensitive recording material.
  • Copy sets are also known from the prior art which are composed of the known pressure-sensitive CB sheets, CF sheets and one or more CFB sheets.
  • pressure-sensitive carbon copy sets are used as tickets or tickets in public transport, there is the disadvantage of insufficient counterfeit security. It has been shown that the typefaces produced on the recording layer can be removed by treatment with suitable solvents and can be replaced by false information.
  • the present invention has for its object to provide a recording sheet for use in a pressure-sensitive copy set, in which it is easily possible to recognize the removal of data by using organic solvents.
  • the invention provides a recording sheet Copy set, which has a recording layer applied to one of its sides, in which there is a color developer which is used to react with colorless dye precursors, the combination of the following features:
  • the recording layer contains one or more oil-soluble dye precursors in solid form
  • the dye precursor (s) are freely accessible and are not isolated from the color developer;
  • the proportion of dye precursors, based on color developer, is 0.1 to 1 wt.%.
  • recording layer used in patent claims and description is to be understood not only as a recording sheet provided with a CF layer, but also as a so-called SC (soap-containing) sheet, in which color developers and encapsulated dye precursor solutions are present in one layer or in several superimposed layers on one side of a sheet.
  • organic color developer generally encompasses the known acidic resins such as phenolic resins of the novolac type, salicylic acid derivatives and their metal salt compounds.
  • customary color formers in particular fluoranes, are suitable for the purposes of the present invention.
  • ⁇ soluble is to be understood that the dye precursors are soluble in the organic solvents known as core solvents or capsule oil, but also in solvents such as acetone, ethanol and toluene.
  • the dye precursor contained in the recording layer is at least partially dissolved and, in cooperation with the color developer, depending on the type of dye precursor used, a z. B. blue or red coloring, which clearly indicates the removal of the original data when checked.
  • the relatively small amount of dye precursor which is added in relation to the color developer present at the same time, quasi in the "subcritical range", ensures that there is no premature discoloration of the recording layer.
  • a print caused, for example, by a pen does not yet lead to the creation of a typeface on the recording layer of the recording sheet according to the invention, because between that in the solid Form present dye precursor and the color developer no reaction takes place.
  • the proportion of the dye precursor, based on the color developer present in the recording layer is below the minimum amount of 0.1% by weight provided by the invention, treatment with solvent does not lead to a sufficiently deep coloring, so that the detection of a forgery is made more difficult.
  • the amount of dye precursor used, based on acidic clay as color developer is as is usually the case for producing a clearly visible typeface is used, approx. 5% by weight, while in the case of organic acceptors approx. 25 to 30% by weight are required.
  • the color developer layer is in a basis weight of 4 to 8 g / m 2 , 45 to 65% by weight of color developer being contained in the recording layer.
  • organic Color developers prefer an applied basis weight of 4 to 6 g / m 2 .
  • the recording sheets according to the invention and their use in carbonless records are not restricted to specific uses for the carbonless records.
  • the recording sheets according to the invention can be used as an insert sheet in printed duplicate sets which are used as waybills.
  • the recording sheets according to the invention are very particularly preferably used as an intermediate sheet in sets of flight or ticket forms, in particular if these are filled in by hand. Because these tickets are often only issued during the journey and careful handling of the form sets cannot always be guaranteed, a CB and CF sheet, preferably combined with a CFB sheet, are preferably used for such form sets , since it has been shown that the use of SC-bows can lead to unwanted premature discoloration for this purpose.
  • a CF sheet according to the invention is produced by one on one side of a wood-free coating base paper with a basis weight of 50 g / m 2, which is conventional per se for this purpose
  • Recording layer is applied with a mass per unit area of 7 g / m 2 , in which an acid clay is present as the color developer and, based on the acid clay, 0.8% by weight of crystal violet lactone is added.
  • the proportion of the acidic clay in the recording layer is 3.9 g / m 2
  • the recording layer contains the usual coating aids and a binder made from butadiene-styrene latex, which, based on the acidic clay, are present in an amount of 30% as further constituents .% is present.
  • the CF sheet After drying, the CF sheet is satinized and combined with a commercially available CB sheet to form a set of forms that can be used as a ticket after appropriate printing. If a handwritten entry is made on the CB sheet and an attempt is made to remove the copy made on the CF sheet by careful treatment with ethanol with the aim of replacing the original entry with another one, one clearly forms on the CF sheet recognizable blue coloration, which is caused by the solution of the crystal violet lactone caused by ethanol. The resulting blue color indicates an attempt to fake it.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Color Printing (AREA)

Abstract

L'invention concerne une feuille d'écriture d'une liasse carbonée permettant une meilleure identification de faux. Cette feuille d'écriture présente sur l'une de ses faces une couche d'écriture, renfermant un révélateur chromogène réagissant avec des précurseurs de colorants incolores. La couche d'écriture contient en outre au moins un précurseur de colorant sous forme solide facilement accessible et non isolé vis-à-vis du révélateur chromogène, la teneur en précurseur de colorant, par rapport au révélateur chromogène, étant inférieure à 1 % en poids.
PCT/EP1995/004685 1994-12-08 1995-11-29 Feuille d'ecriture d'une liasse carbonee WO1996017729A1 (fr)

Priority Applications (6)

Application Number Priority Date Filing Date Title
SI9530225T SI0796173T1 (en) 1994-12-08 1995-11-29 Imprint sheets of a self-copy set
CZ971739A CZ173997A3 (en) 1994-12-08 1995-11-29 Record sheet of tracing set of papers
DE59504843T DE59504843D1 (de) 1994-12-08 1995-11-29 Aufzeichnungsbogen eines durchschreibesatzes
AU41766/96A AU690783B2 (en) 1994-12-08 1995-11-29 Imprint sheets of a self-copy set
PL95320633A PL320633A1 (en) 1994-12-08 1995-11-29 Copied characters receiving sheet in a set of self-copying sheets
EP95940255A EP0796173B1 (fr) 1994-12-08 1995-11-29 Feuille d'ecriture d'une liasse autocopiante

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4443660A DE4443660C1 (de) 1994-12-08 1994-12-08 Aufzeichnungsbogen eines Durchschreibesatzes
DEP4443660.2 1994-12-08

Publications (1)

Publication Number Publication Date
WO1996017729A1 true WO1996017729A1 (fr) 1996-06-13

Family

ID=6535238

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP1995/004685 WO1996017729A1 (fr) 1994-12-08 1995-11-29 Feuille d'ecriture d'une liasse carbonee

Country Status (9)

Country Link
EP (1) EP0796173B1 (fr)
AU (1) AU690783B2 (fr)
CZ (1) CZ173997A3 (fr)
DE (2) DE4443660C1 (fr)
ES (1) ES2128108T3 (fr)
IL (1) IL116181A0 (fr)
PL (1) PL320633A1 (fr)
WO (1) WO1996017729A1 (fr)
ZA (1) ZA9510065B (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA2926436A1 (fr) 2013-10-07 2015-04-16 Judith Murrah Lecteur multimode d'image et spectral
CN106103121B (zh) * 2014-03-18 2019-12-06 亚普蒂恩(B.V.I.)公司 用于安全应用的加密光学标记物
US10745825B2 (en) 2014-03-18 2020-08-18 Apdn (B.V.I.) Inc. Encrypted optical markers for security applications
US10920274B2 (en) 2017-02-21 2021-02-16 Apdn (B.V.I.) Inc. Nucleic acid coated submicron particles for authentication

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2518871A1 (de) * 1974-04-26 1975-11-13 Portals Ltd Sicherheitsdokumente
DE2722427A1 (de) * 1977-05-18 1978-11-30 Juergen Dethloff Nachahmungs- und verfaelschungsgeschuetzter visuell und maschinell lesbarer beleg
DE3038178C1 (de) * 1980-10-09 1982-06-09 GAO Gesellschaft für Automation und Organisation mbH, 8000 München Gegen Radieren geschuetztes Sicherheitspapier
EP0156618A2 (fr) * 1984-03-20 1985-10-02 John Tythe Document de sécurité

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2518871A1 (de) * 1974-04-26 1975-11-13 Portals Ltd Sicherheitsdokumente
DE2722427A1 (de) * 1977-05-18 1978-11-30 Juergen Dethloff Nachahmungs- und verfaelschungsgeschuetzter visuell und maschinell lesbarer beleg
DE3038178C1 (de) * 1980-10-09 1982-06-09 GAO Gesellschaft für Automation und Organisation mbH, 8000 München Gegen Radieren geschuetztes Sicherheitspapier
EP0156618A2 (fr) * 1984-03-20 1985-10-02 John Tythe Document de sécurité

Also Published As

Publication number Publication date
ZA9510065B (en) 1996-06-29
PL320633A1 (en) 1997-10-13
AU690783B2 (en) 1998-04-30
AU4176696A (en) 1996-06-26
DE4443660C1 (de) 1995-10-26
EP0796173A1 (fr) 1997-09-24
EP0796173B1 (fr) 1999-01-13
ES2128108T3 (es) 1999-05-01
CZ173997A3 (en) 1997-11-12
IL116181A0 (en) 1996-01-31
DE59504843D1 (de) 1999-02-25

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