EP0072481B1 - Fälschungssicheres Papier - Google Patents

Fälschungssicheres Papier Download PDF

Info

Publication number
EP0072481B1
EP0072481B1 EP82106954A EP82106954A EP0072481B1 EP 0072481 B1 EP0072481 B1 EP 0072481B1 EP 82106954 A EP82106954 A EP 82106954A EP 82106954 A EP82106954 A EP 82106954A EP 0072481 B1 EP0072481 B1 EP 0072481B1
Authority
EP
European Patent Office
Prior art keywords
paper
reagent
forgery
salts
proof
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
EP82106954A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0072481A1 (de
Inventor
Friedhelm Dr. Müller
Horst Dr. Nickel
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.)
Bayer AG
Original Assignee
Bayer 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 Bayer AG filed Critical Bayer AG
Publication of EP0072481A1 publication Critical patent/EP0072481A1/de
Application granted granted Critical
Publication of EP0072481B1 publication Critical patent/EP0072481B1/de
Expired legal-status Critical Current

Links

Classifications

    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • D21H21/00—Non-fibrous material added to the pulp, characterised by its function, form or properties; Paper-impregnating or coating material, characterised by its function, form or properties
    • D21H21/14—Non-fibrous material added to the pulp, characterised by its function, form or properties; Paper-impregnating or coating material, characterised by its function, form or properties characterised by function or properties in or on the paper
    • D21H21/40—Agents facilitating proof of genuineness or preventing fraudulent alteration, e.g. for security paper
    • D21H21/44—Latent security elements, i.e. detectable or becoming apparent only by use of special verification or tampering devices or methods
    • D21H21/46—Elements suited for chemical verification or impeding chemical tampering, e.g. by use of eradicators
    • 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
    • Y10S428/00—Stock material or miscellaneous articles
    • Y10S428/916—Fraud or tamper detecting

Definitions

  • a common counterfeiting method uses both a strong oxidizing agent and a reducing agent, such as the potassium permanganate / sodium bisulfite system - preferably in the acidic range. Potassium permanganate quickly and completely discolors ink; the resulting manganese dioxide is then made colorless with bisulfite. Eraser water on this basis is available in the form of ready-to-use solutions in small bottles (e.g. “lnk Eradicator Les Siamoises X 2”. I. Herbin S.A., Paris).
  • Suitable salts are, in particular, the alkali and alkaline earth salts, preferably the Na, K, Li, Mg, Ca or ammonium salts.
  • the papers according to the invention are produced in such a way that the compound of the formula (I) is applied during or after paper manufacture by adding it to the pulp or by applying it to the paper surface or by an appropriate surface treatment.
  • This compound is generally used in the form of the aqueous solution of its readily soluble salts, in particular alkali salts.
  • the paper is normally sized in the pulp, e.g. B. with resin glue. However, you can also omit the paper pulp sizing completely or partially and combine the anti-counterfeiting reagent with an anionic surface sizing agent, possibly also using starch at the same time. This allows the solution of the reagent to penetrate deeper into the paper and, at the same time as the equipment, the sizing required for writing on the paper is achieved.
  • Commercially available products are suitable as surface sizing agents, e.g. B. aqueous solutions or dispersions based on copolymers of maleic anhydride or their ammonium salts.
  • the paper treated with compound (1) becomes distinctly yellow when spotted with a dilute potassium permanganate solution and also remains yellow when the dark brown manganese oxides formed on the paper are decolorized with a dilute solution of sodium bisulfite.
  • the reagent can also be added to the paper pulp (i.e. the paper fiber suspension).
  • the yield in paper can be improved by adding aluminum sulfate or cationic retention or fixing agents (e.g. based on polyacrylamide, polyamidamine or dicyandiamide formaldehyde).
  • aluminum sulfate or cationic retention or fixing agents e.g. based on polyacrylamide, polyamidamine or dicyandiamide formaldehyde.
  • 0.1-5% reagent (based on the paper pulp) is required for this production variant.

Landscapes

  • Paper (AREA)
EP82106954A 1981-08-14 1982-08-02 Fälschungssicheres Papier Expired EP0072481B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3132146 1981-08-14
DE19813132146 DE3132146A1 (de) 1981-08-14 1981-08-14 Faelschungssicheres papier

Publications (2)

Publication Number Publication Date
EP0072481A1 EP0072481A1 (de) 1983-02-23
EP0072481B1 true EP0072481B1 (de) 1986-12-30

Family

ID=6139305

Family Applications (1)

Application Number Title Priority Date Filing Date
EP82106954A Expired EP0072481B1 (de) 1981-08-14 1982-08-02 Fälschungssicheres Papier

Country Status (4)

Country Link
US (1) US4478681A (https=)
EP (1) EP0072481B1 (https=)
JP (1) JPS5836298A (https=)
DE (2) DE3132146A1 (https=)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19936030A1 (de) * 1999-07-30 2001-02-08 Mitsubishi Hitec Paper Flensbu Aufzeichnungspapier mit einer Kombination mehrerer Sicherheitsmerkmale

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3918765A1 (de) * 1989-06-08 1990-12-13 Drewsen Spezialpapiere Sicherheitspapier zur herstellung von dokumenten
US5304587A (en) * 1991-12-19 1994-04-19 Moore Business Forms, Inc. Water resistant security ink composition
US5720801A (en) * 1996-11-06 1998-02-24 Nadan; Wendy Water resistant security ink composition
ES2181470T3 (es) 1998-09-19 2003-02-16 Mitsubishi Hitec Paper Flensbu Materiales de registro sensibles al calor y procedimiento para la prueba de autenticidad.
FI122297B (fi) * 2003-10-27 2011-11-15 M Real Oyj Kartonki ja menetelmä sen valmistamiseksi
AU2006248986B2 (en) 2005-05-18 2011-08-11 Basf Se 1-phenoxy-2-propanol as a formulating aid for dyes
BRPI0610829A2 (pt) * 2005-05-18 2010-07-27 Ciba Sc Holding Ag soluções aquosas de corantes diretos
FR2970716B1 (fr) 2011-01-25 2013-09-06 Honnorat Rech S & Services Papier de securite infalsifiable aux solvants
FR2981955B1 (fr) 2011-10-26 2013-11-01 Honnorat Rech S & Services Papier de securite infalsifiable aux agents oxydo-reducteurs

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2061632A (en) * 1932-07-22 1936-11-24 Du Pont Safety paper and the like
US2075538A (en) * 1932-08-02 1937-03-30 Milton C Johnson Company Safety paper
CH487980A (de) * 1966-11-15 1970-03-31 Du Pont Verfahren zur Herstellung von Papierfarbstoffen
CH617220A5 (en) * 1972-06-09 1980-05-14 Ciba Geigy Ag Process for preparing new polyazo dyes
US4024125A (en) * 1973-01-19 1977-05-17 Hoechst Aktiengesellschaft Dis-azo pigments deriving from bis-diazotized diamino-2-phenyl-benzazolones
GB1425881A (en) * 1973-05-04 1976-02-18 Ici Ltd Cationic monoazo dyestuffs

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19936030A1 (de) * 1999-07-30 2001-02-08 Mitsubishi Hitec Paper Flensbu Aufzeichnungspapier mit einer Kombination mehrerer Sicherheitsmerkmale

Also Published As

Publication number Publication date
EP0072481A1 (de) 1983-02-23
US4478681A (en) 1984-10-23
JPH0149840B2 (https=) 1989-10-26
DE3274888D1 (en) 1987-02-05
DE3132146A1 (de) 1983-03-03
JPS5836298A (ja) 1983-03-03

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