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GB1264781A - - Google Patents

Info

Publication number
GB1264781A
GB1264781A GB1264781DA GB1264781A GB 1264781 A GB1264781 A GB 1264781A GB 1264781D A GB1264781D A GB 1264781DA GB 1264781 A GB1264781 A GB 1264781A
Authority
GB
United Kingdom
Prior art keywords
irradiation
dye
sensitive
yellow
colour
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
Other languages
English (en)
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 filed Critical
Publication of GB1264781A publication Critical patent/GB1264781A/en
Expired legal-status Critical Current

Links

Classifications

    • 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
    • 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
    • D21H21/48—Elements suited for physical verification, e.g. by irradiation

Landscapes

  • Paper (AREA)
GB1264781D 1967-12-11 1967-12-11 Expired GB1264781A (fi)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB5629267 1967-12-11

Publications (1)

Publication Number Publication Date
GB1264781A true GB1264781A (fi) 1972-02-23

Family

ID=10476259

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1264781D Expired GB1264781A (fi) 1967-12-11 1967-12-11

Country Status (1)

Country Link
GB (1) GB1264781A (fi)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2905441A1 (de) * 1979-02-13 1980-08-21 Gao Ges Automation Org Wertpapier mit gedruckten echtheitskennzeichen in einer papierschicht
EP0279600A1 (en) * 1987-02-13 1988-08-24 Courtaulds Plc Marking

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2905441A1 (de) * 1979-02-13 1980-08-21 Gao Ges Automation Org Wertpapier mit gedruckten echtheitskennzeichen in einer papierschicht
EP0279600A1 (en) * 1987-02-13 1988-08-24 Courtaulds Plc Marking
WO1988006306A1 (en) * 1987-02-13 1988-08-25 Courtaulds Plc Marking

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Legal Events

Date Code Title Description
PS Patent sealed
PLNP Patent lapsed through nonpayment of renewal fees