IT1249021B - Method for printing paper money, negotiable instruments and the like incorporating marks invisible to the naked eye but automatically revealable in the event of reproduction by photocopying machine - Google Patents

Method for printing paper money, negotiable instruments and the like incorporating marks invisible to the naked eye but automatically revealable in the event of reproduction by photocopying machine

Info

Publication number
IT1249021B
IT1249021B IT02080690A IT2080690A IT1249021B IT 1249021 B IT1249021 B IT 1249021B IT 02080690 A IT02080690 A IT 02080690A IT 2080690 A IT2080690 A IT 2080690A IT 1249021 B IT1249021 B IT 1249021B
Authority
IT
Italy
Prior art keywords
revealable
reproduction
printed
ground
event
Prior art date
Application number
IT02080690A
Other languages
Italian (it)
Other versions
IT9020806A0 (en
IT9020806A1 (en
Inventor
Luciano Abbatinali
Maria Pia Donzelli
Original Assignee
Calcografia & Cartevalori S P
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 Calcografia & Cartevalori S P filed Critical Calcografia & Cartevalori S P
Priority to IT02080690A priority Critical patent/IT1249021B/en
Publication of IT9020806A0 publication Critical patent/IT9020806A0/it
Publication of IT9020806A1 publication Critical patent/IT9020806A1/en
Application granted granted Critical
Publication of IT1249021B publication Critical patent/IT1249021B/en

Links

Landscapes

  • Printing Methods (AREA)
  • Cleaning In Electrography (AREA)

Abstract

The method comprises the preparation of a first film 1, 101 having transparent marks 2, 102 on a dark ground 3, 103 and of a second film 5, 11 having the same marks 6, 12 in a medium or dark colour on a transparent ground 7, 13. The first film 1, 101 is then printed using a first ink of predetermined colour and of an intensity such as to produce a printed ground 4, 10 of desired colour and intensity. Finally the second film 5, 11 is printed on the first print 40, 42 using a second ink of the same colour as the first but of a different intensity such as to produce printed marks apparently of the same colour and of the same intensity as the printed ground 4, 10 and therefore not visually distinguishable from the latter, but nevertheless revealable against the said ground in the event of reproduction on a photocopying machine sensitive to the different intensities of the printing inks. (Fig. 5) <IMAGE>
IT02080690A 1990-06-29 1990-06-29 Method for printing paper money, negotiable instruments and the like incorporating marks invisible to the naked eye but automatically revealable in the event of reproduction by photocopying machine IT1249021B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
IT02080690A IT1249021B (en) 1990-06-29 1990-06-29 Method for printing paper money, negotiable instruments and the like incorporating marks invisible to the naked eye but automatically revealable in the event of reproduction by photocopying machine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT02080690A IT1249021B (en) 1990-06-29 1990-06-29 Method for printing paper money, negotiable instruments and the like incorporating marks invisible to the naked eye but automatically revealable in the event of reproduction by photocopying machine

Publications (3)

Publication Number Publication Date
IT9020806A0 IT9020806A0 (en) 1990-06-29
IT9020806A1 IT9020806A1 (en) 1991-12-29
IT1249021B true IT1249021B (en) 1995-02-11

Family

ID=11172335

Family Applications (1)

Application Number Title Priority Date Filing Date
IT02080690A IT1249021B (en) 1990-06-29 1990-06-29 Method for printing paper money, negotiable instruments and the like incorporating marks invisible to the naked eye but automatically revealable in the event of reproduction by photocopying machine

Country Status (1)

Country Link
IT (1) IT1249021B (en)

Also Published As

Publication number Publication date
IT9020806A0 (en) 1990-06-29
IT9020806A1 (en) 1991-12-29

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Legal Events

Date Code Title Description
0001 Granted