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 machineInfo
- 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
Links
- 238000000034 method Methods 0.000 title abstract 2
- 239000000976 ink Substances 0.000 abstract 3
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>
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) |
-
1990
- 1990-06-29 IT IT02080690A patent/IT1249021B/en active IP Right Grant
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 |