EP1064424A1 - Improved process for the preparation of security thread - Google Patents
Improved process for the preparation of security threadInfo
- Publication number
- EP1064424A1 EP1064424A1 EP99906557A EP99906557A EP1064424A1 EP 1064424 A1 EP1064424 A1 EP 1064424A1 EP 99906557 A EP99906557 A EP 99906557A EP 99906557 A EP99906557 A EP 99906557A EP 1064424 A1 EP1064424 A1 EP 1064424A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- water
- security thread
- soluble ink
- ink layer
- security
- 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.)
- Granted
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
- D21H21/42—Ribbons or strips
Definitions
- the present invention relates to an improved process for the preparation of security threads suitable for use in security articles.
- Security documents such as bank notes, stocks, bonds, checks, warrants and identification cards need to be guarded by antifalsification measures and they are often made from a security paper having a security element in the form of fibers, strips or threads embedded therein.
- GB 2,213,098 discloses a partially metallized film strip, used as a security thread, which has metal-free portions in the form of a pattern, design, indicia, etc. to provide a continuous metal path along the length of the strip ' .
- Japanese Laid-open Patent Publication No. 216795/1988 teaches a security strip having a metallized pattern on the surface of a transparent film.
- an object of the present invention to provide an improved process for preparing a security thread suitable for use in a security paper.
- a process for the preparation of a security thread having a partially metallized layer which comprises: forming a water-soluble ink layer on a selected portion of the surface of a transparent film; depositing a layer of a metal selected from the group consisting of aluminum, tin, silver and an alloy of cobalt and nickel on the entire surface of the transparent film including the water-soluble ink layer; and washing the metal deposited film with water to ' remove the portion of the metal layer deposited on the water-soluble ink layer.
- Figs. 5 to 8 illustrate other embodiments of security threads prepared in accordance with the inventive process.
- a water-based ink which is soluble in water, is printed on a selected portion of the surface of a transparent film substrate, in the form of a character, pattern or figure to form a partial water- soluble ink layer.
- the substrate may be made from any material known in the art such as a polyester (e.g., polyethylene terephthalate (PET) ) , polyvinyl chloride, polypropylene and the like.
- PET polyethylene terephthalate
- the water-based ink may be any one conventionally used in the art.
- a layer of a metal is deposited on the entire surface of the film including the printed ink layer.
- the deposition may be carried out by vacuum deposition methods which are well known by a skilled person in the art.
- Representative examples of the metal suitable for forming the metal layer are aluminum, tin, a metal alloy (e.g., Co and Ni) , silver and the like.
- the thickness of the metal layer ranges from 1 A to 2 ⁇ m.
- the metal-deposited film is washed with -4- water, preferably with brushing, to remove the portion of the metal layer deposited on the water-soluble ink layer, to obtain a film having a partially metallized layer.
- a security thread having a enhanced security feature may be obtained by employing a fluorescent pigment or dyestuff to provide a partially metallized film having both a demetallized portion and a dyed portion.
- a partial coating of the fluorescent pigment or dyestuff is applied to a selected portion of the film surface prior to the step of printing the water-soluble ink.
- the water-soluble ink layer may be so formed as to mask the dyed portion.
- the fluorescent pigment or dyestuff may be any one conventionally used in the art and the coating thereof may be applied in the form of a character, pattern or figure, or a combination thereof, preferably by a gravure printing method.
- the security thread of the present invention has a thickness and width suitable for use in security documents, e.g., a thickness ranging from about 15 to 35 ⁇ m and a width ranging from 0.5 to 5 mm.
- the security thread of the present invention may be preferably embedded between two sheets of paper formed separately on a paper making machine and subsequently brought together to form a security paper having an embedded security thread.
- Figs. 1 to 4 show the steps of forming a partially- metallized film having a transparent region in the form of a set of characters and a dyed region in the form of another set of characters in accordance with one embodiment of the present invention.
- a fluorescent dyestuff or pigment composition such as Lumilux CD 305, CD 316 or Papilion is applied in the form of a set of characters (2) on the surface of a transparent polyester substrate (10) at a regular interval by a gravure printing method.
- a water-based ink is printed on the film to form a mask (30) of the printed characters portion (2) and, simultaneously, a design (31) in the form of another set of characters .
- Aluminum is deposited on the resulting film by a vacuum deposition method to form an aluminum layer (4) at a thickness of 1 A to 2 ⁇ m over the entire surface of the film, as shown in Fig. 3.
- an aluminum-deposited film (1) comprising transparent characters (5) (corresponds to the design (31) ) and printed characters (2) positioned in a transparent region (10) .
- Figs. 5 to 8 illustrate other embodiments of security threads prepared by the inventive process.
- -6- Fig. 5 shows a security thread (1) having alternating metal- deposited portion (4) comprising transparent characters (5) , and transparent substrate region (10) comprising colored characters (2) at a regular interval.
- a metallized security thread (1) having various patterns of colored regions (2) , optionally positioned in transparent regions.
- Fig. 7 shows a security thread (1) produced by forming metallized bands (4) in a regular pattern on a transparent base film (10), and
- Fig. 8 shows a security thread (1) obtained by a chain of imprinting alternating colored (2) and metallized links (4) on a base film (10) .
Landscapes
- Paper (AREA)
- Credit Cards Or The Like (AREA)
- Laminated Bodies (AREA)
- Printing Methods (AREA)
- Air Bags (AREA)
- Polymerisation Methods In General (AREA)
Abstract
Description
Claims
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR9806706 | 1998-03-02 | ||
KR1019980006706A KR19990073639A (en) | 1998-03-02 | 1998-03-02 | Manufacturing method of silver wire with partial deposition part and colored printing layer |
PCT/KR1999/000089 WO1999045199A1 (en) | 1998-03-02 | 1999-02-26 | Improved process for the preparation of security thread |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1064424A1 true EP1064424A1 (en) | 2001-01-03 |
EP1064424B1 EP1064424B1 (en) | 2005-09-14 |
Family
ID=19534044
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP99906557A Expired - Lifetime EP1064424B1 (en) | 1998-03-02 | 1999-02-26 | Improved process for the preparation of security thread |
Country Status (8)
Country | Link |
---|---|
EP (1) | EP1064424B1 (en) |
KR (1) | KR19990073639A (en) |
CN (1) | CN1107764C (en) |
AT (1) | ATE304627T1 (en) |
DE (1) | DE69927248T2 (en) |
ES (1) | ES2245090T3 (en) |
RU (1) | RU2188268C2 (en) |
WO (1) | WO1999045199A1 (en) |
Families Citing this family (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2856339B1 (en) † | 2003-06-23 | 2006-05-26 | Banque De France | SECURITY BAND FOR DOCUMENTATION AND SECURE DOCUMENT |
AT504750B1 (en) * | 2003-09-17 | 2009-01-15 | Hueck Folien Gmbh | METHOD FOR PRODUCING A SECURITY ELEMENT WITH NEGATIVE COLOR CODINGS, IF APPLICABLE |
EP1516957A1 (en) * | 2003-09-17 | 2005-03-23 | Hueck Folien Ges.m.b.H | Security element with colored indicia |
CN1329587C (en) * | 2004-10-22 | 2007-08-01 | 中国印钞造币总公司 | Anti-false paper and manufacturing method thereof |
CN1313676C (en) * | 2004-10-25 | 2007-05-02 | 中国印钞造币总公司 | Composite false-proof safety thread and its production method, false-proof paper applying the safety thread |
GB2429187B (en) | 2005-08-15 | 2007-08-08 | Rue De Int Ltd | Security devices for security substrates |
CN101314311B (en) * | 2007-05-30 | 2011-06-15 | 中国印钞造币总公司 | False proof thin film and producing method thereof |
DE102008030409A1 (en) † | 2008-06-27 | 2009-12-31 | Giesecke & Devrient Gmbh | Safety element with recess and method for producing the same |
US20120094038A1 (en) * | 2010-10-13 | 2012-04-19 | Honeywell International Inc. | Use of humidity stable yellow fluorescent pigments in security applications |
KR20160083200A (en) | 2014-12-30 | 2016-07-12 | 한국조폐공사 | Forgery prevention security thread, and manufacturing method thereof |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2570101B1 (en) * | 1984-09-07 | 1987-09-25 | Sotimag | ANTI-FRAUD PROCESS FOR VALUE DOCUMENTS |
JPH03152583A (en) * | 1989-11-09 | 1991-06-28 | Kiso Kasei Sangyo Kk | Film for preventing copy |
-
1998
- 1998-03-02 KR KR1019980006706A patent/KR19990073639A/en not_active Application Discontinuation
-
1999
- 1999-02-26 AT AT99906557T patent/ATE304627T1/en not_active IP Right Cessation
- 1999-02-26 CN CN99803609.9A patent/CN1107764C/en not_active Expired - Lifetime
- 1999-02-26 WO PCT/KR1999/000089 patent/WO1999045199A1/en active IP Right Grant
- 1999-02-26 DE DE69927248T patent/DE69927248T2/en not_active Expired - Lifetime
- 1999-02-26 RU RU2000124869/12A patent/RU2188268C2/en active
- 1999-02-26 ES ES99906557T patent/ES2245090T3/en not_active Expired - Lifetime
- 1999-02-26 EP EP99906557A patent/EP1064424B1/en not_active Expired - Lifetime
Non-Patent Citations (1)
Title |
---|
See references of WO9945199A1 * |
Also Published As
Publication number | Publication date |
---|---|
CN1292054A (en) | 2001-04-18 |
CN1107764C (en) | 2003-05-07 |
DE69927248D1 (en) | 2005-10-20 |
WO1999045199A1 (en) | 1999-09-10 |
RU2188268C2 (en) | 2002-08-27 |
EP1064424B1 (en) | 2005-09-14 |
KR19990073639A (en) | 1999-10-05 |
ES2245090T3 (en) | 2005-12-16 |
ATE304627T1 (en) | 2005-09-15 |
DE69927248T2 (en) | 2006-01-12 |
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