WO2010077837A2 - Planchettes contenant un pigment ou un colorant variable pour article sécurisé - Google Patents
Planchettes contenant un pigment ou un colorant variable pour article sécurisé Download PDFInfo
- Publication number
- WO2010077837A2 WO2010077837A2 PCT/US2009/067964 US2009067964W WO2010077837A2 WO 2010077837 A2 WO2010077837 A2 WO 2010077837A2 US 2009067964 W US2009067964 W US 2009067964W WO 2010077837 A2 WO2010077837 A2 WO 2010077837A2
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- pigment
- planchettes
- color
- inconstant
- planchette
- Prior art date
Links
- 239000000049 pigment Substances 0.000 title claims abstract description 73
- 239000000758 substrate Substances 0.000 claims abstract description 36
- 238000000034 method Methods 0.000 claims abstract description 10
- 230000001788 irregular Effects 0.000 claims abstract description 4
- 239000000463 material Substances 0.000 claims description 10
- 229910052747 lanthanoid Inorganic materials 0.000 claims description 9
- 150000002602 lanthanoids Chemical class 0.000 claims description 9
- 239000002096 quantum dot Substances 0.000 claims description 8
- 230000005855 radiation Effects 0.000 claims description 6
- NKCVNYJQLIWBHK-UHFFFAOYSA-N carbonodiperoxoic acid Chemical compound OOC(=O)OO NKCVNYJQLIWBHK-UHFFFAOYSA-N 0.000 claims description 5
- 150000001875 compounds Chemical class 0.000 claims description 5
- 239000000203 mixture Substances 0.000 claims description 5
- 239000003446 ligand Substances 0.000 claims description 4
- 238000004519 manufacturing process Methods 0.000 claims description 4
- 239000004753 textile Substances 0.000 claims description 4
- 229910019142 PO4 Inorganic materials 0.000 claims description 3
- RNWFKWFGZIKYEO-UHFFFAOYSA-N [Y].[Ho] Chemical compound [Y].[Ho] RNWFKWFGZIKYEO-UHFFFAOYSA-N 0.000 claims description 3
- 229920002678 cellulose Polymers 0.000 claims description 3
- 239000001913 cellulose Substances 0.000 claims description 3
- 239000002159 nanocrystal Substances 0.000 claims description 3
- NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 claims description 3
- 239000010452 phosphate Substances 0.000 claims description 3
- YTDHEFNWWHSXSU-UHFFFAOYSA-N 2,3,5,6-tetrachloroaniline Chemical compound NC1=C(Cl)C(Cl)=CC(Cl)=C1Cl YTDHEFNWWHSXSU-UHFFFAOYSA-N 0.000 claims description 2
- FWTBRYBHCBCJEQ-UHFFFAOYSA-N 4-[(4-phenyldiazenylnaphthalen-1-yl)diazenyl]phenol Chemical compound C1=CC(O)=CC=C1N=NC(C1=CC=CC=C11)=CC=C1N=NC1=CC=CC=C1 FWTBRYBHCBCJEQ-UHFFFAOYSA-N 0.000 claims description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 2
- BVKZGUZCCUSVTD-UHFFFAOYSA-L Carbonate Chemical compound [O-]C([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-L 0.000 claims description 2
- MUBZPKHOEPUJKR-UHFFFAOYSA-N Oxalic acid Chemical compound OC(=O)C(O)=O MUBZPKHOEPUJKR-UHFFFAOYSA-N 0.000 claims description 2
- UCKMPCXJQFINFW-UHFFFAOYSA-N Sulphide Chemical compound [S-2] UCKMPCXJQFINFW-UHFFFAOYSA-N 0.000 claims description 2
- 239000006096 absorbing agent Substances 0.000 claims description 2
- 150000004820 halides Chemical class 0.000 claims description 2
- 229910052746 lanthanum Inorganic materials 0.000 claims description 2
- 230000003647 oxidation Effects 0.000 claims description 2
- 238000007254 oxidation reaction Methods 0.000 claims description 2
- XTQHKBHJIVJGKJ-UHFFFAOYSA-N sulfur monoxide Chemical compound S=O XTQHKBHJIVJGKJ-UHFFFAOYSA-N 0.000 claims description 2
- 229920000642 polymer Polymers 0.000 claims 2
- 239000002994 raw material Substances 0.000 claims 2
- XGUIBIPZEUWMFE-UHFFFAOYSA-N [S-2].[Y+3].[Ho+3].[S-2].[S-2] Chemical compound [S-2].[Y+3].[Ho+3].[S-2].[S-2] XGUIBIPZEUWMFE-UHFFFAOYSA-N 0.000 claims 1
- ZZFYTFOPWFUORD-UHFFFAOYSA-K holmium(3+) neodymium(3+) yttrium(3+) phosphate sulfide Chemical compound [S-2].[Y+3].[Ho+3].P(=O)([O-])([O-])[O-].[Nd+3] ZZFYTFOPWFUORD-UHFFFAOYSA-K 0.000 claims 1
- 235000013968 mica-based pearlescent pigment Nutrition 0.000 claims 1
- 239000000976 ink Substances 0.000 abstract description 22
- 239000000975 dye Substances 0.000 abstract description 19
- 230000003595 spectral effect Effects 0.000 abstract description 12
- 230000000694 effects Effects 0.000 abstract description 11
- 239000000835 fiber Substances 0.000 abstract description 11
- 238000009826 distribution Methods 0.000 abstract description 8
- 239000003086 colorant Substances 0.000 abstract description 3
- 238000010521 absorption reaction Methods 0.000 description 6
- 238000000576 coating method Methods 0.000 description 5
- 239000011248 coating agent Substances 0.000 description 4
- 238000007639 printing Methods 0.000 description 4
- 239000000126 substance Substances 0.000 description 4
- 239000002966 varnish Substances 0.000 description 3
- 229920000742 Cotton Polymers 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 230000003247 decreasing effect Effects 0.000 description 2
- -1 oxide Chemical compound 0.000 description 2
- 230000036961 partial effect Effects 0.000 description 2
- JTJMJGYZQZDUJJ-UHFFFAOYSA-N phencyclidine Chemical compound C1CCCCN1C1(C=2C=CC=CC=2)CCCCC1 JTJMJGYZQZDUJJ-UHFFFAOYSA-N 0.000 description 2
- 229920000728 polyester Polymers 0.000 description 2
- 238000012795 verification Methods 0.000 description 2
- 238000001429 visible spectrum Methods 0.000 description 2
- CPELXLSAUQHCOX-UHFFFAOYSA-M Bromide Chemical compound [Br-] CPELXLSAUQHCOX-UHFFFAOYSA-M 0.000 description 1
- 229910052684 Cerium Inorganic materials 0.000 description 1
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 description 1
- 229910052692 Dysprosium Inorganic materials 0.000 description 1
- 229910052691 Erbium Inorganic materials 0.000 description 1
- 229910052693 Europium Inorganic materials 0.000 description 1
- KRHYYFGTRYWZRS-UHFFFAOYSA-M Fluoride anion Chemical compound [F-] KRHYYFGTRYWZRS-UHFFFAOYSA-M 0.000 description 1
- 229910052688 Gadolinium Inorganic materials 0.000 description 1
- 229910052689 Holmium Inorganic materials 0.000 description 1
- 229910052779 Neodymium Inorganic materials 0.000 description 1
- 229910052777 Praseodymium Inorganic materials 0.000 description 1
- 229920001131 Pulp (paper) Polymers 0.000 description 1
- 229910052772 Samarium Inorganic materials 0.000 description 1
- 229910052771 Terbium Inorganic materials 0.000 description 1
- 229910052775 Thulium Inorganic materials 0.000 description 1
- 229910052769 Ytterbium Inorganic materials 0.000 description 1
- 230000002745 absorbent Effects 0.000 description 1
- 239000002250 absorbent Substances 0.000 description 1
- 229910052768 actinide Inorganic materials 0.000 description 1
- 150000001255 actinides Chemical class 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 238000012777 commercial manufacturing Methods 0.000 description 1
- 230000001010 compromised effect Effects 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 238000005286 illumination Methods 0.000 description 1
- 238000010348 incorporation Methods 0.000 description 1
- 238000007641 inkjet printing Methods 0.000 description 1
- 230000000670 limiting effect Effects 0.000 description 1
- 239000010445 mica Substances 0.000 description 1
- 229910052618 mica group Inorganic materials 0.000 description 1
- DZNFWGVDYGAMJB-UHFFFAOYSA-K neodymium(3+);phosphate Chemical compound [Nd+3].[O-]P([O-])([O-])=O DZNFWGVDYGAMJB-UHFFFAOYSA-K 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 229920006267 polyester film Polymers 0.000 description 1
- 238000004080 punching Methods 0.000 description 1
- 229910052761 rare earth metal Inorganic materials 0.000 description 1
- 230000002441 reversible effect Effects 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
- 125000000391 vinyl group Chemical group [H]C([*])=C([H])[H] 0.000 description 1
- 229920002554 vinyl polymer Polymers 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
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
-
- G—PHYSICS
- G07—CHECKING-DEVICES
- G07D—HANDLING OF COINS OR VALUABLE PAPERS, e.g. TESTING, SORTING BY DENOMINATIONS, COUNTING, DISPENSING, CHANGING OR DEPOSITING
- G07D7/00—Testing specially adapted to determine the identity or genuineness of valuable papers or for segregating those which are unacceptable, e.g. banknotes that are alien to a currency
- G07D7/06—Testing specially adapted to determine the identity or genuineness of valuable papers or for segregating those which are unacceptable, e.g. banknotes that are alien to a currency using wave or particle radiation
- G07D7/12—Visible light, infrared or ultraviolet radiation
Definitions
- covert There are three classes of security features: covert; semi-overt; and overt.
- Covert applications require expensive and complex analytical equipment for authentication; semi-overt applications require simple and readily available equipment for verification; whereas overt features do not require the use of a device.
- Many covert features have been introduced in the past few years and there is a particular need for the development of overt and semi-overt security features to increase confidence in the legitimacy of secure documents as traditional overt features, such as holograms, are now commonly replicated.
- planchettes, fibers and threads in secure articles, such as banknotes is widely known and is described in Optical Document Security, 3rd Ed., R. van Renesse, Artech House Publishers.
- planchette is defined as a small colored form, such as a fiber, a regular shape such as a circle, an irregular shape, or a thread or stripe running throughout the length of the document.
- planchettes may then be added to the pulped substrate prior to being formed, so that they form an integral part of the finished substrate. See diagrams 1, 2, 3 and 4 respectively for examples of planchette forms.
- the planchettes range in dimension from about 5 mm to about 0.5 mm in the case of fibers. However other maxima and minima are possible.
- the present invention discloses the use of planchettes colored with an ultra color inconstant pigment embedded in a substrate.
- the document containing the planchettes is simply authenticated by the use of two readily available light sources of different energy distributions. This method of counterfeit protection addresses some of the aforementioned problems.
- Color inconstant pigments exhibit a dramatic color change ( ⁇ E) due to a change in their own color coordinates and do not need a second ink to demonstrate this.
- This color change occurs due to the absorption bands of these pigments which are distinct in the visible spectrum.
- the pigment appears one color, but when viewed under light of a discrete spectral distribution, the wavelengths available for absorption/reflection are decreased and the pigment appears as a different color.
- WO2007041579 and PCT/US2007/021021 give further definitions of color inconstancy and examples of appropriate compounds. These compounds exhibit many benefits over traditional pigments and some used in secure documents as security features, such as fluorescent pigments, in that they exhibit excellent lightfastness and resistance to degradation by chemicals. These properties are essential for use in secure articles as their use times tend to be long and it is a requisite of security features that they do not fail during the lifetime of the document.
- JP2001159094 A refers to planchettes or fibers coated with metameric inks and describes planchettes coated with two different inks which are needed to authenticate the document.
- the present invention is a simple, easily communicated concept that does not require a complex or costly authentication device. Both of these factors should make it attractive to potential clients.
- planchettes incorporated into the substrate of secure articles, such as bank notes, passports and tax stamps.
- planchettes may take various forms, such as fibers; regular shapes (such as circles or stars); irregular shapes (such as polygons); or as threads or stripes running throughout the length of the document and are colored with an ultra color inconstant pigment or dye. Ultra color inconstant pigments and dyes appear as markedly different colors under light sources with differing spectral distributions.
- a partial list of examples of color inconstant pigments and dyes includes, but is not limited to: Pigments CR, P8 and CB7 from Stardust Materials LLC; Pigment violet 55; Quantum dot nanocrystals, which are crystals composed of transition elements, lanthanides and actinides and which range from about 2 to about 10 nanometers (10-50 atoms) in diameter, such as neodymium phosphate holmiurn-yttrium sulfide fused quantum dot, holmium-yttrium hydroxycarbonate fused quantum dot, and likewise for other rare earth elements; pigments comprising a lanthanide-based material with the appropriate counterion/ligand for the oxidation state of the given lanthanide - the lanthanides include La, Ce, Pr, Nd, Pm, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm and Yb; and the counterions/ligands include, but are not limited to phosphate, oxide
- planchettes are coated with an ink containing a color inconstant pigment or dye and function as a method of authenticating the document.
- the planchettes change color at the same time. The effect is striking and proves the document to be genuine. This allows for facile authentication without the need of complex or costly equipment.
- the bulk of the substrate may also be colored to match the appearance of the planchettes under one illuminant, so that the planchettes only become visible when the spectral characteristics of the light source are changed.
- the planchettes may be colored to match the appearance of the substrate so that the planchettes only become visible when the spectral characteristics of the light source are changed
- the present invention needs only two differing light sources, one that is of a broad spectral distribution and another that is discrete.
- Commercially available light boxes generally contain two such light sources.
- non-color inconstant pigments or dyes into the planchettes to augment the color inconstant effect or to add other security effects, such as near infra red absorbency.
- some color inconstant pigments exhibit properties which may be exploited as a covert security feature, such as near infra red absorbency, up conversion and down conversion.
- non-color inconstant pigments and dyes includes, but is not limited to: Pigment Yellow 12, 13, 14, 83, 150, 128; Pigment Blue 15.3, 15:4, 61; Pigment Red 22, 48, 52, 57.1, 57.2, 122, 252; Pigment green 7, 36; Pigment black 7; Pigment Orange 13, 16, 34, 73; Pigment violet 3, 23, 19; Aluminum phthalocyanine chloride dye; special effect pigments such as mica based pearlescent and iridescent pigments.
- Non-color inconstant pigments or dyes can be used alone or in blends, or in combination with color inconstant pigments or dyes.
- both sides of the substrate are coated as the orientation of the planchette within the finished substrate cannot be predetermined.
- a plurality of color inconstant pigments/dyes and non-color inconstant pigments/dyes may be used to enhance the color inconstant effect and or to create a pleasing visual effect.
- the color inconstant pigment containing layer may be overprinted with other layers, usually clear layers, to provide chemical and physical resistance and/or to ensure a good affinity to the substrate pulp to make sure that the planchette becomes an integral part of the end document.
- the pulp of the substrate is colored so that it matches the appearance of the color inconstant pigment under one light source.
- the planchettes are indistinguishable from the bulk of the substrate and suddenly "appear” when the spectral distribution of the light source is changed.
- ink printed onto the surface of the document is matched to one color of the planchettes to further enhance the effect.
- the planchettes contain at least one further security feature for example, up-converters; down-converters; infra red absorbers; infra red transparent compounds; piezochromics; and thermochromics.
- Up-converters are materials which absorb lower energy radiation and then re-emit this as higher energy radiation, for example, absorption of infra red and emission of visible light. This is achieved by emission of one photon of high energy for two or more photons of lower energy absorbed.
- Down-converters have the reverse properties in that they absorb radiation of higher energy than they emit. For example, UV fluorescent materials absorb UV radiation and emit visible light.
- the up-converters, down-converters or other security features could be incorporated in the following ways; added to the ink used to coat the planchettes, added to the material used to form the planchette or incorporated into an overprint varnish applied over the color inconstant coated stock before the individual planchettes are formed.
- Secure documents including this feature cannot be simply reproduced by color photocopying or scanning. As a special pigment/dye is used, reproduction using standard inks will not demonstrate the effect. The color reproduced will depend on the light source used by the scanner or photocopier.
- a color inconstant pigment was dispersed into a suitable varnish in a 50:50 ratio by stirring and was then passed over a triple roll mill. The resulting ink was coated onto both sides of a carrier substrate which was then processed to form planchettes. These planchettes were then incorporated into a textile fiber pulp which was then used to form paper.
- 5Og color inconstant pigment (CR8, Stardust Materials LLC) was stirred into 50g solvent based vinyl varnish (Vynaglaze 4795, Sun Chemical) using a Dispermat. The resulting mixture was passed over a triple roll mill to achieve a fine dispersion. This ink was then screen printed using a 43 mesh screen onto both sides of heat stabilized polyester (Autostat CT3, MacDermid Autotype Ltd.). Circular planchettes of diameter 5 mm were then punched out of the coated polyester and added to a cotton and linen fiber pulp. The pulp was distributed over a 12-300 mesh screen and allowed to drain. After most of the moisture had been removed, the screen was laid over an absorbent substrate and pressure applied until completely dry. The formed paper was lifted off the screen and had planchettes distributed throughout.
- planchettes of example 1 were incorporated into pulp which was colored to match the appearance of the pigment under a broad band illuminant, in this example a creamy yellow color.
- the pulp was further processed to form paper in which the planchettes are not discernable under a broad band illuminant such as daylight, but then "appear" when observed under a discrete band light source such as point of sale lighting.
- planchettes would be fabricated and incorporated into a substrate in a commercial manufacturing setting is as follows:
- Color inconstant ink/coating is deposited onto a moving filmic substrate via gravure, flexographic, screen, Mayer bar or other means.
- the coated substrate is cut into planchettes to a pre-described shape and size.
- planchettes are added and mixed with the pre-dyed paper pulp before the formation of the finished paper web.
- Figure 1 shows a sample of paper produced with circular color inconstant planchettes.
- Figure 2 shows a sample of paper produced with star shaped color inconstant planchettes.
- Figure 3 shows a sample of paper produced with color inconstant fibers.
- Figure 4 shows a sample of paper produced with a continuous color inconstant thread running throughout the substrate.
Abstract
La présente invention concerne des planchettes incorporées dans le substrat d'articles sécurisés, tels que des billets de banque, des passeports et des timbres fiscaux. Ces planchettes peuvent prendre une diversité de formes (par exemple des fibres), des formes régulières (par exemple des cercles), des formes irrégulières (par exemple des polygones) ou peuvent se présenter sous la forme de fils ou de bandes qui s'étendent sur toute la longueur du document et qui sont colorées avec un pigment ou un colorant variable ultra coloré, ou un pigment ou un colorant variable incolore, ou une combinaison de ceux-ci. La couleur des pigments et des colorants variables ultra colorés apparaît comme une couleur nettement différente sous des sources de lumière de distributions spectrales différentes. Les planchettes sont revêtues d'une encre contenant un pigment variable coloré et sert de procédé d'authentification du document. Lorsque la source de lumière sous laquelle l'article est examiné est modifiée, les planchettes changent de couleur en même temps. L'effet est frappant et prouve que le document est authentique. Ceci permet une authentification facile sans nécessité d'équipement complexe ou coûteux. La masse du substrat peut également être colorée de façon à correspondre à l'aspect des planchettes sous un éclairage, de telle sorte qu'elles ne deviennent visibles que lorsque les caractéristiques spectrales de la source de lumière sont modifiées.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US12292208P | 2008-12-16 | 2008-12-16 | |
| US61/122,922 | 2008-12-16 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| WO2010077837A2 true WO2010077837A2 (fr) | 2010-07-08 |
| WO2010077837A3 WO2010077837A3 (fr) | 2010-10-14 |
Family
ID=42224697
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/US2009/067964 WO2010077837A2 (fr) | 2008-12-16 | 2009-12-15 | Planchettes contenant un pigment ou un colorant variable pour article sécurisé |
Country Status (1)
| Country | Link |
|---|---|
| WO (1) | WO2010077837A2 (fr) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2012049514A3 (fr) * | 2010-10-13 | 2012-07-05 | D.W. Spinks (Embossing) Limited | Motif de contrôle pour un papier de sécurité |
| WO2016063049A1 (fr) * | 2014-10-23 | 2016-04-28 | De La Rue International Limited | Améliorations apportées aux papiers et documents de sécurité |
| US11352750B2 (en) | 2017-09-22 | 2022-06-07 | Council Of Scientific & Industrial Research | Shaped objects for use in security applications |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109972447A (zh) * | 2017-12-27 | 2019-07-05 | Tcl集团股份有限公司 | 涂布纸及其制备方法 |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA570965A (fr) | 1959-02-17 | Dominion Rubber Company | Regeneration de mousse de latex de caoutchouc vulcanise | |
| US4183989A (en) | 1976-12-07 | 1980-01-15 | Portals Limited | Security papers |
| JP2001159094A (ja) | 1999-11-25 | 2001-06-12 | Toppan Printing Co Ltd | 偽造防止用紙およびそれを用いた有価証券 |
| WO2004040062A1 (fr) | 2002-11-01 | 2004-05-13 | De La Rue International Limited | Papiers de securite pourvus d'un revetement non reflechissant |
| WO2007041579A2 (fr) | 2005-10-03 | 2007-04-12 | Sun Chemical Corporation | Pigments de securite et procede de fabrication |
| WO2007144657A2 (fr) | 2006-06-15 | 2007-12-21 | D. W. Spinks (Embossing) Limited | Motifs de contrôle pour la protection contre la contrefaçon |
-
2009
- 2009-12-15 WO PCT/US2009/067964 patent/WO2010077837A2/fr active Application Filing
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA570965A (fr) | 1959-02-17 | Dominion Rubber Company | Regeneration de mousse de latex de caoutchouc vulcanise | |
| US4183989A (en) | 1976-12-07 | 1980-01-15 | Portals Limited | Security papers |
| US4183989B1 (fr) | 1976-12-07 | 1990-05-08 | Portals Ltd | |
| JP2001159094A (ja) | 1999-11-25 | 2001-06-12 | Toppan Printing Co Ltd | 偽造防止用紙およびそれを用いた有価証券 |
| WO2004040062A1 (fr) | 2002-11-01 | 2004-05-13 | De La Rue International Limited | Papiers de securite pourvus d'un revetement non reflechissant |
| WO2007041579A2 (fr) | 2005-10-03 | 2007-04-12 | Sun Chemical Corporation | Pigments de securite et procede de fabrication |
| WO2007144657A2 (fr) | 2006-06-15 | 2007-12-21 | D. W. Spinks (Embossing) Limited | Motifs de contrôle pour la protection contre la contrefaçon |
Non-Patent Citations (1)
| Title |
|---|
| R. H LEACH AND R. J. PIERCE,: "The Printing Ink Manual, 5th Ed,", UNKNOWN |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2012049514A3 (fr) * | 2010-10-13 | 2012-07-05 | D.W. Spinks (Embossing) Limited | Motif de contrôle pour un papier de sécurité |
| WO2016063049A1 (fr) * | 2014-10-23 | 2016-04-28 | De La Rue International Limited | Améliorations apportées aux papiers et documents de sécurité |
| US11352750B2 (en) | 2017-09-22 | 2022-06-07 | Council Of Scientific & Industrial Research | Shaped objects for use in security applications |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2010077837A3 (fr) | 2010-10-14 |
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