US20140083473A1 - Use of photo catalytic material for self-cleaning banknotes - Google Patents

Use of photo catalytic material for self-cleaning banknotes Download PDF

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Publication number
US20140083473A1
US20140083473A1 US13/625,368 US201213625368A US2014083473A1 US 20140083473 A1 US20140083473 A1 US 20140083473A1 US 201213625368 A US201213625368 A US 201213625368A US 2014083473 A1 US2014083473 A1 US 2014083473A1
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US
United States
Prior art keywords
substrate
photo
catalytic
banknotes
cleaning
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.)
Abandoned
Application number
US13/625,368
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English (en)
Inventor
Nabil Lawandy
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
SPECTRA SYSTEMS Corp A DELAWARE CORPORATION
Spectra Systems Corp
Original Assignee
Spectra Systems Corp
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 Spectra Systems Corp filed Critical Spectra Systems Corp
Priority to US13/625,368 priority Critical patent/US20140083473A1/en
Assigned to SPECTRA SYSTEMS CORPORATION, A DELAWARE CORPORATION reassignment SPECTRA SYSTEMS CORPORATION, A DELAWARE CORPORATION ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: LAWANDY, NABIL M.
Priority to PCT/US2012/057963 priority patent/WO2014046692A1/en
Priority to MX2015003834A priority patent/MX381346B/es
Priority to CA2924846A priority patent/CA2924846C/en
Priority to BR112015006516A priority patent/BR112015006516A2/pt
Priority to EP12884922.1A priority patent/EP2897649B1/en
Priority to CN201280076571.2A priority patent/CN104755109B/zh
Priority to ES12884922T priority patent/ES2769807T3/es
Priority to EP19216689.0A priority patent/EP3656578A1/en
Priority to HK15109522.1A priority patent/HK1208828B/xx
Priority to CA2885685A priority patent/CA2885685C/en
Priority to CN201810511672.7A priority patent/CN108787630A/zh
Publication of US20140083473A1 publication Critical patent/US20140083473A1/en
Priority to US14/968,142 priority patent/US9839947B2/en
Abandoned legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B08—CLEANING
    • B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
    • B08B7/00—Cleaning by methods not provided for in a single other subclass or a single group in this subclass
    • B08B7/0035—Cleaning by methods not provided for in a single other subclass or a single group in this subclass by radiant energy, e.g. UV, laser, light beam or the like
    • B08B7/0057—Cleaning by methods not provided for in a single other subclass or a single group in this subclass by radiant energy, e.g. UV, laser, light beam or the like by ultraviolet radiation
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J21/00—Catalysts comprising the elements, oxides, or hydroxides of magnesium, boron, aluminium, carbon, silicon, titanium, zirconium, or hafnium
    • B01J21/06—Silicon, titanium, zirconium or hafnium; Oxides or hydroxides thereof
    • B01J21/063—Titanium; Oxides or hydroxides thereof
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J35/00—Catalysts, in general, characterised by their form or physical properties
    • B01J35/30—Catalysts, in general, characterised by their form or physical properties characterised by their physical properties
    • B01J35/39—Photocatalytic properties
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J35/00—Catalysts, in general, characterised by their form or physical properties
    • B01J35/40—Catalysts, in general, characterised by their form or physical properties characterised by dimensions, e.g. grain size
    • B01J35/45—Nanoparticles
    • B42D15/0013—
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B42—BOOKBINDING; ALBUMS; FILES; SPECIAL PRINTED MATTER
    • B42D—BOOKS; BOOK COVERS; LOOSE LEAVES; PRINTED MATTER CHARACTERISED BY IDENTIFICATION OR SECURITY FEATURES; PRINTED MATTER OF SPECIAL FORMAT OR STYLE NOT OTHERWISE PROVIDED FOR; DEVICES FOR USE THEREWITH AND NOT OTHERWISE PROVIDED FOR; MOVABLE-STRIP WRITING OR READING APPARATUS
    • B42D25/00—Information-bearing cards or sheet-like structures characterised by identification or security features; Manufacture thereof
    • B42D25/20—Information-bearing cards or sheet-like structures characterised by identification or security features; Manufacture thereof characterised by a particular use or purpose
    • B42D25/29—Securities; Bank notes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B42—BOOKBINDING; ALBUMS; FILES; SPECIAL PRINTED MATTER
    • B42D—BOOKS; BOOK COVERS; LOOSE LEAVES; PRINTED MATTER CHARACTERISED BY IDENTIFICATION OR SECURITY FEATURES; PRINTED MATTER OF SPECIAL FORMAT OR STYLE NOT OTHERWISE PROVIDED FOR; DEVICES FOR USE THEREWITH AND NOT OTHERWISE PROVIDED FOR; MOVABLE-STRIP WRITING OR READING APPARATUS
    • B42D25/00—Information-bearing cards or sheet-like structures characterised by identification or security features; Manufacture thereof
    • B42D25/30—Identification or security features, e.g. for preventing forgery
    • B42D25/36—Identification or security features, e.g. for preventing forgery comprising special materials
    • B42D25/378—Special inks
    • B42D25/387—Special inks absorbing or reflecting ultraviolet light
    • 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
    • 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
    • D21H21/36—Biocidal agents, e.g. fungicidal, bactericidal, insecticidal agents
    • 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
    • G06—COMPUTING OR CALCULATING; COUNTING
    • G06Q—INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES; SYSTEMS OR METHODS SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES, NOT OTHERWISE PROVIDED FOR
    • G06Q10/00—Administration; Management
    • G06Q10/08—Logistics, e.g. warehousing, loading or distribution; Inventory or stock management
    • G06Q10/087—Inventory or stock management, e.g. order filling, procurement or balancing against orders
    • G06Q10/0875—Itemisation or classification of parts, supplies or services, e.g. bill of materials
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B82—NANOTECHNOLOGY
    • B82Y—SPECIFIC USES OR APPLICATIONS OF NANOSTRUCTURES; MEASUREMENT OR ANALYSIS OF NANOSTRUCTURES; MANUFACTURE OR TREATMENT OF NANOSTRUCTURES
    • B82Y30/00—Nanotechnology for materials or surface science, e.g. nanocomposites
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S977/00—Nanotechnology
    • Y10S977/70—Nanostructure
    • Y10S977/773—Nanoparticle, i.e. structure having three dimensions of 100 nm or less
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S977/00—Nanotechnology
    • Y10S977/70—Nanostructure
    • Y10S977/811—Of specified metal oxide composition, e.g. conducting or semiconducting compositions such as ITO, ZnOx

Definitions

  • the present invention relates generally to substrate materials that include a self-cleaning feature. More specifically, the present invention relates to a substrate that includes a photo-catalytic material therein that, upon exposure to a source of illumination, reacts in a manner that causes the paper, or in general, the substrate material to shed accumulated contaminants and dirt. The process is also effective in disinfection of the banknotes.
  • High security documents such as banknotes are generally formed on substrate materials that are frequently equipped with security elements that are difficult to imitate and permit even a layman to check the authenticity of the print or the document.
  • security elements can be for example windowed security threads which are visible in certain areas on the surface of the paper of value, applied foils which have a transparent or metallized embossed hologram, blind embossings, so-called “latent images” produced by printing technology or by printing and embossing technology which render different information from different viewing angles, prints containing optically variable pigments and producing different color effects depending on the viewing angles, or prints comprising metallic effect ink which have metallic luster for example in a gold, silver or bronze tone.
  • Banknotes have a finite time in circulation due to soling and tearing of the notes in use by the public. Banknotes are handled in many ways during their usable life and experience a variety of mechanical stresses as well as coming into contact with substances that can dirty the notes, making them hard to authenticate and use.
  • haptic character of a bank note is manifested mainly by its feel and its flexural stiffness; it furthermore has a characteristic sound when being deformed and creased.
  • a dirt-repellent protective layer In order to improve durability of these substrates, it is known to provide papers of value with a dirt-repellent protective layer to extend the life time and fitness for circulation.
  • a protective layer typically contains cellulose ester or cellulose ether for the greater part and micronized wax for a lesser part and which is applied to the bank notes all over.
  • the micronized wax is dispersed by kneading or mixing with oil, an ink binder or a mixture thereof.
  • the sheets freshly printed with the protective layer can be stacked without difficulties without any black ink from one sheet staining the sheet therebelow
  • Another coating composition containing only a binder and no fillers is applied to the banknote paper, which has a large surface area or high surface roughness due to its porosity.
  • the composition is applied in a layer thickness such that a smooth surface and thus little possibility for dirt deposit results. Further, the coating is thin enough not to impair the other stated properties of the paper.
  • banknote sorters made by Geiseke and Devrient, De La Rue International and Toshiba typically process banknotes at rates of 10-40 banknotes/second and perform a number of diagnostics using sensors in the note path. Theses sensors are a combination of authentication sensors as well as note fitness sensors. The fitness sensors primarily use imaging and analysis of the images to determine if the banknote should be destroyed or returned into circulation.
  • the present invention provides for substrate materials that include a self-cleaning and directed cleaning capability. More specifically, the present invention provides a substrate that includes a photo-catalytic material therein that, upon exposure to a source of illumination, reacts in a manner that causes the substrate and printing inks materials, to shed accumulated contaminants and dirt and a system for sorting, cleaning and analyzing banknotes formed using such a substrate material.
  • the present invention employs coatings, inks and additives which are photo-active and catalytic to reactions which are effective in breaking up organic contaminants or dirt.
  • photo-excitation of these materials also leads to interfaces which are super-hydrophilic allowing for more water to be split, producing more reactive OH radicals by the photo-catalytic materials and in turn breaking more organic contaminant bonds for eventual removal of the adhered materials (oxidized sebum and other contaminants).
  • Such an effect desirably occurs through exposure to ambient light.
  • the self-cleaning materials incorporated in banknotes can be additionally utilized beyond ambient light exposure using equipment with optical/UV excitation and flowing air, water flow, and mechanical brushes, thus removing soiling and increasing the usable life of banknotes.
  • the invention is usable with all substrates and particularly polymeric substrates such as biaxially-oriented polypropylene (BOPP).
  • BOPP biaxially-oriented polypropylene
  • the invention further discloses a system which allows a certain class of fitness parameters to cause these banknotes to be redirected to a cleaning module, be reevaluated, and then either returned to circulation or destroyed.
  • inks which are photo-catalytic can be used for extending the life of the banknotes in printed regions.
  • FIG. 1 is a diagram of the present invention as applied to a banknote
  • FIG. 2 is a schematic diagram of system for cleaning and analyzing a banknote in accordance with the present invention.
  • FIG. 3 is an enlarged cross-section depicting the result of cleaning a banknote in accordance with the present invention.
  • the present invention provides a substrate or coating for a substrate that includes a photo-catalytic material therein when, upon exposure to a source of illumination, reacts in a manner that causes the substrate material to shed accumulated contaminants and dirt. Further, the present invention discloses a system for sorting, cleaning and analyzing banknotes that are formed using such a substrate material.
  • the present invention employs coatings, inks and/or additives that are photo-active.
  • the photo-active nature of these materials allows for the self-cleaning of substrates, such as for example banknotes, by ambient light exposure as well as the cleaning of processed banknotes using equipment with optical excitation, thus increasing their usable life.
  • the invention is usable with all substrates and particularly polymeric substrates such as biaxially-oriented polypropylene (BOPP).
  • BOPP biaxially-oriented polypropylene
  • semiconductor nanoparticles exhibit various photo-catalytic effects. Examples of these include III-V (GaN, GaAs) and II-VI (ZnS, ZnSe, CdS, CdSe, WS 2 , MoS 2 ) semiconductors and various metal oxides such as ZnO, TiO 2 , MoO 3 , CeO 2 , ZrO 2 , WO 3 , alpha-FeO 3 and SnO 2 .
  • TiO 2 titanium dioxide
  • DSSC Dye Sensitized Solar Cells
  • TiO 2 is highly photo-catalytic.
  • the most photo-reactive form is the anatase phase which can be obtained by high temperature conversion.
  • the anatase form of TiO 2 can be excited by ultraviolet energy having a wavelength in the 200 nm-400 nm region and more particularly in the 360 nm-390 nm region. This is advantageous in that light sources such as low cost LED flash lamps, arc sources and lasers are all available for excitation in this energy range and are thus anticipated for possible use within the scope of the present invention.
  • those metal oxides and semi-conductors listed above are equally applicable and intended to fall within the scope of the present invention as being suitable photo-catalytic materials within the scope of the present invention.
  • modified TiO 2 can be used which has different absorption, interfacial charge transfer and absorption characteristics.
  • Photo-catalytic degredation with illuminated TiO 2 of a large number of substrates including soot and carbonaceous contaminants is primarily ascribed to the strong oxidation potential of its valence band holes and surface OH radicals.
  • direct electron transfer from the conduction band to O 2 leads to degradation through O ⁇ 2 reactions.
  • excitation energy such as ambient lighting
  • electrons and holes can be generated and transferred to O 2 and OH respectively (1).
  • ultraviolet energy is directed onto the anatase titanium dioxide, more electrons and holes can be generated and transferred.
  • the present invention employs photo-catalytic semiconductor materials or photo-catalytic metal oxides as an additive to a banknote either as a coating, ink used for printing of the banknote or within the substrate itself.
  • the present invention employs anatase titanium dioxide as an additive to a banknote either as a coating, ink used for printing of the banknote or as the substrate itself. Since the reactions happen at the anatase titanium dioxide material, preferably positioned on the very surface of the banknote, they attack the lowest layers of the dirt, loosening encrusted dirt particles very effectively by chipping them away from the inside out. This is in clear contrast to normal cleaning, where the dirt is scrubbed from the outside in.
  • the invention further discloses a system at FIG. 2 for evaluating the status and fitness of a banknote in order to determine whether it should remain in circulation.
  • the system may be a standalone system or incorporated onto banknote counters and sorters.
  • the system employs a sensor to read various fitness data from the banknote. Based on the date the system makes a decision to either pass or clean the banknote.
  • a cleaning module applies energization light for to initiate the photo-catalytic process and removes the photo-catalytic reaction products using a wash, gas jet, or mechanical means.
  • a fitness sensor that either returns the note to circulation or sends the banknote to a destroyer device or reject sorter bin.

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  • Chemical & Material Sciences (AREA)
  • Business, Economics & Management (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Organic Chemistry (AREA)
  • Materials Engineering (AREA)
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  • Finance (AREA)
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  • Entrepreneurship & Innovation (AREA)
  • Pest Control & Pesticides (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Inspection Of Paper Currency And Valuable Securities (AREA)
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US13/625,368 2012-09-24 2012-09-24 Use of photo catalytic material for self-cleaning banknotes Abandoned US20140083473A1 (en)

Priority Applications (13)

Application Number Priority Date Filing Date Title
US13/625,368 US20140083473A1 (en) 2012-09-24 2012-09-24 Use of photo catalytic material for self-cleaning banknotes
CN201810511672.7A CN108787630A (zh) 2012-09-24 2012-09-28 用于自清洁钞票的光催化材料的使用
CN201280076571.2A CN104755109B (zh) 2012-09-24 2012-09-28 用于自清洁钞票的光催化材料的使用
EP19216689.0A EP3656578A1 (en) 2012-09-24 2012-09-28 Use of photo catalytic material for self cleaning banknotes
CA2924846A CA2924846C (en) 2012-09-24 2012-09-28 Use of photo-catalytic material for cleaning banknotes
BR112015006516A BR112015006516A2 (pt) 2012-09-24 2012-09-28 uso de material foto-catalítico para a auto-limpeza de cédulas
EP12884922.1A EP2897649B1 (en) 2012-09-24 2012-09-28 Use of photo catalytic material for self cleaning banknotes
PCT/US2012/057963 WO2014046692A1 (en) 2012-09-24 2012-09-28 Use of photo catalytic material for self cleaning banknotes
ES12884922T ES2769807T3 (es) 2012-09-24 2012-09-28 Uso de material fotocatalítico para billetes de banco autolimpiables
MX2015003834A MX381346B (es) 2012-09-24 2012-09-28 Uso de material fotocatalitico para autolimpieza de papel moneda.
HK15109522.1A HK1208828B (en) 2012-09-24 2012-09-28 Use of photo catalytic material for self cleaning banknotes
CA2885685A CA2885685C (en) 2012-09-24 2012-09-28 Use of photo-catalytic material for cleaning banknotes
US14/968,142 US9839947B2 (en) 2012-09-24 2015-12-14 System for cleaning photo catalytic banknotes

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US13/625,368 US20140083473A1 (en) 2012-09-24 2012-09-24 Use of photo catalytic material for self-cleaning banknotes

Related Child Applications (1)

Application Number Title Priority Date Filing Date
US14/968,142 Division US9839947B2 (en) 2012-09-24 2015-12-14 System for cleaning photo catalytic banknotes

Publications (1)

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US20140083473A1 true US20140083473A1 (en) 2014-03-27

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US13/625,368 Abandoned US20140083473A1 (en) 2012-09-24 2012-09-24 Use of photo catalytic material for self-cleaning banknotes
US14/968,142 Expired - Fee Related US9839947B2 (en) 2012-09-24 2015-12-14 System for cleaning photo catalytic banknotes

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Application Number Title Priority Date Filing Date
US14/968,142 Expired - Fee Related US9839947B2 (en) 2012-09-24 2015-12-14 System for cleaning photo catalytic banknotes

Country Status (8)

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US (2) US20140083473A1 (es)
EP (2) EP2897649B1 (es)
CN (2) CN108787630A (es)
BR (1) BR112015006516A2 (es)
CA (2) CA2885685C (es)
ES (1) ES2769807T3 (es)
MX (1) MX381346B (es)
WO (1) WO2014046692A1 (es)

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US10429641B2 (en) * 2017-05-31 2019-10-01 GM Global Technology Operations LLC Light-enhanced self-cleaning film system and method of forming same
US10533249B2 (en) 2017-05-18 2020-01-14 GM Global Technology Operations LLC Method of forming a self-cleaning film system
US10556231B2 (en) 2017-05-18 2020-02-11 GM Global Technology Operations LLC Self-cleaning film system and method of forming same
US10583428B2 (en) 2017-05-18 2020-03-10 GM Global Technology Operations LLC Self-cleaning film system and method of forming same
US10754067B2 (en) 2017-05-18 2020-08-25 GM Global Technology Operations LLC Textured self-cleaning film system and method of forming same
WO2021089464A1 (de) * 2019-11-06 2021-05-14 Bundesdruckerei Gmbh Sicherheitsdokument mit oberflächenbeschichtung auf basis von nanomaterialien
IT202100017894A1 (it) * 2021-07-07 2023-01-07 L & G Holding S R L Trattamento antibatterico ed antivirale per monete, banconote e gettoni

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CN106142890B (zh) * 2016-08-24 2018-02-27 中国人民银行印制科学技术研究所 气体调制发光防伪元件
EP4126558A1 (de) * 2020-04-03 2023-02-08 Giesecke+Devrient Currency Technology GmbH Wertdokumentsubstrat und verfahren zum desinfizieren
DE102020006601A1 (de) * 2020-10-27 2022-04-28 Giesecke+Devrient Currency Technology Gmbh Banknote mit antiviralem Schutzlack, Verfahren zur Herstellung einer Banknote mit antiviralem Schutzlack und Verwendung einer Banknote mit antiviralem Schutzlack als antiviralen Gegenstand
US11883547B2 (en) 2020-12-09 2024-01-30 Russell Hamilton Paper money sanitation apparatus

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CA2885685C (en) 2017-09-12
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