FIELD: printing industry.
SUBSTANCE: invention relates to methods to protect documents made on paper, cardboard, etc. with application of dyes, ink, etc. by means of application of texts, symbols, codes, manually or with the help of any printing device, onto their surface. Method is based on adding nanoparticles of ferromagnetic material or ferromagnetic material mixture with previously specified magnetic resonant properties. At the same time the document authenticity is verified at EPR spectrometre by comparison of magnetic resonance curve type of separate symbols or other document fragments with reference dye curve, which is produced at the moment of its manufacturing.
EFFECT: increased extent of documents counterfeit protection, at the same time authenticity check is carried out using complex measurement procedure and is characterised by high security.
1 dwg, 1 tbl
| Title | Year | Author | Number |
|---|---|---|---|
| METHOD OF DISTINGUISHING DOCUMENTS MADE USING ELECTROPHOTOGRAPHIC PRINTING WITH MAGNETIC TONER | 2008 |
|
RU2386126C1 |
| METHOD FOR PRODUCT AUTHENTICITY CONTROL | 2020 |
|
RU2753154C1 |
| TOOL FOR PROTECTION OF SECURITIES AND DOCUMENTS AGAINST FAKING | 1999 |
|
RU2150749C1 |
| METHOD FOR DETERMINING AGE OF PRINTED TEXTS ON PAPER USING RAMAN SPECTROSCOPY | 2023 |
|
RU2808949C1 |
| METHOD FOR DETECTION OF DIFFERENTIAL CRITERIA IN DOCUMENTS PRODUCED BY METHODS OF ELECTROPHOTOGRAPHIC PRINTING BY MAGNETIC TONERS | 2008 |
|
RU2386121C1 |
| METHOD OF PROTECTION AGAINST COUNTERFEITING OF VALUABLE PRODUCTS AND CONTROL OF THEIR AUTHENTICITY | 2022 |
|
RU2807430C1 |
| METHOD OF PROTECTING FROM FORGERY AND CHECKING AUTHENTICITY OF VALUABLE ARTICLES | 2006 |
|
RU2386174C2 |
| PROTECTIVE TONER AND ITS APPLICATION METHOD | 2019 |
|
RU2775238C2 |
| METHOD OF IDENTIFYING DOCUMENTS MADE USING ELECTROPHOTOGRAPHIC PRINTING TECHNIQUES WITH MAGNETIC TONER | 2008 |
|
RU2394233C1 |
| SYSTEM FOR CONTROLLING AUTHENTICITY OF DETECTED PRODUCT WITH RESONANCE PROTECTIVE MEANS | 2005 |
|
RU2293372C1 |
