FIELD: physics.
SUBSTANCE: protective element is proposed comprising luminescent regions forming latent colour images visible when irradiated by exciting radiation of UV-band, made with inks containing nanocrystalline materials based on quantum dots. One part of the image is characterized by the spectral composition of the radiation consisting of one narrow-band line, and the other part of the image is characterized by the spectral composition of the radiation consisting of at least two narrow-band lines. The luminescent colours of the mentioned images are identical when viewed with the naked eye, but are different when viewed through the narrow band colour filters that ensure the selection of the spectral composition of the luminescent radiation. The stated task is also solved by the polygraphic product which comprises a protective element characterized above.
EFFECT: creation of a reliable protective element, the authenticity of which can be verified visually with the help of simple technical means.
5 cl, 2 dwg
| Title | Year | Author | Number |
|---|---|---|---|
| PROTECTIVE ELEMENT BASED ON LUMINESCENT MATERIAL | 2019 |
|
RU2703795C1 |
| SECURITY ELEMENT FOR IDENTIFICATION OF ARTICLES | 2013 |
|
RU2533209C1 |
| METHOD OF MARKING ANTI-COUNTERFEIT OBJECT, METHOD OF IDENTIFYING MARKING AND MARKING IDENTIFICATION DEVICE | 2019 |
|
RU2720464C1 |
| MARKING COMPOSITION AND METHOD OF MARKING AND IDENTIFYING VALUABLE DOCUMENT | 2014 |
|
RU2581882C1 |
| COMPOSITE LUMINESCENT MATERIAL, METHOD OF PRODUCTION THEREOF (EMBODIMENTS) AND DATA MEDIUM | 2023 |
|
RU2821639C1 |
| FIBROUS POLYMER FOR PAPER PROTECTION AGAINST COUNTERFEIT, METHOD OF ITS PRODUCTION, PAPER PROTECTED AGAINST COUNTERFEIT INCLUDING SAID MATERIAL AND ARTICLE (IMPORTANT DOCUMENT) | 2014 |
|
RU2568707C1 |
| VALUABLE DOCUMENT WITH COUNTERFEIT PROTECTION, METHOD FOR VERIFICATION OF VALUABLE DOCUMENT AUTHENTICITY AND DEVICE FOR VERIFICATION OF COUNTERFEIT-PROTECTED VALUABLE DOCUMENT AUTHENTICITY | 2008 |
|
RU2379192C1 |
| COMPOSITION FOR CONTROLLING AUTHENTICITY OF DATA MEDIUM (EMBODIMENTS) | 2020 |
|
RU2766111C1 |
| METHOD OF CREATING HIDDEN LUMINESCENT LABELS | 2012 |
|
RU2530238C2 |
| LUMINESCENT PAINT COLOURLESS IN DAYLIGHT FOR ART WORK | 2010 |
|
RU2429263C1 |
