PROTECTIVE ELEMENT BASED ON LUMINESCENT MATERIAL Russian patent published in 2019 - IPC G07D7/00 

FIELD: protection of printed products.

SUBSTANCE: invention relates to the field of equipment associated with counterfeit protection of paper and plastic printing products. Protective luminescent element comprises two luminescent components located in different sections of the element luminescing in narrow spectral ranges with width (30–50) nm, the first one – with the central luminescence frequency in the red wavelength range from 630 nm to 660 nm and the second one – in the near infrared region of the spectrum in range from 670 nm to 900 nm. Protective element can be formed by paints containing nanocrystalline luminescent materials based on quantum dots. Proposed protective element can be visualized and identified by observing its luminescence through a band-pass light filter which absorbs radiation of the visible range, either visually or using communication devices such as smartphones or tablets.

EFFECT: disclosed luminescent element for counterfeit protection is intended for use in rapid inspection of protected printed products.

3 cl, 6 dwg