FIELD: printing industry.
SUBSTANCE: printed product with rainbow holographic images is characterized by the fact that it contains a protective layer of xerogel of nanocrystalline titanium dioxide, optically transparent in the visible range of the spectrum, with a refractive index of not less than 1.8, located on rainbow holographic images.
EFFECT: simplification of the technology of manufacturing printed products with protected iridescent holographic images and production of non-fading sunlight and UV-radiation of specified printed products.
15 cl, 9 dwg
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