SYSTEMS AND METHODS FOR CREATING VARIABLE OPTICAL EFFECTS ON MEDIA

Čestica pigmenta koja obuhvata:jezgro sa nosećom supstancom i najmanje jedan od fluorescentnog materijala ili od fosforescentnog materijala, pri čemu je jezgro u osnovi sferičnog oblika; omotač koji okružuje jezgro, pri čemu omotač obuhvata fotohromatski materijal koji ima prvu optičku osobinu u prvom izvoru svetlosti i drugu optičku osobinu u drugom izvoru svetlosti koji ima skup talasnih dužina nedovoljno prisutnih u prvom izvoru svetlosti, i gde druga optička osobina umanjuje emitovano zračenje od strane najmanje jednog od fluorescentnog materijala ili fosforescentnog materijala. Prijava sadrži još 10 patentnih zahteva. Methods and systems for creating optical effects in pigments, inks, and on media are described. There is in particular described a system or indicia for use as a security or identification feature comprising a combination of material that is capable of inducing a change of optical appearance of the system or indicia in response to exposure to ultraviolet (UV) light. The combination of materials includes at least a first material that changes its optical appearance under exposure to UV light and a second material that provides a color under ambient visible light or under exposure to UV light. The first and second materials are selected in such a way that exposure to UV light causes a visible spectrum of the system or indicia to dynamically shift over time from a first spectrum to a second spectrum distinct from the first spectrum