Naslov
Ultraviolet protection of thermochromic printings

Autori
Friškovec, Mojca ; Kulčar, Rahela ; Hauptman, Nina ; Klanjšek Gunde, Marta

Vrsta, podvrsta i kategorija rada
Radovi u zbornicima skupova, cjeloviti rad (in extenso), znanstveni

Izvornik
Proceedings of 5th International Symposium on Novelities in Graphics / - Ljubljana, 2010

Skup
5th International Symposium on Novelities in Graphics

Mjesto i datum
Ljubljana, Slovenija, 27.05.2010. - 29.05.2010

Vrsta sudjelovanja
Poster

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
thermochromics; lightfastness; spectral distribution of light; ultraviolet light; colour hysteresis

Sažetak
Light with larger photon energy has a detrimental effect on colour and appearance over longer periods of time. Conventional printing inks usually have an acceptable lightfastness, mainly because of the high stability of applied pigments. On the contrary, novel smart printing inks have more sophisticated pigments which, in most cases, are not crystalline and therefore have a low resistance to light and also to high temperatures and some chemicals, thus needing additional protection. Our work is based on protection of thermochromic printing inks against UV light. Such inks have microencapsulated thermochromic composite (leuco dye, developer, solvent). A theromochromic ink applied in different thickness was tested. A lacquer was applied over printed samples as a protective layer. The dynamic colour of protected theromochromic layers was compared with the properties of the corresponding unprotected samples.

Izvorni jezik
Engleski

Znanstvena područja
Grafička tehnologija

POVEZANOST RADA