Naslov
Optical properties of thermochromic liquid crystal printing inks

Autori
Jakovljević, Maja ; Friškovec, Mojca ; Klanjšek Gunde, Marta ; Lozo, Branka

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

Izvornik
Proceedings of the 5-th International Scientific Conference "Printing Future Days 2013" / - Berlin : VWB - Verlag für Wissenschaft und Bildung, 2013, 169-173

ISBN
978-3-86135-624-0

Skup
Printing Future Days

Mjesto i datum
Chemnitz, Njemačka, 10.09.2013. - 12.09.2013

Vrsta sudjelovanja
Predavanje

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
Thermochromic liquid crystal inks; optical properties; iridescent colours; reflectance

Sažetak
Thermochromic liquid crystal inks (TLCs) reflect incident light in a rather narrow spectral region. This phenomenon is caused by selective reflection of light on chiral (twisted) molecular structure which changes its distribution with temperature. The reflected light produces iridescent colour which is continuously shifted from red to blue part of the spectrum with temperature, the effect which is known as „colour play“. This research is focused on the optical properties of a water-based TLC ink. The ink was screen-printed over black and white matte uncoated paper. The temperature dependent iridescent colours are seen very clearly when the ink is printed over black background, while on the white substrate is hardly visible. The observed effects were quantified by spectral reflectances applying (45°:0°) and (8°:di) geometries in the 400-700 and 200-1500 nm spectral regions, respectively. The measured temperature dependent iridescent colours were analyzed.

Izvorni jezik
Engleski

Znanstvena područja
Grafička tehnologija

POVEZANOST RADA