Optical properties of thermochromic liquid crystal printing inks (CROSBI ID 599259)
Prilog sa skupa u zborniku | izvorni znanstveni rad | međunarodna recenzija
Podaci o odgovornosti
Jakovljević, Maja ; Friškovec, Mojca ; Klanjšek Gunde, Marta ; Lozo, Branka
engleski
Optical properties of thermochromic liquid crystal printing inks
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.
Thermochromic liquid crystal inks; optical properties; iridescent colours; reflectance
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Podaci o prilogu
169-173.
2013.
objavljeno
Podaci o matičnoj publikaciji
Proceedings of the 5-th International Scientific Conference "Printing Future Days 2013"
Berlin: VWB - Verlag für Wissenschaft und Bildung
978-3-86135-624-0
Podaci o skupu
Printing Future Days
predavanje
10.09.2013-12.09.2013
Chemnitz, Njemačka