Naslov
Dynamic colour and appearance of thermochromic offset inks

Autori
Kulčar, Rahela ; Panak, Ondrej ; Otahalova, Lenka ; Friškovec, Mojca ; Kaplanova, Marie ; Klanjšek Gunde, Marta

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

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

Skup
5th International Symposium on Novelties in Graphics

Mjesto i datum
Ljubljana, Slovenija, 27.05.2010. - 29.05.2010

Vrsta sudjelovanja
Poster

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
thermochromic ink; colorimetry; hysteresis; gloss; roughness

Sažetak
The application properties of offset-printable air-drying thermochromic inks in red, black and magenta colours were analysed. They have an activation temperature of 31C, according to the producer data. In similar-sized microcapsules the thermochromic composite is protected from the environment. Up to 2, 5 µm large particles make the surface of thin-printed layer very uneven which considerably reduces specular gloss. It increases with layer thickness to steady value where a colour saturation also occur. The surface appearance is influenced additionally by the applied paper. The dynamic colour of samples was evaluated by several parameters suitable to describe the colour hysteresis loops. Very similar results were obtained for the red and magenta samples and somewhat different for the black ones. The decolourization process occurs in the black sample at higher temperatures and is confined to narrower temperature range, comparing to the other two samples. The other properties of colour hysteresis are practically the same.

Izvorni jezik
Engleski

Znanstvena područja
Grafička tehnologija

POVEZANOST RADA