Opcije termokromnih tiskarskih boja različitih aktivacijskih temperatura

Križanac, Julija (2017) Opcije termokromnih tiskarskih boja različitih aktivacijskih temperatura. Master's thesis - Graduate Programme. Grafički fakultet. [Mentor: Lozo, Branka].

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Abstract

Cilj ovog rada bio je odrediti karakteristike dviju UV sitotiskarskih termokromnih boja na bazi leukobojila.Ove dvije termokromne boje su meĎusobno pomiješane u različitim omjerima kako bi se dobile nove boje i ispitale njihove karakteristike. Korištene termokromne boje su reverzibilne, što znači da se pri odreĎenim temperaturama dogaĎaju promjene u obojenju. Tijekom ispitivanja promjene u boji termokromnih uzoraka izvršena su mjerenja u temperaturnim ciklusima ovisno o TA svake termokromne boje. Pomoću krivulja spektralnih refleksija prikazane su promjene kod pojedinih boja na različitim uzorcima. Kolorimetrijski parametri izračunati su iz vrijednosti izmjerenih spektralnih refleksija korištenjem CIELAB prostora boja, pod standardnom D50, CIE vrstom svjetlosti uz 2° standardni promatrač. Glavni cilj je bio ispitati dinamiku promjene boja te ustanoviti na koje će sve parametre miješanje ovih boja utjecati. Za ispitivanje uzoraka korišten je spektrofotometarOcean Optics USB 2000+ te računalni program SpectraSuite.

Item Type:	Master's thesis - Graduate Programme
Mentor name:	Lozo, Branka
Thesis Committee:	Dragčević, Krešimir and Lozo, Branka and Kulčar, Rahela
Defence date:	25 September 2017
Abstract in english:	The aim of this study was to determine characteristics of two UV thermochromic screen printing leuco dye-based inks. These two thermochromic printing inks of various activation temperatures have beenmixed together in different ratios to obtain new colors and examine their characteristics. Thermocromic inks, which were analyzed, are reversible. It means that color changes occur at certain temperatures. During the color change testing of thermochromic samples, measurements were carried out in temperature cycles, depending on the activation temperature of each thermochromic ink. Spectral reflection curves showed changes in individual inks on different samples. The colorimetric parameters were calculated from the value of measured spectral reflections using CIELAB colorspace, under standard D50, CIE light type with 2° standard observer. The main aim was to examine the dynamics of the color change and determine which parameters will be affected by the mixing of these colors. For sample testing, The Ocean Optics USB 2000+ spectrophotometer and Spectra Suite computer program were used.
Uncontrolled Keywords:	Termokromne tiskarske boje, temperatura aktivacije, reverzibilnost, miješanje tiskarskih boja
Keywords in english:	Thermochromic printing inks, activation temperature, reversibility,mixed printing inks
Subjects:	TECHNICAL SCIENCES > Graphic Technology
Institution:	Grafički fakultet
City:	Zagreb
Number of Pages:	54
Callnumber:	LOZ 2017 KRI
Inventory number:	DB643
Depositing User:	Nina Jelača
Status:	Unpublished
Date Deposited:	05 Dec 2017 10:20
Last Modified:	05 Dec 2017 10:20
URI:	http://eprints.grf.unizg.hr/id/eprint/2771

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