Opcije termokromnih tiskarskih boja različitih aktivacijskih temperatura

master's thesis

• Author: Julija Križanac
• Mentor: Branka Lozo (mentor)
• Committee member: Branka Lajić (član povjerenstva)
• Committee member: Branka Lozo (član povjerenstva)
• Committee member: Rahela Kulčar (član povjerenstva)
• Granter: University of Zagreb; Faculty of Graphic Arts; Zagreb
• Defense date and country: 2017-09-25, Croatia
• Scientific / art field, discipline and subdiscipline: TECHNICAL SCIENCES; Graphic Technology

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.

Abstract (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.

• Keywords: Termokromne tiskarske boje; temperatura aktivacije; reverzibilnost; miješanje tiskarskih boja
• Keywords (english): Thermochromic printing inks; activation temperature; reversibility; mixed printing inks
• Language: croatian
• URN:NBN: urn:nbn:hr:216:033961
• Study programme: Title: Graphic technology; specializations in: Graphic technology, Design of graphic products; Course: Graphic technology; Study programme type: university; Study level: graduate; Academic / professional title: sveučilišni/a magistar/magistra inženjer/inženjerka grafičke tehnologije (sveučilišni/a magistar/magistra inženjer/inženjerka grafičke tehnologije)
• Type of resource: Text
• File origin: Born digital
• Access conditions: Closed access
• Created on: 2024-04-18 21:47:53