20.500.12556/RUL-121687 Optimiziranje obstojnosti barvnih odtisov na osnovi invazivnih rastlin Optimizing resistance of color print based on invasive plants Za uporabo določenega izdelka je ključnega pomena obstojnost odtisa na zunanje dejavnike. Dandanes se čedalje bolj uporabljajo naravni pigmenti, saj so bistveno bolj ekološko primerni kakor sintetični pigmenti. V okviru magistrskega dela so bile pripravljene tiskarske barve na osnovi ekstraktov izbrane invazivne rastline in izdelani odtisi na različnih tiskovnih materialih. Za tiskovni material so bile uporabljene tri vrste papirja, in sicer pisarniški papir, recikliran papir ter papir iz japonskega dresnika. Pri pripravi tiskarske barve je bil uporabljen dodatek anorganskega belega pigmenta (TiO2). Namen uporabe anorganskega belega pigmenta je bil oceniti in preučiti možnost izboljšanja barvnih odtisov. Glavni cilj magistrskega dela je preučiti obstojnost izdelanih barvnih odtisov na zunanje dejavnike (drgnjenje, svetloba). Osnovne, površinske ter optične lastnosti posameznih vrst papirjev so bile določene z uporabo standardnih metod. Na posameznih vzorcih z oznakami V1 – V8 so bile optimizirane obstojnosti odtisov. Barvne vrednosti ter obstojnost odtisov na drgnjenje ter svetlobo so bile izmerjene z uporabo spektrofotometra in so predstavljene v eksperimentalnem delu. Pri zajetih posnetkih z uporabo vrstičnega elektronskega mikroskopa (SEM) na vzorcih V4, V5 in V6 ni bilo opaznih izrazitih sprememb. Rezultati kažejo, da dodatek anorganskega belega pigmenta ne vpliva na mehansko obstojnost odtisa. Žal pa pri izboljšanju obstojnosti odtisa temu ni tako. Dodatek titanovega dioksida je poslabšal obstojnosti odtisov, saj so bile pridobljene barvne razlike ?E*ab previsoke. The persistence of the footprint to external factors is crucial for the use of a particular product. Nowadays, natural pigments are increasingly used, as they are significantly more environmentally friendly than synthetic pigments. As part of the master's thesis, printing inks based on extracts of selected invasive plants were prepared and prints were made on various printed materials. Three types of paper were used for the printing material, namely: office paper, recycled paper and Japanese knotweed paper. The addition of inorganic white pigment (TiO2) was used in the preparation of the printing ink. The purpose of using the inorganic white pigment was to evaluate and study the possibility of improving color prints. The main goal of the master's thesis is to study the durability of manufactured color prints on external factors (rubbing, light). The basic, surface and optical properties of individual types of paper were determined using standard methods. Imprint stability was optimized on individual samples marked V1 - V8. Color values and the resistance of prints to abrasion and light were measured using a spectrophotometer, which are presented in the experimental part. No significant changes were observed in the captured images using a scanning electron microscope (SEM) on samples V4, V5 and V6. Based on the results, it can be confirmed that the addition of inorganic white pigment does not affect the mechanical stability of the impression. Unfortunately, this is not the case when improving the durability of the footprint. The addition of titanium dioxide deteriorated the durability of the prints, because the value of the color differences ΔE*ab were too high. japonski dresnik tisk tiskarska barva barvna obstojnost titanov dioksid Japanese knotweed printing printing ink colour fastness titanium dioxid true false false Slovenski jezik Angleški jezik Magistrsko delo/naloga 2020-10-22 14:02:56 2020-10-22 14:03:03 2022-09-02 04:00:28 0000-00-00 00:00:00 2020 0 0 0000-00-00 NiDoloceno NiDoloceno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 1970-01-01 76606 6000.pdf 6000.pdf 1 4F4004D120F6E8837467C6F87141AFAB 1944e613e18407398a0b63dc20256f2b052445fae0ba415935322a7a478c80f4 f32be814-a1ba-11eb-a523-00155dcfd717 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=136682 Naravoslovnotehniška fakulteta 0 0 0