20.500.12556/RUL-158630 Ekstrakcija in uporaba naravnega barvila iz cvetov pelargonije Extraction and application of natural dye from pelargonium flowers Namen diplomskega dela je bil pridobiti naravno barvilo iz rdečih cvetov pelargonije, ki smo jo vzgojili sami, in ga preizkusiti za tisk in barvanje. Za ekstrakcijo barvila iz cvetov pelargonije smo uporabili različna topila, med katerimi so bila etanol, metanol, diklorometan in voda. Z ekstrakti cvetov v različnih topilih smo pripravili sitotiskarske barve in tiskali na različne vrste papirja in tkanin. Odtise smo barvnometrično ovrednotili ter preizkušali njihove obstojnosti. Na barvo ekstraktov, tiskarskih barv in odtisov je vplivalo uporabljeno topilo – tako smo dobili vijolične, bordo, rjave in rjavkasto rumene odtise, ki so bili bolj intenzivni na tkaninah kot na papirju. Odtisi so imeli v povprečju srednje obstojnosti na svetlobo, odlične obstojnosti na suho drgnjenje in slabše obstojnosti na mokro drgnjenje in pranje. Poleg tiskanja smo bombažno in volneno tkanino tudi barvali v vodnem izvlečku cvetnih listov, kjer smo isto kopel uporabili štirikrat in dobili rjava in rumenkasto rjava obarvanja. Svetlobne obstojnosti obarvanj so bile dobre po prvem barvanju, ko je bila na tkaninah tudi največja globina barve. Obarvanja so imela odlične obstojnosti na suho drgnjenje, slabše na mokro drgnjenje, dobre obstojnosti na mokro likanje in srednje obstojnosti na pranje. The aim of the thesis was to obtain a natural dye from red flowers of pelargoniums, which we grew ourselves, and test it for printing and dyeing. Different solvents were used to extract the dye from the geranium flowers, including ethanol, methanol, dichloromethane and water. The extracts of the flowers in different solvents were used to prepare screen printing inks and printed on different types of paper and fabrics. The prints were evaluated colorimetrically and tested for durability. The colour of the extracts, inks and prints was influenced by the solvent used, resulting in purple, burgundy, brown and brownish yellow prints, which were more intense on fabrics than on paper. The prints had on average moderate light fastness, excellent dry rub fastness and poorer wet rub and wash fastness. In addition to printing, the cotton and wool fabrics were also dyed in aqueous petal extract, where the same bath was used four times, producing brown and yellowish-brown dyeings. The light fastness of the dyes was good after the first dyeing, when the fabrics also showed the greatest depth of colour. The dyes had excellent dry rub fastness, poorer wet rub fastness, good wet iron fastness and medium wash fastness. pelargonija naravna barvila ekstrakcija tiskarska barva tiskanje barvanje Pelargoniums natural dyes printing ink extraction printing dyeing true false false Slovenski jezik Angleški jezik Diplomsko delo/naloga 2024-06-18 09:00:38 2024-06-18 09:00:41 2024-07-02 03:34:27 0000-00-00 00:00:00 2024 0 0 0000-00-00 NiDoloceno NiDoloceno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 1970-01-01 98347 20515.pdf 20515.pdf 1 9240182CADFCF698E1C48DE37CD6513E a0b66270ea6beb543ddc22bcad2f879fe10de55c8a261e79261a841d7c8dad18 79ed9442-2d40-11ef-88cb-0050569b8976 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=186320 Naravoslovnotehniška fakulteta 0 0 0