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Octovec (lat. Rhus typhina) je tujerodna invazivna rastlinska vrsta, ki izhaja iz Severne Amerike, prekomerno pa je razširjena pri nas. V diplomski nalogi smo raziskali uporabnost pridobljenega izvlečka barvila iz plodov octovca, ekstrahiranega v različnih topilih, v grafičnem in tekstilnem tisku. Osredotočili smo se na pripravo tiskarske barve z različnimi koncentracijami barvila in možne pozitivne ali negativne učinke različnih dodatkov k tiskarski barvi. Tiskali smo na komercialen bel papir in na papirja, pridelana iz stebel japonskega dresnika in zlate rozge ter na bombažno, poliestrno in volneno tkanino. Vsi odtisi so bili barvnometrično ovrednoteni. Barve odtisov so variirale med marelično rumeno oziroma bež do marelično rožnatih oziroma bolj rdečkastih odtenkov. S tiskarsko barvo z dodatkom bakrovega sulfata smo dobili sivozelene odtise. Vsem odtisom so bile testirane obstojnosti na drgnjenje in svetlobo. Odtisom na tkaninah so bile preizkušane tudi obstojnosti na pranje in mokro likanje. Obstojnosti odtisov na svetlobo so bile slabe. Dodatek taninske kisline v tiskarski barvi je dal temnejše odtise in je izboljšal obstojnosti na svetlobo. Obstojnost vseh odtisov na drgnjenje je bila odlična. Dodatek natrijevega karbonata v tiskarski barvi je zmanjšal obstojnost odtisov na poliestrni tkanini na drgnjenje. Obstojnosti odtisov na tkaninah na mokro likanje so bile odlične. Pralne obstojnosti odtisov na tkaninah so bile zelo slabe barva sicer pri nobenem vzorcu ni prešla na spremljevalno belo tkanino, a je pri vseh vzorcih prišlo do razbarvanja potiskane tkanine. Najslabšo obstojnost na pranje so imeli odtisi na volni, najboljše pralne obstojnosti pa so dosegli odtisi na kationsko predobdelani bombažni tkanini. Staghorn sumac (lat. Rhus typhina) is an invasive alien plant that originates from Northern America and is excessively widespread in our country. In the diploma thesis, we investigated the applicability of the obtained dye extract from staghorn sumac fruit, extracted in various solvents, in graphic and textile printing. We focused on printing ink preparation using different concentrations of extracted dye, and the possible positive or negative effects of different additives to the printing ink. For printing, the commercial white paper and papers made from the stems of Japanese knotweed and goldenrod, as well as cotton, polyester and woollen fabrics were used. All prints were colorimetrically evaluated. The colours of the prints varied from apricot yellow or beige to apricot pink or more reddish shades. Grey-green prints were obtained with the addition of copper sulphate in the ink. All prints were tested for rubbing and light fastness properties, and on fabrics, as well as for laundering and wet hot pressing. The fastness of the prints on the light was poor. The addition of tannic acid in the printing ink gave darker prints and improved resistance to light. The rubbing fastness of all prints was excellent. The addition of sodium carbonate in the printing ink reduced the abrasion resistance of the prints on polyester fabric. The durability of the prints on fabrics to the wet ironing was excellent. The washing fastness of the prints on the fabrics was very poor the prints on fabrics were discoloured, however, there was no transfer of printing ink to the accompanying white fabric. The prints on wool had the worst resistance to washing, while the prints on cationically pre-treated cotton fabric achieved the best washing fastness. |
