Ocena kakovosti DTF odtisov na belem in črnem pletivu za podjetje DATA Com., d. o. o.

Zakošek Čakš, Mišela (avtor), Kert, Mateja (mentor)

V diplomskem delu je bila ocenjena kakovost odtisov na belem in črnem bombažnem pletivu, ki se uporablja za izdelavo T-majic. Odtise so izdelali v podjetju Data Com., d. o. o. z digitalnim kapljičnim tiskalnikom in uporabo tehnologije neposredno na film (angl. Direct to film, DTF). Namen raziskave je bil ovrednotiti kakovost odtisov z vidika barvnih obstojnosti in vpliv tiska na mehanske lastnosti pletiva ter na podlagi rezultatov sodelujočemu podjetju predpisati priporočila glede nege potiskanih izdelkov. V eksperimentalnem delu so bile barve odtisov spektrofotometrično ovrednotene z uporabo barvnega prostora CIELAB. Na potiskanih vzorcih so bili izvedeni preizkusi barvne obstojnosti pri mokrem in suhem drgnjenju, pranju, vročem likanju, umetni svetlobi ter kislem in alkalnem znoju. Vsa testiranja so bila izvedena v skladu z veljavnimi SIST EN ISO standardi. Preizkušancem je bila določena tudi ploščinska masa, upogibna togost, pretržna sila in raztezek ter sprememba videza po mehanski obrabi. Rezultati izvedenih meritev so pokazali vpliv osnovne barve pletiva na barvne koordinate in videz odtisov, odlično barvno obstojnost vseh barvnih odtisov na belem in črnem pletivu pri vseh izvedenih poskusih, do rahlega odstopanja pa je prišlo v primeru mokrega drgnjenja. Sam odtis je povečal ploščinsko maso in upogibno togost pletiva ter vplival na pretržno silo in raztezek. Najvišje vrednosti pretržne sile je imelo belo pletivo tako v smeri zančnih vrstic kot tudi stolpcev, prav tako je imelo belo pletivo najvišje vrednosti pri raztezku v smeri zančnih stolpcev, v smeri zančnih vrstic pa so bile vrednosti višje pri črnem pletivu. Potiskano pletivo je zdržalo do 10 000 ciklov drgnjenj na aparatu Matindale, predno so bile zaznane spremembe barve na potiskani površini, kar je desetkrat višja obstojnost kot jo je zdržalo nepotiskano pletivo, kjer so se pojavile vidne spremembe videza pletiva že po 1000 ciklih drgnjen. Dobljeni rezultati potrjujejo, da je bil tisk folije kot tudi njen prenos na belo in črno pletivo skrbno izveden in da so odtisi zelo kakovostni.

• Jezik: Slovenski jezik
• Ključne besede: DTF tisk, transferna predloga, transferni tisk, bombažno pletivo, barvne obstojnosti, mehanske lastnosti pletiva.
• Vrsta gradiva: Diplomsko delo/naloga
• Organizacija: NTF - Naravoslovnotehniška fakulteta
• Leto izida: 2026
• PID: 20.500.12556/RUL-187132
• Datum objave v RUL: 09.09.2026

Sekundarni jezik

• Jezik: Angleški jezik
• Naslov: Quality assesment of DTF prints on white and black knitwear for company DATA Com., d. o. o.

Izvleček

In the diploma thesis, the quality of prints on white and black cotton jersey fabric, used for manufacturing T-shirts, was assessed. The prints were produced at the company Data Com., d. o. o. using a digital inkjet printer and direct-to-film (DTF) technology. The aims of the research were to evaluate the quality of the prints in terms of colour fastness, to study the impact of printing on the mechanical properties of the knitwear, and to provide recommendations regarding the care of printed products, based on the obtained results, to the participating company. In the experimental part, the colours of the prints were evaluated spectrophotometrically using the CIELAB colour space. Tests of colour fastness to wet and dry rubbing, washing, hot ironing, artificial light, and acid and alkaline perspiration were carried out on the printed samples in accordance with the applicable SIST EN ISO standards. The mass per unit area, flexural rigidity, tensile strength and elongation, as well as changes in appearance following mechanical wear according to standardised test procedures, were determined for all unprinted and printed samples. The measurement results showed the influence of the fabric’s base colour on the colour coordinates and appearance of the prints, as well as excellent colour fastness of all coloured prints on white and black knitwear in all tests carried out; however, a slight deviation occurred in the case of wet rubbing. The print itself increased the mass per unit area and flexural rigidity of the knitwear and affected the tensile strength and elongation. The white printed knitwear exhibited the highest tensile strength values in both directions; it also had the highest elongation values in the stitch column direction, whilst in the stitch row direction the values were higher for the black printed knitwear. The printed knitwear resisted 10 000 rubbing cycles on the Martindale apparatus before essential colour changes were detected within printed areas, which is ten times higher resistance compared with unprinted knitwear, where visual changes of the knitwear already appeared at 1000 rubbing cycles. The results confirm that the printing of the film and its transfer onto the white and black knitted fabrics were carried out with great care and that the prints are of very high quality.

• Ključne besede: DTF printing, DTF transfer, transfer print, cotton fabric, color fastness, mechanical properties of knitwear.