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KERSEN LEAF EXTRACT (Muntingia Calabura L.) FOR YARN DYEING APPLICATIONS IN LOMBOK-INDONESIAN WEAVING ARTISANS
(Technical University of Liberec, ) Fathurrahman, Moh.; Rohidi, Tjetjep Rohendi; Wadiyo; Syakir; Technická univerzita v Liberci
This study aims to analyze the process of making natural dye extracts from Kersen leaves (Muntingia calabura L.) and the results of dyeing weaving yarn in weaving artisans in Lombok, Indonesia. This natural dye is expected to be an environmentally friendly alternative dye that uniquely enriches local cultural heritage. The cloth that has been dyed with kersen leaf extract is then fixed with three types of fixators, namely: alum solution (Al₂(SO₄)₃K₂SO₄24H₂O), lime solution (Ca(OH)₂), and ferrous sulfate solution (FeSO₄·7H₂O). The results of the study showed: 1) The technique of making natural dye extracts from kersen leaves carried out by the researcher through the extraction technique of materials with a composition of 200 grams of kersen leaves: 1,000 ml of water into 500 mL of extract solution while what the weavers did was 15 kg of kersen leaves: 30 litres of water into 15 litres of material solution that is ready to be used to dye woven yarn; 2) The use of fixators in addition to directing colors also locks the color on the dyed yarn so that it does not fade easily; the alum solution fixator produces brighter colors; the lime solution fixator produces colors that tend to brown; and the ferrous sulfate ban produces a darker color towards black. This finding recommends the use of kersen leaf extract as an alternative solution for environmentally friendly natural dyes to be used in yarn dyeing in the weaving industry.
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EFFECTS OF LIGHT SOURCES ON ILLUMINANCE DIFFERENCE AND COLOR DIFFERENCE FOR DYED FABRICS
(Technical University of Liberec, ) Nguyen, Tuan Anh; Nguyen, Thi Thuy; Doan, Thi Xuan; Tran, Thi Kieu Oanh; Technická univerzita v Liberci
Under various light sources, the color of dyed fabrics could be observed in different ways. In this study, the red (R), green (G) and blue (B) dyed fabrics were evaluated through color difference (ΔE) and illuminance difference (ΔI) under daylight (D65), fluorescence (F, TL84, CWF), and ultraviolet (UV) lights. It was found that when D65, a standard daylight illuminant, is used as the reference, ΔE value under TL84 and CWF light sources was not significantly different. Therefore, D65 can be complemented by TL84 and CWF for color evaluation to enhance accuracy. The study also highlighted that using a 45-degree viewing angle yielded the most objective color evaluation results. This angle provides optimal conditions for observing light reflection, contributing to more reliable color evaluation. Additionally, dye concentration had a significant impact on color evaluation. An incorrect dye concentration can alter the ability of fabric to absorb light, leading to inaccurate evaluations. Furthermore, washing cycles also affect the colorfastness of dyed fabrics, with increased washing leading to a brighter appearance and higher light reflection.
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EMERGING TRENDS IN THE USE OF IMMERSIVE TECHNOLOGIES FOR GARMENT DESIGN
(Technical University of Liberec, ) Valencia, Jackeline; Cardona-Acevedo, Sebastián; Valencia-Arias, Alejandro; Jimenez García, Jesus Alberto; Cumpa Vásquez, Jorge Tomás; Agudelo-Ceballos, Erica; Bermeo-Giraldo, Maria Camila; Muñoz Muñoz, Carlos Andrés; Technická univerzita v Liberci
This study examines the applications of immersive technologies, such as virtual reality (VR) and augmented reality (AR), in apparel design. The aim is to identify current trends, advancements, gaps and opportunities for future research. A review of the literature has identified that these technologies enable designers to create digital prototypes, optimise creative processes and reduce material waste, thereby contributing to greater sustainability and efficiency in the fashion industry. However, research in this field demonstrates considerable fragmentation, which presents a challenge in integrating these advances into a coherent conceptual framework. While the adoption of AR and VR has grown, the implementation of advanced technologies such as artificial intelligence and machine learning remains limited. Furthermore, although sustainability is a relevant topic, it has not been sufficiently analysed in terms of its social and environmental impact. This study highlights the need for a more integrated approach and government support to encourage the ethical and responsible adoption of these technologies.
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Make ads skippable or not: The impact of ad type on brand recall, salience and conversion rate
(2025-04-15) Bauerova, Radka; Koprivova, Veronika
In today’s world, people are using digital platforms more than ever to communicate with friends, network, shop, learn and more. The average time spent on these platforms is increasing. Companies are naturally reflecting this fact in order to reach as many people as possible through these platforms and their advertising messages. However, users are constantly bombarded with advertising messages that fragment their attention. It is, therefore, important to study the effects of different types of video advertising, with or without skipping, on consumers’ purchasing decisions and to create ads that perform better but do not distract the audience. Therefore, the aim of this paper is to investigate the effect of skipping ads in terms of brand memorability and brand salience on subsequent conversion performance in an e-commerce store. The results of the study show that consumers achieve lower brand recall and conversion rates when shown a non-skippable ad than a skippable ad. On the other hand, while skippable ads are associated with higher levels of actual brand recall, from a more holistic perspective, the non-skippable ad type is better suited to increase brand salience, which appears to be more important for subsequent future purchase execution at the retailer.
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CUTTING ROOM SOFTWARE: ENHANCING EFFICIENCY IN GARMENT PRODUCTION
(Technical University of Liberec, ) Arsoy, Raşit; Technická univerzita v Liberci
The rapid growth of the ready-to-wear industry has created a need for continuous improvement, along with the necessity to shorten production times and increase quality. The processes in this industry comprise a series of sequential activities carried out by machines and workers in a specific order. Particularly before cutting, checking model information is critically important. However, the various document formats used in the industry and the software employed to manage this data can complicate the work for personnel. In this context, there is a need for user-friendly software to enhance operational efficiency and minimize errors. This research aims to develop software focused on cutting processes. The developed software allows users to quickly and effectively access model and fabric information, measurement charts, and warehouse data, while simplifying complex processes. Additionally, its simple interface enables use without the need for special training and allows for the remote management of processes. As a result, the software aims to increase operational efficiency while reducing errors and workload.