Rok 2023
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- ItemDESIGN AND INVESTIGATION THE OPERATION OF TEXTILE BASED ELECTRODES FOR ELECTROTHERAPY(Technical University of Liberec, ) AGHADAVOOD, ROYA; SHAHBAZ, ZAHRA; KHEIRI, TAHEREH; SHANBEH, MOHSEN; MARTINEK, RADEK; Technická univerzita v LiberciElectrostimulation is a way of treatment various nerve and muscle injuries as well as acute and chronic pain conditions. The electrotherapy which is increasingly used in physiotherapy, muscle is exposed to an electrical pulse in order to activate excitable tissue using external electrodes with the aim of building muscle strength, enhancement healing, improvement in patient’s mobility or reducing painTextile based electrodes are significantly noticed in the aspects of being flexible and re-usable and no needs of hydrogels, thereby avoiding skin irritation and allergic reactions and enhancing user comfort. This article presents a kind of textile based electrodes made of conductive yarns containing stainless steel/plyester blend fiber. The embroidery technique was used to prepare the textile based electrodes.Samples were examined on 10 people with pain in their bodies in a hospital without being moisturised. The purpose of this study is to asses the performance of 3 different textile based electrodes, considering the conductivity of the yarns which have been used to produce textile based electrodes, the usfulness of them for electrotherapy and comparing them with rubber electrodes commonly are used in clinics regularly.
- ItemSTUDY THE SELF-CLEANING ABILITY OF ZNO CONTAINED COTTON FABRICS(Technical University of Liberec, ) PHAN, DUY-NAM; THI THAN THUONG, VU; NGUYEN NHAT, TRINH; NGUYEN MINH, TUAN; CAO HONG, HA; MINH THANG, LE; Technická univerzita v LiberciIn this study, ZnO nanoparticles were successfully synthesized by the precipitation method, then immobilized onto cotton fabric. The metal oxide nanoparticle-contained fabric exhibits a self-cleaning effect under ultraviolet (UV) illumination. The nanostructure of the prepared samples was detected using Scanning Electron Microscopy (SEM) analysis. The chemical composition changes of the fabrics before and after the modification were detected using The Fourier transform infrared (FT-IR) and Energy Dispersive X-ray Spectroscopy (EDS). After modification with ZnO nanoparticles, the cotton fabric exerted adsorption and decomposition properties again various chemical compounds. Stains of methylene blue (MB), and methylene orange (MO) were introduced into cotton fabric, under UV light, the dyes were faded and ultimately discolored. The degradation of pigments in the solution happened faster and was expressed by the concentration of dyes decreasing over time through UV-vis measurement results. The self-cleaning ability for MB and MO stained cotton fabrics is evaluated quantitatively over time through the K/S value, which showed a good self-cleaning effect.
- ItemONLINE WEAR ANALYSIS OF CARD CLOTHINGS(Technical University of Liberec, ) FISCHER, HOLGER; HEILOS, KATHARINA; THAL, DANIEL; FAASEN, ANDRÉ; HOFMANN, MARCEL; Technická univerzita v LiberciThe processing of abrasive fibres in the carding process, in particular high-performance fibres such as glass, carbon or aramid fibres, can cause increased wear of the card clothing. In the FutureTex project ‘HPFGarnitur’, the wear of card clothing was investigated and an online wear measurement system has been developed. The aim of the project was both, to optimize the clothings to enable gentler processing of the fibres, and to develop a digital monitoring system to observe the degree of wear of the clothings, which offers a new possibility for maintenance prediction and production planning in the sense of Industry 4.0.
- ItemUSAGE OF BIOSURFACTANTS AS ENVIRONMENTAL FRIENDLY DETERGENTS FOR TEXTILE PRODUCTS CLEANING(Technical University of Liberec, ) PARASKA, OLGA; SYNYUK, OLEH; RADEK, NORBERT; ZOLOTENKO, ELLA; MYKHAYLOVSKIY, YURIY; Technická univerzita v LiberciThe paper is devoted to the resource-saving technologies of cleaning the textiles in the aquatic environment. As a resource-saving technology the use of biosurfactant compositions replacing traditional detergents was chosen. These technologies are characterized by high quality cleaning the textile garments, reduced time of operations, reduction of the costs of chemicals and energy, improvement of environmental safety of the process and and also allow to extend the shelf life of products. Resource-saving cleaning technologies (washing, aqua cleaning) have been improved and recommendations for their application have been developed, considering changes in the operational properties of new generation textiles, which will extend the service life of new generation textiles, save operational properties, enable their eco-recycling (reuse) and reduce the impact on the environment and human health through the use of biosurfactant compositions. Innovative compositions of biosurfactants with a synergistic effect in micelle formation were elaborated. Steric factor associated with the rational packaging of biosurfactants molecules in mixed micelles, as well as the possibility of forming micelles of optimal composition can influence synergistic effect. The use of elaborated compositions of biosurfactants in washing processes offers several environmental and health advantages. The complex research of influencing parameters of chemical-technological processes and properties of washing compositions on the basis of correlations the products of new generation were developed that provides improvement of quality of removal of contaminations from textiles and process safety. It is proved that the application of the developed resource-saving technologies saves 10 liters of water per cleaning cycle, 0.0348 kWh of electricity, and 0.142 hours of working time.
- ItemRESISTANCE OF ADDITIONAL ROOFING UNDERLAYS OF PITCHED ROOFS AGAINST ARTIFICIAL AND NATURAL AGEING(Technical University of Liberec, ) NAVARA, TOMÁŠ; Technická univerzita v LiberciIn this paper, the author deals with the resistance of light polymer foils based on microporous functional film, used as additional waterproofing layers of pitched roofs. He exposes these foils to the effects of natural ageing and the effects of artificial ageing according to the methodology of the European test standard. Subsequently, it verifies the tensile properties of the exposed foils and compares the effects of natural and artificial ageing in order to determine the possible cause of premature degradation of these materials, which often occurs in practice. He concludes that the cause of this degradation is not excessive leniency of testing standards, but the insufficient quality of materials supplied to the European market.
- ItemNOVEL ELASTIC WARP KNITTED FABRIC WITH PERFORATION(Technical University of Liberec, ) MELNYK, LIUDMYLA; KYZYMCHUK, OLENA; Technická univerzita v LiberciThe aim of this project is to create novel elastic knitted materials with improved comfort for medical products. In this context, warp knitted structures were produced using different weft threads laying in. The elastic warp knitted fabric produced with transverse weft threads for the whole width was used as a reference sample. It is widely used in medical products. Laying in weft threads with a partial set according to a certain repeat allows us to get structures in which there is no connection in adjacent wales in certain places. This leads to the formation of through holes in the structure. As a result of increased permeability, comfort properties are improving. The structure, functional and comfort properties of developed and reference elastic warp knitted fabrics were investigated. It was found that novel elastic fabrics have higher values of comfort indicators and provide the necessary functional properties.
- ItemIMPROVEMENT OF FLAME RETARDANT AND ANTIBACTERIAL PROPERTIES OF COTTON-POLYESTER BLEND FABRICS(Technical University of Liberec, ) HOROKHOV, IHOR; KULISH, IRINA; ASAULYUK, TATYANA; SARIBYEKOVA, YULIA; SEMESHKO, OLGA; MYASNYKOV, SERGEY; Technická univerzita v LiberciThe fire retardant and antibacterial characteristics of cotton-polyester blend fabric have been improved. A composition has been developed for complex finishing of fabric using a phosphorus-containing substance on a biological basis, which, due to its high phosphorus content, can provide a fire-retardant function to textile material, as well as increase its antimicrobial properties. The thermal characteristics of treated textile materials have been studied and it has been established that the presence of phytic acid at the initial stage of destruction shifts the temperature towards lower values due to the activation of phytic acid degradation before the decomposition of the main substrate. The maximum temperature at which the final destruction of the cotton-polyester fabric occurs shifts to higher temperatures from 507°C for the untreated fabric to 565°C for the treated fabric, and the presence of dry residue increases by more than 2.5 times, which proves an increase in the heat resistance of the textile material. The length of the damaged area in the vertical combustion test was 6.5 cm, and the absence of drop formation of the polyester component was also noted, which eliminates the potential destructive effect due to the possible formation of additional fire areas. An increase in fabric antimicrobial activity is confirmed by a zone of inhibition of 2 – 4 mm around the sample using the diffusion method with gram-positive bacteria Staphylococcus pyogenes, as well as a pronounced growth inhibition of microorganisms around fabric samples examined by the method of inoculation of microflora from the environment. Treatment with the studied composition improves washing resistance and does not impair the mechanical properties of the textile material by increasing the degree of crosslinking of the polymer components used in the finishing composition.
- ItemCOMFORTABLE AND PROTECTIVE HYBRID WEFT-KNIT PLATED FABRIC FROM GLASS AND WOOL/ACRYLIC YARNS(Technical University of Liberec, ) İNCE, MEHMET ERDEM; İNANIR, SEVGI; ERDOĞAN, ESRA KUMSAL; Technická univerzita v LiberciIn this study, hybrid weft-knit plated fabrics were produced by co-feeding glass and wool/acrylic blend yarns. While the wool/acrylic yarn in contact with skin is expected to provide comfort, the glass yarn next to the environment is to provide protection. The physical, structural, air permeability, bursting strength, and the protection against flame properties of glass plus wool/acrylic plated fabric were compared with the reference fabrics consisting completely of glass or wool/acrylic blend yarn. Two factors: the yarn composition and the cam setting of the knitting machine were considered. Two-ply of glass yarn was fed to the each face of the reference glass fabric, and a single-ply of wool/acrylic yarn was fed to the each face of the reference wool/acrylic fabric. On the other hand, while the hybrid plated fabric’s back face accommodated two-ply of glass yarn, its front face involved a single-ply of wool/acrylic yarn. Two different cam settings, loose and tight, were selected. The physical and the structural properties of the fabrics were measured. Then, air permeability, bursting strength, and the protection against flame tests were performed. Test results were subjected to detailed statistical data analysis and how they were affected by the yarn composition and the cam setting was presented with visual and self-explanatory graphs.
- ItemFORMATION OF COMPLEX 3D SURFACES SCANS FOR GARMENT CAD(Technical University of Liberec, ) Riabchykov, Mykola; Mytsa, Viktoriia; Bondarenko, Mykola; Popova,Tetyana; Nechipor, Svitlana; Nikulina, Anastasiia; Bondarenko, Svitlana; Technická univerzita v LiberciAlgorithms for building scans of complex surfaces of the human body based on three-dimensional measurements were founded. A mathematical model of the surface was developed, followed by the definition of triangulation parameters. The accuracy of building sweeps followed by pattern making depends on the direction and number of geometric elements. The obtained data should be used to improve garment CAD for pattern making for individual consumers.
- ItemINVESTIGATION OF STRUCTURAL AND PERFORMANCE PROPERTIES OF HEMP-CONTAINING KNITTED FABRICS WITH DIFFERENT COMPOSITIONS(Technical University of Liberec, ) SEN, KORHAN; KAYA, AYSEGUL; KANIK, GOKSU; Technická univerzita v LiberciThe growing relevance of sustainable materials has increased the importance of hemp-containing products obtained from natural fibers. When the raw materials used in the garment industry are examined, it is observed that the market share of hemp-containing fibers is low in percentage. Researching the production techniques and methods of fabrics to be obtained from hemp fiber and adapting them to the use of clothing will contribute significantly to the development of the hemp product range. It is aimed that these fabrics to be developed will pass tests in accordance with end-consumer standards. In this study, structural and performance properties of hemp fiber were examined and alternatives were produced instead of conventional methods for a sustainable world. In line with the sustainability strategy, there are advantages of hemp fibers in terms of water consumption, environmental impact compared to cotton fiber. Within the scope, studies were carried out to develop single jersey knitted fabrics by hemp- containing at different compositions such as 70 % cotton/ 30 %hemp, 80 % cotton/ 20 %hemp and 90 % cotton/ 10 %hemp, %100 cotton fabric having the similar structural properties was taken as a control sample. As a result, prototype tests were performed considering the structural and performance properties of the developed fabrics.
- ItemDETECTING DAMAGED ZONES ALONG SMART SELFSENSORY CARBON BASED TRC BY TDR(Technical University of Liberec, ) GABEN, MAHDI; GOLDFELD, YISKA; Technická univerzita v LiberciThe study aims to investigate the ability of smart self-sensory carbon roving to detect damaged zones in TRC structures. State of the art monitoring procedures are based on integrative measurements and accordingly are limited in detecting only the occurrence of damage. This study aims to handle this limitation and offers to adopt the Time Domain Reflectometer (TDR) technique. The TDR concept is widely used in Bayonet Nut Coupling (BNC) cables to identify defects along the cable (opens, shorts, etc.). The current study adopts its principle to carbon rovings. To simulate the BNC cable configuration, the study offers to connect two parallel carbon rovings to the TDR Data Acquisition (DAQ) system. The proposed monitoring technique is investigated by loading two textile reinforced MPC beams under uniaxial tensile loading. Results show the potential of the suggested technique to locate damage zones in TRC structures and highlights its limitation.
- ItemTEAR AND TENSILE STRENGTH OF 100% COTTON WOVEN FABRICS’ BASIC STRUCTURES: REGRESSION MODELLING(Technical University of Liberec, ) HOSSAIN, MOHAMMAD MOBARAK; ALIMUZZAMAN, SHAH; AHMED, DEWAN MURSHED; Technická univerzita v LiberciThis research paper aims to estimate the tear and tensile strength of woven fabrics while considering a number of construction factors. Construction variables include ends per cm (EPCm), picks per cm (PPCm), an overall configuration of yarn, and fabric’s areal density or grams per square meter (GSM). While the statistical relationship in deciding the fabric strength is very complicated considering all variables, the correlation-regression model is used to explain the influence of structural parameters on the tear and tensile strength of various fundamental fabrics’ designs. With different thread densities varying reed counts, and heald count using 100 percent cotton yarn having 36.9 tex, eight different designs of plain, twill, and sateen are prepared for the study. Four regression models, built to predict the tear and tensile strength of the sample woven fabrics, are vital components of this research. It is noticed that the setting of yarn affects the tensile strength of the fabrics, and the fabric pattern determines the tear strength of the fabrics. For higher tear strength, matt weave, and tensile strength, a twill structure is desired within this scope of the fabric structures.
- ItemA SUSTAINABLE APPROACH TO SEERSUCKER WOVEN FABRIC PRODUCTION: ELIMINATING ELASTANE AND DOUBLE BEAMS FOR NATURAL MATERIAL-BASED DESIGN(Technical University of Liberec, ) ASMA, AYÇIN; BURGUN, ALPER; DEMIREL, GIZEM; BUDUN GÜLAS, SINEM; Technická univerzita v LiberciNowadays, the increasing social consciousness on the protection of nature and, at the same time, the seeking for comfort and easiness caused by the pandemic, increase the interest in easy-to-use, comfortable textile products produced with natural raw materials. Seersucker woven fabrics are highly preferred in recent years due to their features such as providing wearing comfort and being user-friendly by not requiring ironing. However, in order to provide the three-dimensionality/wrinkle effect in woven seersucker fabrics in the currently used methods, it is necessary to use elastane in the weft/warp or to use double beams during production. At this point, it is not possible to produce completely natural fabric in the method using elastane, and in the other method, a special several warp and machine requirements are emerging. In this study, the literature on seersucker fabrics was reviewed and experimental seersucker weaving applications were carried out. Studies have been carried out in order to produce fabrics using completely natural raw materials (cotton), to improve production efficiency and to increase design possibilities. In this context, instead of the traditional methods used in seersucker fabric creation, seersucker fabric production was carried out with a single beam on the weaving machine by using different weaves in the dobby for fabric design. In this way, it has been provided that the seersucker weaving process can be performed with a single beam on any desired machine by using existing direct warps without the need for a special warp preparation.
- ItemIMPROVE BUILDING DATABASE ON THE OPERATION PROCESS AND PERFORMANCE TIME FOR SEWING OPERATIONS OF KNITTED GARMENT PRODUCTS(Technical University of Liberec, ) THAO, PHAN THANH; PHAN, DUY-NAM; Technická univerzita v LiberciThis paper presents the findings of the study of building and completion of a standard database on the operation process and sewing time for 02 typical products from knitted fabrics, namely Polo-Shirt and TShirt. The study process is carried out based on applying MTM (Methods Time measurement) standard time analysis method and predetermined time system GSD (General Sewing Data). In this research, we have inherited the results from previous studies including Classifying the main parts sewing linkages, formulated sewing technology process and theoretical analysis of the process of manipulating sewing of the main parts, linkages of the 02 classical textile products including Polo-Shirt and T-Shirt by MTM standard time analysis method and GSD predetermined time system; The studies work of the group of authors on the experimental research content determines the simultaneous influence of a group of factors: distance to place the sewing element (cm), the rotation angle of the sewing element (˚), the size of the sewing element, the number of element layers involved in the sewing, the light intensity (lux) and the skills of sewing workers (grade worker) to the sewing time of knitting products and research simultaneous influences of a group of technological factors including: seam length (cm) and stitches per centimeter (stitches/cm), experiment on 4 sewing devices such as 1-needle lockstitch machine, overlock machine (1 needle and 3 threads) and (2 needles and 4 threads), coverstitch machine (2 needles and 3 threads); and with 3 kinds of single jersey fabrics, which are thin, medium, and thick fabrics to sewing time on the machine of Polo-Shirt and T-Shirt products. The above research results show that there is a big difference between the actual values and theoretically calculated values according to MTM method, GSD predetermined time system, the authors have determined a set of adjustment coefficients for the former and the latter for two values of sewing preparation operation time and sewing time on the machine. We have tested the above research results in 03 enterprises: Hanoi Star Fashion Co., Ltd., Tinh Loi Garment Company and Ha Nam Hanosimex Company Limited and received a lot of practical comments from businesses.
- ItemANTIMICROBIAL ACTIVITY OF COTTON FIBRES TREATED WITH PARTICLES EXTRACTED FROM CITRUS PLANTS: A REVIEW(Technical University of Liberec, ) ALI, REHMAT; KARAMAT, UM E HABIBA; NAZIR, HAFIZA SABA; BAIG, MIRZA MUHAMMED MOHSIN; KHAN, BILAL ALAM; ULLAH, ASAD; USMAN, OSAMA; WASEEM, TANYA; TAHIR, MUHAMMAD FARRUKH; Technická univerzita v LiberciNanotechnology is an emerging technology in textile sector for the fabrication of functional textiles with different properties such as antibacterial, hydrophobicity, UV-protection, flame retardancy, anti-static and self-cleaning. In current COVID-19 crises, the development of antimicrobial textiles through the deposition of nanoparticles has emerged as a research subject of particular interest. Recently, the green-synthesis of nanoparticles from plant extracts has become an effective alternative to conventional physical and chemical synthesis methods due to being environmentally benign and nontoxic. In this review article, the significance of nanotechnology in antibacterial finishing of textiles, mechanism of antibacterial activity of nanoparticles, significance of green synthesis methods for nanoparticles have been discussed. The green-synthesis of different nanoparticles from the citrus plant extracts and their application on textiles for imparting antibacterial activity is reviewed in particular. The chemical composition of citrus plant extracts and their role as bioreductants in the synthesis of nanoparticles is also highlighted. Moreover, different qualitative and quantitative standard testing protocols employed for the antimicrobial characterization of plant extracts and textiles have been discussed. The major challenges and limitations associated with the plant-based biosynthesis of nanoparticles have also been highlighted.
- ItemNUMERICAL MODELLING OF TEXTILE STRUCTURES: POTENTIAL AND LIMITS(Technical University of Liberec, ) BOŇKOVÁ, KAROLÍNA; Technická univerzita v LiberciNumerical modelling, namely finite element modelling, is a standardised tool in many branches of engineering. In textile engineering, due to the complexity of the structure, many limitations occur in using this approach. Despite the limitations the finite element modelling of textiles has huge potential for the future. This contribution deals with FE modelling of tensile test in wale and course direction of single jersey knitted fabric. The meso level of the structure was chosen for the model, so it could be possible to track the behaviour of yarn interlacement during the simulated deformation. The virtual model was created according to parameters of single jersey knitted fabric sample, which was produced from polyester monofilament. By using monofilament instead of staple yarn, contacts between fibres in yarn could be excluded in FE model preparation. Two different computational programs were used for simulations – MSC Marc Metant for implicit computing approach and ANSYS LS-DYNA for explicit computing approach. The results from implicit and explicit solver were compared and discussed. Validation of models was done and results were included in the discussion. Due to big deformations of textiles, explicit solver appears to be more suitable for finite element modelling in textile engineering.
- ItemDESIGN OF ELECTRONICALLY CONTROLLED JACQUARD MACHINE FOR MULTI-SHED WEAVING MACHINES(Technical University of Liberec, ) ARSOY, RAŞIT; ASLAN, SELÇUK; Technická univerzita v LiberciThe Jacquard shed opening system, which makes it possible to open the shed by controlling the warp threads in groups and obtain different designs and shapes, differs from other shed opening systems in that each group of warp threads and each of them can be controlled as needed. The various warp movements, which are limited by the number of frames in other shedding systems, are limited by the number of sinkers in the Jacquard system. Since all known Jacquard shedding systems are designed for operation with single shed weaving machines, they cannot be used for shedding on multiple weaving machines. In this study, a new electronically controlled jacquard machine for multiple shed weaving machines was developed, which eliminates this problem and enables the opening of the weaving compartments by controlling the warp threads individually in multiple shed weaving machines, thus allowing the weaving of all known jacquard fabric patterns. The technological and kinematic schemes of the jacquard machine were prepared taking into account the type of fabric to be produced, the operating principles of the weft insertion and shedding mechanisms to be used in the machine to be developed, and the expectations for improving the technical and economic indicators of the machine. The electronically controlled pattern reading system, which consists of modules in the machine, converts the electronic data into mechanical data to ensure shedding. In the cam shedding mechanism, which transmits motion to the knives in the form of a stepped shaft in the multiple weaving machine, the warp threads are placed on the knives so that they can move vertically. They are controlled by specially structured sinkers which, in contact with the blades, move from the lower to the upper state with the help of the blades and from the upper to the lower state with the help of springs. When the warp threads are to remain in the upper position according to the pattern, the sinkers are interlocked by electromagnets to form an undulating nozzle corresponding to the fabric pattern. By arranging the interlocking projections along the sinker, it is possible to match the density of the sinker to the density of the warp threads. Since the machine allows weaving of all known jacquard fabrics, the problem of not being able to produce weaves other than the rag foot weave, which is considered one of the major drawbacks of multiple shed weaving machines, has been solved.
- ItemINVESTIGATION OF THE RESISTANCE OF DIFFERENT TEXTILE PRINTS TO WASHING AND ABRASION(Technical University of Liberec, ) Prybeha, Dmytro; Koshevko, Julia; Skyba, Mykola; Kuleshova, Svetlana; Synyuk, Oleg; Onofriichuk, Volodymyr; Technická univerzita v LiberciThe article presents the next stage of experimental studies applying images to textile materials. The method of calculating the cost of manufacturing thermal transfer according to the proposed technologies, which were obtained as a result of the practical activity of the authors of the article in production conditions, was tested. The operational, and functional properties of thermal transfers have been studied. Durability of printed fabrics to rubbing and washing has been established. The images were applied to synthetic and natural fabrics. The methods of printing were as follows: DTF printing, offset and screen printing. The application of the results of this study will allow to carry out a qualitative and effective assessment of methods of printing images on textile materials depending on the production conditions for each type of product. A practical test of the proposed method of printing images on the products of the author's collection of women's clothing was carried out.
- ItemTHE DEVELOPMENT AND ANALYSIS OF ECO-PRINT AND SCREEN PRINTING COMBINATION USING NATURAL DYES(Technical University of Liberec, ) TRI, YULIANA; NOORYAN, BAHARI; Technická univerzita v LiberciNatural dye is one of the solutions to alleviate environmental damage caused by the textile industry. Existing synthetic dyes have been proven to adversely affect the environment and human. Hence, revisiting natural dyes becomes a correct decision to alleviate existing environmental problems. Eco-print is one of the natural dyeing methods done by using plants typically found in the surroundings. This method has become the subject of various developments, both in its mordanting and making processes. Its visual aesthetics should also receive attention to avoid stagnation. Further development and innovation are necessary. The purpose of this study was to develop the visual aesthetic aspect of the eco-print method. It particularly focused on developing the design and production technique in terms of concepts, materials, and working techniques. This work also adopted a screen printing technique to enrich the motifs and colors. The method utilized in this research was art-based research with the premise of adapting artistic creativity to social research using an artistic practice approach because both are holistic and dynamic. The result showed that eco-print and screen printing methods could be combined, as the latter significantly enhance the eco-print product’s visual aesthetics. However, the result of this combination exhibited poor color fastness, implying the need for further study.
- ItemAN ECO-FRIENDLY DYE FOR BATIK CLOTHES: A NATURAL DYE SOLUTION MADE OF MANGO SEEDS EXTRACT (Mangifera indica L.)(Technical University of Liberec, ) Sobandi, Bandi; Supiarza, Hery; Gunara, Sandie; Gunawan, Wawan; Hamdani, Hafizh Yasir; Technická univerzita v LiberciWaste pollution resulting from the production process of synthetic batik dyes is against the Sustainable Development Goals (SDGs) in the aspects of waste management systems and clean water. One effort to cut down the amount of pollution is the use of natural dyes for coloring batik clothes. This undertaking is not only healthy but also expected to bring in some added value economically, community empowerment, and intergenerational inheritance. This experimental research was carried out collaboratively between the Textile and Batik Craft Studio at the Indonesian University of Education, the Umymay Batik Studio, and the Yogyakarta Batik and Craft Center. A batik cloth was dyed 5 times with a mango seed extract solution as the dependent variable, then fixed with lime solution (Ca(OH)2) and Ferrous Sulfate solution (FeSO4.7H2O) as the independent variables. The dyed fabrics were tested for their colorfastness against washing and sun exposure. The results of the study: 1) The process of dyeing the batik cloth was performed through several stages, that is, by cutting the cloth with a canting stamp, dyeing the cloth, and fixing it with Ca(OH)2 and FeSO4.7H2O, the batik cloth fixed with Ca(OH)2 tended to be brown in color while the other one fixed with FeSO4.7H2O resulted in black; 2) The results of the Color Fastness Test against Washing at 40℃ on the batik cloth that has been dyed with mango seed extract fixed with Ca(OH)2 and FeSO4.7H2O were considered a good category with respective values of 4 on a scale of 5. Likewise, the results of the Color Resistance to Light: Day Light Ray Resistant Test Value with the fixation of Ca(OH)2 and FeSO4.7H2O was in the moderate category with a value of 3 each on a scale of 5. There should be a governmental policy to promote a green industry. As for batik artisans, they can utilize an eco-friendly alternative dye for batik clothes.
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