http://dspace.daffodilvarsity.edu.bd:8080/handle/123456789/5553 Mon, 06 Jul 2026 15:21:04 GMT 2026-07-06T15:21:04Z http://dspace.daffodilvarsity.edu.bd:8080/handle/123456789/17601 Dyeing Of 100% Cotton Woven Fabric with Guava Leaf Nion, Md Fahim Faysal; Hossain, Md Azmir Guava leaves (Psidium guajava) have the potential to be used as a natural dye for 100% cotton woven fabrics. This study emphasizes environmentally friendly and sustainable textile production. Research on renewable and biodegradable natural sources has been prompted by the growing need for substitutes for synthetic colors because of their negative effects on the environment and human health. Given their high tannin content and widespread availability, guava leaves offer a promising option for natural dyeing. Several stages of the study were involved: guava leaf dye extraction, cotton fabric preparation, dye application with various mordants, and assessment of colorfastness and other performance characteristics. Aqueous techniques were used to extract the dye, guaranteeing a procedure that would not harm the environment. Before being dyed with mordants including alum, ferrous sulfate, and copper sulfate, the cotton fibers were pre-treated to improve color absorption. To achieve a variety of hues and enhance color fixing, mordants were applied. Depending on the mordant employed, guava leaf extract can yield a variety of hues, from delicate yellows to deep browns, according to experimental data. With minor differences depending on the type of mordant used, the dyed materials showed good colorfastness to light, rubbing, and washing. Ferrous sulfate produced deeper hues with improved fastness qualities, whilst alum produced brighter tones with moderate fastness. According to the study, using guava leaves—a waste product in many areas—as a dye source has both financial and environmental benefits. This strategy lessens reliance on artificial dyes, promotes the circular economy, and decreases environmental damage. In addition to acknowledging difficulties with scalability and standardization of natural dyeing methods, suggestions were made for further study on enhancing dye extraction effectiveness and expanding the spectrum of colors that may be achieved. To sum up, guava leaves offer a practical and environmentally friendly substitute for dying cotton textiles, promoting the development of eco- friendly textile techniques. This study highlights the value of combining ancient knowledge with contemporary textile innovation in addition to proving the usefulness of natural dyes. Thesis Sat, 04 Jan 2025 00:00:00 GMT http://dspace.daffodilvarsity.edu.bd:8080/handle/123456789/17601 2025-01-04T00:00:00Z http://dspace.daffodilvarsity.edu.bd:8080/handle/123456789/17600 Study on the Quality Control of Garments Sewing section Islam, Safia The garment industry, a cornerstone of global trade, depends heavily on stringent quality control measures to ensure customer satisfaction and maintain brand reputation. This study examines the critical role of sewing inspection within quality control, identifying key areas for improvement and proposing innovative solutions to address prevalent challenges. Utilizing a mixed-methods research design, the study combines theoretical frameworks with empirical research. Surveys, interviews, and observations conducted with industry experts, quality control personnel, and production workers provide insights into current practices and challenges. Statistical analysis of defect data reveals patterns and trends, leading to actionable recommendations. The findings highlight several key areas for improvement. First, effective training and skill development for sewing operators are crucial in reducing defects. Second, the adoption of advanced inspection technologies, such as automated defect detection systems, can significantly enhance the accuracy and efficiency of quality control processes. Third, the implementation of a multi-layered inspection process—comprising in-line, final, and audit inspections—has been shown to reduce defect rates and improve product consistency. Lastly, regular performance monitoring and feedback mechanisms are essential to sustaining high-quality standards and fostering continuous improvement. These insights contribute to the enhancement of garment quality, offering practical strategies to improve production processes. Beyond the garment industry, the findings provide valuable implications for other manufacturing sectors that rely on intricate assembly processes, ultimately advancing consumer satisfaction and strengthening industry reputation. From the summary of the collected data table I got the defects percentage, this visualization highlights the defect count for each defects, with "Broken stitch" having the highest total defects (14.75%) and "Open seam" (13.1%) and “needle cut" having the lowest (3,27 %). Thesis Wed, 15 Jan 2025 00:00:00 GMT http://dspace.daffodilvarsity.edu.bd:8080/handle/123456789/17600 2025-01-15T00:00:00Z http://dspace.daffodilvarsity.edu.bd:8080/handle/123456789/17599 Study On Different Types Washing Fault in Denim Islam, Md. Jahidul; Shan, Rifat Hossain Denim, a fabric deeply ingrained in the global textile industry, undergoes various washing techniques to achieve a wide range of aesthetic effects, from vintage fades to rugged distressed finishes. In Bangladesh's rapidly growing garment sector, a thorough understanding of denim washing effects is crucial for maintaining product excellence and staying competitive. This study aims to explore the intricate details of washing faults encountered in denim production, with a particular focus on the unique practices and challenges within Bangladesh's manufacturing landscape. Through an extensive examination that includes industry practices, case studies, and empirical data analysis, this research seeks to systematically categorize and analyze the root causes and impacts of various washing faults, such as color bleeding, fabric shrinkage, seam distortion, and uneven abrasion. By unraveling these complexities, the study not only aims to optimize efficiency and sustainability in denim manufacturing processes in Bangladesh but also seeks to equip industry stakeholders with valuable knowledge and strategies to effectively address washing faults. This comprehensive approach enhances product quality and reduces production waste, thereby promoting innovation and driving positive change in the global denim production industry. Thesis Sun, 12 Jan 2025 00:00:00 GMT http://dspace.daffodilvarsity.edu.bd:8080/handle/123456789/17599 2025-01-12T00:00:00Z http://dspace.daffodilvarsity.edu.bd:8080/handle/123456789/17596 Study on Grey Waste in different Knitting Machine Ghosh, Sourav Kumar The work reported in this thesis is an endeavor to have a speculation with facts and figures about the grey wastes generated in single jersey circular knitting machine. I study on kitting fabric faults and it’s cause. Mainly I proper study on two type of knitting machine. Those are single Jersey circular knitting machine and double jersey circular knitting machine. The amount of some serious knit industry flaws, such as holes/cracks, loops/drop stitches, lycra out, knots, and so forth, steadily increases or decreases with changes in stitch length. I obtained several samples of typical knit fabric flaws and some quality inspection sheets using the 4-point system approach from a reputed textile industry for this inspection. I first examined the information from the quality inspection sheets before examining the impact that changing the stitch length has on the frequency of major flaws on grey knit fabric. Thesis Mon, 16 Jun 2025 00:00:00 GMT http://dspace.daffodilvarsity.edu.bd:8080/handle/123456789/17596 2025-06-16T00:00:00Z