Coloration Technology最新文献

{"title":"Unsupervised fabric defect detection based on multiscale image reconstruction and structural similarity assessment","authors":"Zhiqi Yu,&nbsp;Yang Xu,&nbsp;Yuanfei Wang,&nbsp;Yuekun Wang,&nbsp;Xiaowei Sheng","doi":"10.1111/cote.12744","DOIUrl":"10.1111/cote.12744","url":null,"abstract":"<p>Fabric defect detection is a crucial aspect of the textile industry. Currently, deep learning methods have demonstrated exceptional performance in fabric defect detection tasks. However, their performance is greatly affected by the number of defect samples, which is a challenge to obtain during actual production. To address this issue, this article proposes an unsupervised anomaly detection method for fabric defects using image reconstruction networks. This method only requires defect-free samples for training. During the training phase, the model compresses defect-free samples to obtain a low-dimensional manifold and reconstruct them. During the inference phase, the method assesses whether a sample is defective by calculating the reconstruction error between the input and output images, and locates the defect region by computing the difference in various patches. Furthermore, since fabric contains rich texture features, with high correlation between neighbouring pixels, a structure similarity index measure combined with mean absolute error is introduced to evaluate the reconstruction error, which enhances the model's representation ability for defect-free samples. Additionally, considering the diverse texture backgrounds in fabric, a multiscale reconstruction module is designed to optimise the reconstruction effect. Experimental results demonstrate that compared with other related approaches, the proposed method achieves high accuracy (image-based area under the curve (AUC) up to 98.2% and pixel-based AUC up to 97.3%) on multiple datasets and has good generalisation ability for different fabric textures.</p>","PeriodicalId":10502,"journal":{"name":"Coloration Technology","volume":"140 6","pages":"827-842"},"PeriodicalIF":2.0,"publicationDate":"2023-11-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138518102","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Non-allelic recombination interactive genetic algorithms for colour imagery reproduction in colour scheming","authors":"Xiaojian Liu,&nbsp;Ming Li,&nbsp;Boqun Xu","doi":"10.1111/cote.12741","DOIUrl":"10.1111/cote.12741","url":null,"abstract":"<p>Using image extracted colours as the colour source for product colour matching is a common design strategy. The process of colour scheme design involves both source colour combination optimisation and continuous variable optimisation. As a commonly used optimising tool, interactive genetic algorithm (IGA) recombines the colours between alleles, that is, the same area in different colour schemes. Two types of invalid schemes are prone to arise during optimisation. The first is the colour duplication in a colour scheme's areas, which are supposed to be painted differently. The second is the unexpected new colours generated through interpolation between alleles. This article proposes a non-allelic IGA (NA-IGA) method, which allows colour recombination among non-alleles, to avoid invalid schemes and improve algorithm efficiency. The crossover, evaluation, and selection operators are redesigned. NA-IGA tries to maintain the features of extracted colours in the colour schemes while taking user preference into consideration. Thus, interaction methods for colour matching optimisation are designed to extend the evaluation mode of traditional IGA, including colour shuffling, continuous fine-tuning, and so forth. An application test is conducted in the rail vehicle's painting design. The comparison experiment with traditional IGA shows that NA-IGA significantly reduces the generation of invalid schemes and significantly improves efficiency and effectiveness of the optimisation.</p>","PeriodicalId":10502,"journal":{"name":"Coloration Technology","volume":"140 5","pages":"728-742"},"PeriodicalIF":2.0,"publicationDate":"2023-11-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134991899","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Analysing the impact of paper grammage and pulp blend on electrophotographic printing systems","authors":"Sinan Sonmez,&nbsp;Merve Engin,&nbsp;Kecheng Li,&nbsp;Abdus Salam","doi":"10.1111/cote.12738","DOIUrl":"10.1111/cote.12738","url":null,"abstract":"<p>The effect of fibre length and grammage on the electrophotographic digital printing process was investigated in this study. While integral optical density values on handsheets have shown no significant change, unprinted handsheets have shown an increasing change as short fibre content has increased. Because of structural changes in the paper surface, the measured results for print chroma, brightness, contrast, and delta gloss differed between paper groups. This research confirmed that these changes have nothing to do with grammage or fibre length content. Regardless of the fibre length ratios, significant increases in tone values of ink, were accompanied by a decrease in the grammage of the handsheets among the grammage groups provided. The specimen grammage affected the universal colour diagrams, but not the fibre length. The discrepancies in all of these printing outcomes were thought to be caused by the random distribution of fibres and the distances between them on the paper's surface.</p>","PeriodicalId":10502,"journal":{"name":"Coloration Technology","volume":"140 5","pages":"793-804"},"PeriodicalIF":2.0,"publicationDate":"2023-11-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/cote.12738","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136348129","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Polyethylene terephthalate cap-based bioreactors for combined domestic and dye wastewater treatment","authors":"Ahmed Y. Radeef,&nbsp;Alwalid K. Mohammed,&nbsp;Ali B. Salih,&nbsp;Aya A. Najim","doi":"10.1111/cote.12740","DOIUrl":"10.1111/cote.12740","url":null,"abstract":"<p>In the current study, a sequencing batch reactor (SBR), a sequencing batch biofilm reactor (SBBR) and a moving bed biofilm reactor (MBBR) were designed and used to treat actual samples of combined domestic and dye (Congo red) wastewaters over a 10-hour cycle. A new application of reusing plastic bottle caps in the SBBR and MBBR was examined. In the SBR, maximum chemical oxygen demand (COD) removal of up to 66% ± 3% was achieved after nine cycles of operation. In the SBBR, a rapid increase in COD removal efficiency was observed during the first cycle, with a noticeable improvement in performance in subsequent cycles, eventually reaching a maximum COD removal efficiency of 77% ± 3%. In the MBBR, maximum COD removal of up to 88% ± 3% was achieved after nine cycles of operation. The biodegradation occurred during two phases in the SBR and SBBR, as an anaerobic phase in the first 2 hours and then as an aerobic phase in the last 8 hours of operation; the MBBR operated in the fully saturated aerobic phase for 10 hours. Of the three reactors used, results for the MBBR in the fully aerobic condition by using polyethylene terephthalate caps as a biocarrier, demonstrated the optimum conditions under which to treat and biodegrade Congo red at all concentration in each cycle. The maximum removal efficiency, which equalled 99% ± 1%, was recorded at an optimal concentration of 50 mg/L. Additionally, five kinetic models were proposed to assess microbial growth activity, and the results demonstrated the elimination of toxic effects when using polyethylene terephthalate caps as biocarriers in the MBBR. The laboratory experiments were consistent with the Monod model.</p>","PeriodicalId":10502,"journal":{"name":"Coloration Technology","volume":"140 5","pages":"743-756"},"PeriodicalIF":2.0,"publicationDate":"2023-11-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136348209","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Optimisation of laser fading process in denim trousers: An industrial scale approach","authors":"Rıza Atav,&nbsp;Öner Gündüz,&nbsp;Sercan Yaz,&nbsp;Gizem Çakan","doi":"10.1111/cote.12737","DOIUrl":"10.1111/cote.12737","url":null,"abstract":"<p>Colour fading with laser application has now become a well-known and frequently used process in the denim industry. However, in practice, high strength losses and even tears may occur in the trousers as a result of incorrect or excessive laser application. In this study, the effects of resolution (dpi) and pixel time (μs), which are the two main parameters of laser colour fading, and also the effects of two-passage laser treatments on colour fading and fabric strength were examined statistically and optimum conditions were determined. When the results of the studies are evaluated in general, it can be said that as the resolution (dpi) increases during the laser process, the colour fading effect increases, but when it is above the 31 dpi value, the strength loss increases excessively. As the second important parameter, the pixel time, increased, the colour fading effect increased. When the time exceeds 80 μs, there is a marginal increase in the strength loss value. Furthermore, it was observed that colour fading (%) values increase if laser process is applied in two passages, but in this case also the tear strength loss increases. It can be said that optimising the laser processing conditions in enterprises according to the product type (fibre content, weight, etc.) is a more accurate approach in terms of both the fading performance to be obtained and product quality. For 11.25 ounce trousers made of 95.3% cotton/3.4% polyester (T400)/1.3% elastane used in this study, it can be said that laser application could be made in two passages if necessary for obtaining high colour fading, however it should be noted that resolution and pixel time should not exceed 31 dpi and 80 μs, respectively. Provided that resolution and pixel time does not exceed 31 dpi and 80 μs, respectively, they can be changed depending on the degree of colour fading needed.</p>","PeriodicalId":10502,"journal":{"name":"Coloration Technology","volume":"140 4","pages":"653-661"},"PeriodicalIF":2.0,"publicationDate":"2023-11-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135974541","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Molecular imprinting of cellulose cotton fabric/silica materials with a colorimetric dithizone chelation for smartphone-based detection of Zn (II) ions in water samples","authors":"Lita Chheang,&nbsp;Tongchai Sriwiriyarat,&nbsp;Sudtida Pliankarom Thanasupsin,&nbsp;Nisakorn Thongkon","doi":"10.1111/cote.12736","DOIUrl":"10.1111/cote.12736","url":null,"abstract":"<p>Molecularly imprinted materials based on imprinting dithizone-Zn (II) (DTZ-Zn (II)) complexes onto cotton fabric/silica, and the Color Grab application for the OPPO A54 smartphone, were proposed and applied for the first time to detect Zn (II) ions in water samples. The proposed materials were prepared by using cotton fabrics as cellulosic materials, tetraethoxysilane as silica sources and DTZ-Zn (II) as template molecules. The initial concentration of DTZ and Zn (II), the volume of tetraethoxysilane and the reaction time were optimised to obtain the maximum adsorption of the DTZ-Zn (II) complexes in the imprinted materials. The concentration of hydrochloric acid and the extraction time were optimised to obtain the maximum Zn (II) removal. The results found that 10 mL of a solution containing DTZ (0.20 mM) and Zn (II) (0.30 mM), 25 μL of tetraethoxysilane, with 10 minutes reaction time, exhibited the strongest binding of the template complexes. Zn (II) ions were selectively removed from the materials by using 0.1 M hydrochloric acid for 10 minutes. The morphology of the prepared materials was characterised by scanning electron microscopy–energy-dispersive X-ray spectroscopy and attenuated total reflectance–Fourier Transform-infrared spectroscopy. The smartphone measurement based the cotton fabric/silica materials exhibited linear relationship between saturation (%) and Zn (II) concentrations in the range of 0.1 to 1.0 mg/L, with limit of detection of 0.02 mg/L and limit of quantification of 0.06 mg/L. The proposed method was successfully applied to determine Zn (II) in real-water samples with the % recovery ranging from 98% to 115% and an acceptable relative standard deviation of less than 6 (<i>n</i> = 3).</p>","PeriodicalId":10502,"journal":{"name":"Coloration Technology","volume":"140 4","pages":"637-652"},"PeriodicalIF":2.0,"publicationDate":"2023-10-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136317234","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Dyeing of cotton/acrylic blend fabric in a single-bath-single-stage method using indigo dye","authors":"Mohammad Tajul Islam,&nbsp;Mohammed Mehedy Alam,&nbsp;Md Aminul Islam,&nbsp;Tanvir Ahmed Riyadh","doi":"10.1111/cote.12734","DOIUrl":"10.1111/cote.12734","url":null,"abstract":"<p>In this study, an attempt has been made to dye cotton/acrylic blend fabrics in a single-bath-single-stage method considering today's growing market for such blended products. Yarn-blend cotton/acrylic fabric was produced and dyed at 3% shade using indigo dye in the exhaust method to optimise the dyeing conditions by varying the amount of reducing agent, pH, and dyebath temperature. The colour yield of both the acrylic part and cotton components of the blend was influenced by pH levels. Meanwhile, the temperature played a notable role in determining the colour yield of the acrylic portion. Optimised dyeing conditions were obtained at pH 6 and 120°C for the acrylic part, whereas pH 11 and 90°C temperature were obtained for the cotton part. These conditions involved the use of sodium dithionite (15 g/L) as a reducing agent and sodium hydroxide as an alkali. While the yarn-blend fabrics exhibited a unique shadow dyeing effect, solid dyeing results were achieved with fibre-blend fabrics, underscoring the versatility of this single-bath-single-stage method. To assess the overall dyeing performance, comprehensive evaluations including bursting strength measurements, assessments of fastness to washing, perspiration, and rubbing were conducted, all of which provided valuable insights into the durability and colour retention of the yarn-blend fabrics. This research not only addresses the demand for cotton/acrylic blend fabrics in today's market but also demonstrates an efficient and innovative single-bath-single-stage dyeing approach using indigo dye, which holds promise for the textile industry's future sustainability and product diversity.</p>","PeriodicalId":10502,"journal":{"name":"Coloration Technology","volume":"140 5","pages":"710-718"},"PeriodicalIF":2.0,"publicationDate":"2023-10-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135112604","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Synthesis and characterization of iron oxides and their application as inorganic pigments in white paint","authors":"Milena Z. Lemos,&nbsp;Silvia Jaerger,&nbsp;Nayara Balaba,&nbsp;Dienifer F. L. Horsth,&nbsp;Juan C. Villalba,&nbsp;Felipe L. Stefenon,&nbsp;Pedro P. González-Borrero,&nbsp;Fauze J. Anaissi","doi":"10.1111/cote.12735","DOIUrl":"10.1111/cote.12735","url":null,"abstract":"<p>The tones of iron oxide pigments range from yellow, red, brown and green to black. Iron oxide pigments are non-toxic and have a nanometric particle size, which makes them ideal for use as pigments. The current study synthesised synthetic inorganic pigments based on iron oxides using the alkaline precipitation method. This approach to the synthesis of iron oxide pigments makes them less expensive for obtaining reproducible colours. Iron salts (iron (III) chloride, iron (III) nitrate, iron (II) sulphate [ferrous sulphate] and iron (III) sulphate) have been combined with alkaline solutions (sodium hydroxide, potassium hydroxide and ammonium hydroxide) to form coloured iron oxides, which are widely known as natural inorganic pigments. The 12 samples produced in four different colours (red, yellow, brown and black) were left in aqueous suspension and dispersed in commercial real white estate paint, to evaluate their behaviour as pigments. Structural characterisation (X-ray diffractometry), composition (X-ray fluorescence by dispersive energy), thermal analysis (i.e. thermogravimetric analysis and the differential thermal analysis) and spectroscopy (FTIR and photoacoustic), as well as colorimetry, were performed. The phases indexed by X-ray diffractometry were goethite, haematite, magnetite and lepidocrocite. The inorganic pigments produced are compatible with natural inorganic pigments. They also showed dispersion compatibility in commercial white paint without changing the surface coating powder and are therefore an alternative to synthetic inorganic pigments.</p>","PeriodicalId":10502,"journal":{"name":"Coloration Technology","volume":"140 5","pages":"769-781"},"PeriodicalIF":2.0,"publicationDate":"2023-10-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135216871","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Exploration on energy-saved dyeing method for polyimide fabrics with alkali treatment","authors":"Xiru Shao,&nbsp;Xin Chen,&nbsp;Chen Xi,&nbsp;Chenchen Zhan,&nbsp;Xiaojing Lv,&nbsp;Shan Jiang,&nbsp;Tao Zhang,&nbsp;Genyang Cao","doi":"10.1111/cote.12733","DOIUrl":"10.1111/cote.12733","url":null,"abstract":"<p>The difficulty of dyeing is a disturbing problem for the various application of polyimide fabrics. Alkali treatment has been widely used as a preliminary step before dyeing, denoted as a two-bath method. With more attention being paid to energy resources, this work aims to explore more economical and environmentally friendly dyeing technology, combining the alkali treatment and the dyeing process together, named a one-bath method. Surprisingly, the <i>K/S</i> value of the one-bath dyed fabric is much higher than that of the two-bath sample, in which the red colour value is enhanced by 59.9% for the one-bath sample. As for the effect of dyeing on the physical properties, the two-step method has been demonstrated to exert more severe damage on the fibre, with lower crystallinity and tensile strength. To explain such results, it is deduced that when alkali is added together with dyes, it can play a bridge role between the dyes and the fibre, anchoring the dyes wherever the alkali can permeate. Furthermore, 17.25 J of the energy is calculated to be saved for the dyeing of 60 g of fabric, which is very inspiring for large-scale application.</p>","PeriodicalId":10502,"journal":{"name":"Coloration Technology","volume":"140 4","pages":"629-636"},"PeriodicalIF":2.0,"publicationDate":"2023-10-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135088043","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Synergistic anti-bacterial activity of imidazole-based azo dyes with polyvinylpyrrolidone-coated silver nanoparticles","authors":"Ana Isabel Ribeiro,&nbsp;Daniela Dantas,&nbsp;Luís Filipe Carvalho,&nbsp;Jorge Padrão,&nbsp;Renata Silva,&nbsp;Fernando Remião,&nbsp;Eugénia Pinto,&nbsp;Fátima Cerqueira,&nbsp;Alice Maria Dias,&nbsp;Andrea Zille","doi":"10.1111/cote.12732","DOIUrl":"10.1111/cote.12732","url":null,"abstract":"<p>The high demand for novel antimicrobial textiles by the medical, healthcare, hygiene, sportswear, personal protective equipment and filtration sectors has promoted the growth of functional textiles. However, the efficacy of antimicrobial agents against different pathogens is a considerable challenge because of the distinctive mechanisms of action and resistance. The development of novel synergistic antimicrobial dyes may offer numerous opportunities to enhance antimicrobial effectiveness. In this work, a novel imidazole-based azo dye with a <i>p</i>-methoxyphenyl group in the <i>N</i>-1 substituent of the imidazole ring (AzoIz-a), and corresponding amidrazone precursor (AmIz-a), were combined with polyvinylpyrrolidone-coated silver nanoparticles (AgNPs). The molecules, alone and combined with the AgNPs, were characterised by ultraviolet-visible spectrophotometry and zeta potential. Their synergistic effect was assessed against <i>Staphylococcus aureus</i>, <i>Escherichia coli</i> and <i>Pseudomonas aeruginosa</i>. The results were compared with a previously reported imidazole-based azo dye and precursor containing a methyl group in the imidazole ring (AmIz-b and AzoIz-b). The results showed interesting antimicrobial properties of the novel AzoIz-a molecules when combined with a very small concentration of AgNPs. The combination showed an additive effect for <i>S. aureus</i> and a synergistic effect for <i>E. coli</i> and <i>P. aeruginosa</i>. Considering the synergistic results, the effective concentration of the AzoIz-a decreased from more than 128 to 16-32 μg.mL⁻¹ by the addition of a small concentration of AgNPs (0.6-1.3 μg.mL⁻¹), which displayed comparable results with the AzoIz-b molecule. Thus, the application of these conjugates in textiles may lead to highly coloured materials with remarkable anti-bacterial properties, which warrant further exploration.</p>","PeriodicalId":10502,"journal":{"name":"Coloration Technology","volume":"140 5","pages":"719-727"},"PeriodicalIF":2.0,"publicationDate":"2023-10-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135413215","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}