Coloration Technology最新文献

{"title":"Investigation of the application angle and mode parameters on colour fading obtained in laser process","authors":"Rıza Atav, Öner Gündüz, Sercan Yaz, Gizem Çakan","doi":"10.1111/cote.12785","DOIUrl":"https://doi.org/10.1111/cote.12785","url":null,"abstract":"In this study, the effect of four factors affecting colour fading in the laser process (resolution in the <jats:italic>X</jats:italic> direction, resolution in the <jats:italic>Y</jats:italic> direction, pixel time and application direction/angle [56°, horizontal, vertical]) were statistically examined. Then, the effect of application direction/angle (56°, horizontal, vertical) and application mode (Normal, HDR Soft, HDR Medium) were investigated in more detail. It is believed that this study will contribute to the literature and is original since there is no study on the effect of application angle and/or mode during laser treatment. It was found that beyond the resolution and pixel time, application direction/angle and mode (HDR Medium &gt; HDR Soft &gt; Normal) are important in terms of colour fading for 11.25 ounce trousers made of 95.3% cotton/3.4% polyester (T400)/1.3% elastane used in this study.","PeriodicalId":10502,"journal":{"name":"Coloration Technology","volume":null,"pages":null},"PeriodicalIF":1.8,"publicationDate":"2024-09-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142182218","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":"Effect of chromophore type on efficiency of reactive dye removal using polyamidoamine dendrimer","authors":"Riza Atav, Eray Akkuş, Deniz İzlen Çifçi, Uğur Ergünay, Yalçın Güneş, Elçin Güneş","doi":"10.1111/cote.12786","DOIUrl":"https://doi.org/10.1111/cote.12786","url":null,"abstract":"In this study, by selecting a sample of dyes from a wide variety of chromophores used in the production of reactive dyes (monoazo, bisazo, metal azo, phthalocyanine, anthraquinone, copper formazan and triphendioxazine), the colour removal performance of polyamidoamine (PAMAM) dendrimer in reactive dyes was statistically evaluated depending on the dye chromophore groups (and accordingly molecular weight and number of sulfo groups of the dye), dendrimer concentration and centrifugation time. When all the results were examined, it was observed that the colour removal efficiency was significantly lower in metalazo and copper formazan‐based reactive dyes, whereas colour removals ranging from 93% to 98% could be obtained in bisazo, triphendioxazine, monoazo, anthraquinone and phthalocyanine dyes. With the use of dendrimer, the best colour removal efficiencies occurred at pH 3. However, it was found that the centrifugation time of 15 min is sufficient for all dyes, and a longer centrifugation does not provide any additional benefit in terms of colour removal.","PeriodicalId":10502,"journal":{"name":"Coloration Technology","volume":null,"pages":null},"PeriodicalIF":1.8,"publicationDate":"2024-09-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142182229","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":"Preparation and characterisation of pH‐responsive indicator ink for pork freshness monitoring","authors":"Haichuan Hu, Jianqiang Wang, Haolin Sun, Yuheng Chen, Jinghua Chen","doi":"10.1111/cote.12784","DOIUrl":"https://doi.org/10.1111/cote.12784","url":null,"abstract":"This study developed an intelligent indicator ink based on purple potato anthocyanin to detect the freshness of pork. The ink was composed of waterborne acrylic resin as a binder, with added additives such as dimethyl silicone oil, sodium polyacrylate and ethanol to improve its performance. Testing was conducted on the initial drying, viscosity, fineness, fluidity and stability of the ink, and all performance criteria met the requirements. Gradient solutions with pH 2–12 were dropped onto the ink to test their discoloration ability, which exhibited significant changes in colour with the difference in pH solutions. The indicator ink was applied to monitor the freshness of pork. After 7 days of storage at 4°C, the total volatile basic nitrogen content of the pork was higher than 25 mg/100 g, and the total number of bacteria was &gt;9 log(CFU/g), indicating that the pork had gone rotten. The colour of the indicator ink shifted from purple to purplish blue and ultimately became deep blue. The results showed that the indicator ink provided an effective colour response in the process of pork deterioration, allowing for visual detection of its freshness.","PeriodicalId":10502,"journal":{"name":"Coloration Technology","volume":null,"pages":null},"PeriodicalIF":1.8,"publicationDate":"2024-08-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142227639","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":"The plasticisation model of dye diffusion: Part 2","authors":"Stephen M. Burkinshaw","doi":"10.1111/cote.12782","DOIUrl":"https://doi.org/10.1111/cote.12782","url":null,"abstract":"Temperature dependent equilibrium dye adsorption data reported for <jats:italic>Chlorazol Fast Scarlet 8B, Durazol Red 2B</jats:italic> and <jats:italic>Chrysophenine G</jats:italic> on cotton, CV and CUP fibres and <jats:italic>Durazol Grey RG</jats:italic> on cotton and CV fibres in the presence of a constant amount of added inorganic electrolyte between 60°C and 90°C, as well as <jats:italic>Chrysophenine G</jats:italic> on cellophane sheet in the presence of varying amounts of added inorganic electrolyte, between 60°C and 97.5°C, was re‐evaluated using the Williams‐Landel‐Ferry equation. The results obtained suggest that the plasticisation model of dye diffusion appears to offer a reasonable explanation of the temperature dependent equilibrium adsorption of direct dyes on cellulosic fibres/polymers.","PeriodicalId":10502,"journal":{"name":"Coloration Technology","volume":null,"pages":null},"PeriodicalIF":1.8,"publicationDate":"2024-08-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142182230","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":"Solvatochromic, computational chemical and E/Z geometrical isomerism studies on some aryl‐hydrazones synthesised by reacting of aryldiazonium chlorides with 6‐butyl‐4‐hydroxyquinolin‐2(1H)‐one","authors":"Enayatollah Moradi Rufchahi, Fatemeh Ashuri Mirsadeghi","doi":"10.1111/cote.12781","DOIUrl":"https://doi.org/10.1111/cote.12781","url":null,"abstract":"A series of 3‐(2‐aryl‐hydrazone)‐quinolin‐2,4‐diones were synthesised by the reaction of aryldiazonium chlorides with 6‐butyl‐4‐hydroxyquinolin‐2(1<jats:italic>H</jats:italic>)‐one dissolved in water containing equimolar amount of sodium hydroxide. All the reactions were carried out at 0–5°C and the corresponding hydrazones were obtained in satisfactory yields and purified easily by recrystallisation from hot dimethylformamide. According to proton nuclear magnetic resonance (<jats:sup>1</jats:sup>H NMR) and ultraviolet‐visible (UV‐visible) results, there are two kinds of intramolecular hydrogen bonds in these synthesised aryl‐hydrazones which enables the compounds to be rotated about the hydrazone C=N bond and through that leads to a reversible isomerisation between their <jats:italic>E</jats:italic> and <jats:italic>Z</jats:italic> configurations. The isomers populations and the rotation phenomenon can be controlled by changing the polarity of the solvents. The <jats:italic>E/Z</jats:italic> ratio of each synthesised compound was studied in deuterated dimethyl sulfoxide (DMSO‐<jats:italic>d</jats:italic><jats:sub>6</jats:sub>) and, if soluble in deuterated chloroform (CDCl<jats:sub>3</jats:sub>) and compared. The results reveal that a decrease in solvent polarity (upon changing the solvent from DMSO‐<jats:italic>d</jats:italic><jats:sub>6</jats:sub> to CDCl<jats:sub>3</jats:sub>) shifts the isomeric balance to <jats:italic>Z</jats:italic>‐geometrical form and substantially increase the <jats:italic>E/Z</jats:italic> ratio. A density functional theory (DFT) analysis regarding highest occupied molecular orbital (HOMO), HOMO −1, lowest unoccupied molecular orbital (LUMO), and LUMO +1 has been conducted and discussed. The results obtained from DFT calculations at B3LYP/6‐31G(d) level of theory, demonstrated that the hydrazone tautomeric forms are more stable with the lowest total energy and showed a good agreement with the experimental findings in both gas and solution states. As it is expectable, DFT calculation in CDCl<jats:sub>3</jats:sub> and DMSO‐<jats:italic>d</jats:italic><jats:sub>6</jats:sub> indicate that the dipole moments of the <jats:italic>Z</jats:italic> configurations are significantly higher than those of the <jats:italic>E</jats:italic> structures.","PeriodicalId":10502,"journal":{"name":"Coloration Technology","volume":null,"pages":null},"PeriodicalIF":1.8,"publicationDate":"2024-08-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141882375","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":"Enzymatic coloration of wool fabrics and its comparison with conventional dyeing","authors":"Rıza Atav, Gökmen Karagöz, Uğur Ergünay","doi":"10.1111/cote.12783","DOIUrl":"https://doi.org/10.1111/cote.12783","url":null,"abstract":"The search for a more ecological alternative to dyeing processes, which is the most polluting textile process, has become one of the most studied topics today. In this respect, enzymatic colouring with the use of laccases offer important opportunities, but studies on enzymatic colouring are still very limited. However, in order for enzymatic dyeing to find industrial‐scale use, the colour variety must be wide. Within the scope of this study, it is an important output that this study has brought to the literature, that the variety of colours that have been obtained in the literature in enzymatic dyeing has been increased so far by working with a wide variety of precursors and their mixtures, including those that have not been tested on wool before. At the same time, the reaction mechanism of the enzymatic dye synthesis and the chemical structures of the dyes were elucidated by Fourier‐transform infrared spectroscopy. Beyond that, as it is known, when a new dyeing process is developed, its technical, economic and ecological advantages and disadvantages compared to the currently accepted conventional dyeing should be revealed. In this study, the colours obtained by enzymatic dyeing were matched with 1:2 metal complex dyes and then two fabrics dyed with the same colour, one enzymatic and the other with conventional method, were compared in terms of technical (colour, fastness), economic (water, energy and chemical consumption) and ecological (biological oxygen demand of wastewater, chemical oxygen demand, etc.) aspects.","PeriodicalId":10502,"journal":{"name":"Coloration Technology","volume":null,"pages":null},"PeriodicalIF":1.8,"publicationDate":"2024-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141882377","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":"Colour difference detection algorithm for warp‐knitted fabric based on image colour appearance model","authors":"Guosheng Xie, Yang Xu, Xiaowei Sheng, Yike Jin, Yize Sun","doi":"10.1111/cote.12779","DOIUrl":"https://doi.org/10.1111/cote.12779","url":null,"abstract":"Detecting colour differences in warp‐knitting fabric is essential to ensure its quality. Machine vision algorithms are commonly used for automatic colour difference detection. However, the current algorithm directly extracts RGB (red, green, blue) colour stimulus values from the image without considering the image's colour attributes, leading to a significant error in colour difference detection. To solve this issue, a colour appearance model is introduced into the field of colour difference detection for warp‐knitted fabric. Initially, a colour appearance model based on CAM16 is established, and the critical parameters are calculated to obtain the colour appearance attribute of the fabric. The colour difference calculation formula is then constructed in the uniform colour space of CAM16‐UCS. A template selection algorithm based on principal component analysis was designed to select warp‐knitted cloth images with standard colours. Subsequently, a cloth colour difference detection algorithm was developed using the cloth colour profile model. The performance of the colour difference formula based on the colour profile model was evaluated using the PF/3 method. To compare the CIELab, CMC(2:1), and CIEDE2000 colour difference formulas, standardised residual sum of squares was used. The results indicated that the colour difference formula based on the colour‐appearance model is about 5.32% different from the visual colour difference perceived by the human eye. However, it can perform as well as the CMC(2:1) colour difference formula, which is widely used in the textile industry.","PeriodicalId":10502,"journal":{"name":"Coloration Technology","volume":null,"pages":null},"PeriodicalIF":1.8,"publicationDate":"2024-07-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141587382","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":"Towards structurally new cyanine dyes—investigating the photophysical and potential antifungal properties of linear substituted heptamethine dyes","authors":"Okoh Adeyi Okoh, Clare L. Lawrence, Roger H. Bisby, Sarah L. Brennan, Robert B. Smith","doi":"10.1111/cote.12780","DOIUrl":"https://doi.org/10.1111/cote.12780","url":null,"abstract":"The synthesis of a range of new linear substituted heptamethine dyes has been designed and described. The photophysical properties of all the dyes were investigated, with many exhibiting improved fluorescent quantum yields when compared with indocyanine green. Finally, growth inhibition studies were performed in the fission yeast <jats:italic>Saccharomyces pombe</jats:italic>, which suggests potential antifungals activity in the μM range.","PeriodicalId":10502,"journal":{"name":"Coloration Technology","volume":null,"pages":null},"PeriodicalIF":1.8,"publicationDate":"2024-07-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141570760","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":"FP‐Flow: Feature pyramid flow model for fabric defect detection","authors":"Yuanfei Wang, Yang Xu, Zhiqi Yu, Xiaowei Sheng","doi":"10.1111/cote.12768","DOIUrl":"https://doi.org/10.1111/cote.12768","url":null,"abstract":"Fabric defect detection is a crucial aspect of fabric production. At present, deep learning detection methods mostly rely on supervised learning. To tackle this issue, this study proposes an unsupervised fabric defect detection approach based‐on normalising flow. The method only needs to train the mapping of the feature probability distribution of defect‐free samples to a Gaussian distribution. In the inference process, the location of defects can be determined by testing the distance between the probability distribution of image features and the estimated distribution. To adapt to the complex background and various minor defects of the fabric, a feature pyramid structure is adopted. Moreover, considering the gradient vanishing and network degradation caused by deep layers during training, a residual structure is incorporated into the model. Experimental results demonstrate that the feature pyramid flow model outperforms other methods in defect detection across multiple datasets, with an average score rate of 98.7% and 100% for pixel‐level area under the curve (AUC) receiver operating characteristic and image‐level AUC, respectively, compared to an average score rate of 91.1% and 85.4% for other methods.","PeriodicalId":10502,"journal":{"name":"Coloration Technology","volume":null,"pages":null},"PeriodicalIF":1.8,"publicationDate":"2024-07-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141524449","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":"The mathematical model for colour preference in Chinese painting within museum lighting environments","authors":"Rui Dang, Shuning Wang, Xingcan Sun, Ming Tang, Di Yang","doi":"10.1111/cote.12778","DOIUrl":"https://doi.org/10.1111/cote.12778","url":null,"abstract":"Colour in a Chinese painting not only conveys cultural, historical, and philosophical concepts but also carries specific symbolic meanings and emotions, possessing a high level of artistic value. However, the sensitivity of Chinese paintings to light results in exhibition environments being characterised by low illuminance and low colour temperature. Therefore, accurately assessing colour preferences in Chinese paintings under such conditions is an issue that needs to be addressed. This study conducted simulated experiments in real museum exhibition halls, with 36 participants providing subjective evaluations of Chinese paintings, to explore the effects of various lighting parameters on colour preferences. Through statistical analysis and multiple linear regression, the relationship between lighting parameters and colour preferences in a Chinese painting was determined, and an evaluation model was established. This research outcome provides important mathematical tools for selecting appropriate lighting and developing dedicated lighting for Chinese paintings, ensuring the artistic inheritance of Chinese painting colours.","PeriodicalId":10502,"journal":{"name":"Coloration Technology","volume":null,"pages":null},"PeriodicalIF":1.8,"publicationDate":"2024-06-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141336479","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}