Determination of dyeing levelness using surface irregularity function

Gunay, Melih

doi:10.1002/col.20502

Cited by 15 publications

(14 citation statements)

References 4 publications

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“…For example, they cost relatively less and are more available in market; there are available digital devices for the color measurement applications in the market, such as SmarScan, Viewport, and DigiEye and it is beneficial to add new applications for these devices; and it is possible to save, transfer and archive the images of the textiles and also to do some corrections on them using digital devices. There are, also, a few researches on the use of the digital devices for the investigation of the levelness and the dye fastness of the dyed textile materials . These benefits and applications of the digital devices make it reasonable to employ digital devices, such as scanner, to evaluate the compatibility of dyes.…”

Section: Mathematical Backgroundmentioning

confidence: 99%

Feasibility of using digital color imaging devices for the determination of cationic dyes compatibility

Salimian

Khalili

Izadan

et al. 2016

Color Research & Application

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In the present research, the compatibility of dyes was evaluated using a scanner by the application of the method proposed by Khalili and Amirshahi, which had been proved as a novel and accurate method for evaluating the compatibility behavior of dye mixtures. A dip‐test method was employed to dye samples, compatibility panels, in binary combinations of cationic dyes on acrylic fibers. In order to use the scanner, first the device was colorimetrically characterized using a regression technique. The tristimulus values obtained from the scanner were, then, used for the reconstruction of the reflectance of the compatibility panels by principal component analysis. Next, the reconstructed reflectance of the panels were transferred to the corresponding K/S spectra and the Khalili and Amirshahi proposed method applied to the spectra in order to obtain the percentage variance (PV), which is the criterion of the dye compatibility. The comparison between the PVs obtained from the scanner and the corresponding one calculated by the spectrophotometrically measured reflectance of the compatibility panels showed a very significant correlation of the compatibility results regarding Pearson correlation coefficients and their K values. It was concluded that due to the smoothness of the reconstructed spectra and the performance of the PCA method of the reconstruction, which manifest itself in the good spectral reconstruction, the scanner method joined with the Khalili and Amirshahi proposed method can reliably be used for the determination of dye mixtures compatibility by a dip test. © 2016 Wiley Periodicals, Inc. Col Res Appl, 42, 337–345, 2017

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Section: Mathematical Backgroundmentioning

confidence: 99%

Feasibility of using digital color imaging devices for the determination of cationic dyes compatibility

Salimian

Khalili

Izadan

et al. 2016

Color Research & Application

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“…Dyes with this property obey the law of spectral additivity (Günay, 2009). A number of investigations with direct and VAT classes of dyes in mixture have proven this statement invalid.…”

Section: Dyebath Stability and Sensitivity To Chemicalsmentioning

confidence: 99%

“…capturing fabric images using a digital camera under standard lighting conditions, 2. analysis of the fabric sample images with software developed using the surface irregularity function suggested. Unlike previous methods, the methodology suggested by the author (Günay, 2009) also deals with the issue of levelness at different scales; that is, at micro or macro levels. The superiority of the proposed approach is that the variation is plotted as a function of grid size.…”

Section: Between-area Variance Curvesmentioning

confidence: 99%

The Future of Dye House Quality Control with the Introduction of Right-First Dyeing Technologies

Gunay¹

2011

Textile Dyeing

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The manufacturing of a textile begins with the fiber input, whereby each processing step results in an added cost to the final product. As dyeing of a textile is often the last step in the manufacturing of a fabric, it requires extra caution to get it right by avoiding waste and maintaining cost control. Only under favourable conditions is it possible to get it right the first time. In the past, it was not unusual for a dyer to re-dye until the target shade was reached. A typical strategy was to start with a base recipe that undershot the target shade. After each dyeing the missing dye component was added to the bath until the shade was matched. The smaller the number of reformulation, the more skilful the dyer was considered. The Right-First-Time (RFT) dyeing concept was introduced in 1970 and became a desired feature of textile dyeing. This concept meant that at each dyeing the target shade was achieved the first time, hence not requiring re-dyeing. However, the successful evolution of the concept depended on work carried out over many years by a relatively small number of organizations. Many application research and development projects were carried out mainly by the laboratory, pilot-plant and bulk-scale equipment of the major users and manufacturers of dyes and equipment, as well as by universities. Since the end of 20th century, with the increased competition, dye houses are asked to meet more exact requirements while they are under pressure to reduce the cost of manufacturing. In order to stay competitive and be in business, they were required to exercise tighter quality control and seek ways to optimize dyeings. This necessitated the understanding of a) dyes, chemicals and substrates and their compatibilities; and b) the parameters that influence the rate and extent of dye uptake by the substrate (Park & Shore, 2007). The variables that are objectively measured and monitored during a dyeing for quality control purposes have traditionally been limited to time, temperature, pH, and conductivity. Measurement of the fabric shade reflectance is only utilized in the development of new recipes/procedures and the verification of the dyed fabric shade. The development of recipes/procedures and the debugging of dyeing problems continue to rely on indirect information obtained by ad-hoc trail and errors, subjective observations, and visual assessments of dyers. The first prototype system (Beck et al., 1990;Keaton & Glover, 1985) to measure the dye build up directly in real-time during a dyeing was developed in 1990's. However, due to technological limitations such as; a) the high cost of spectrophotometers, b) the low computation speed that is not sufficient to process the data generated by the 7 www.intechopen.com

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“…A levelness index and union shade index was then calculated using a Gauss-Newton iteration algorithm based on standard deviation. Gunay [4] investigated the difference in dye levelness of knitted fabric images using the computer language Python. The fabric image was converted into a grey image.…”

Section: Introductionmentioning

confidence: 99%

Assessment of uniformity of fibre coloration in Tencel woven fabrics dyed using reactive dyes

Syed

Wardman

2011

Coloration Technology

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Weave structure and fabric density has an influence on dye penetration. The uniformity of dyeing, expressed as the uniformity of fibre coloration, of Tencel woven fabrics comprised of different weave structures, was assessed. The fabrics were dyed by exhaust and continuous dyeing methods using selected reactive dyes. Cross-sectional images were captured and then given a rating 1-5 with respect to the depth of the fibre filaments of the yarn of the woven fabric. The images were assessed both subjectively and objectively. The uniformity of fibre coloration was expressed in terms of the standard deviation, mean value and histogram analysis such as dispersion and bandwidth. Objective assessment of uniformity of fibre coloration is a more accurate and quicker method than visual assessment and can be used to assess the uniformity of fibre coloration of woven and knitted fabrics dyed by any class of dyes. Improvement of the uniformity of fibre coloration of Tencel fabrics of various weave structures by causticisation of the fabrics and by modification to the padding process was investigated.

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Determination of dyeing levelness using surface irregularity function

Cited by 15 publications

References 4 publications

Feasibility of using digital color imaging devices for the determination of cationic dyes compatibility

Feasibility of using digital color imaging devices for the determination of cationic dyes compatibility

The Future of Dye House Quality Control with the Introduction of Right-First Dyeing Technologies

Assessment of uniformity of fibre coloration in Tencel woven fabrics dyed using reactive dyes

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