Effect of the Process of Dyeing a Natural Fiber Fabric Using Watery Extract of Cochineal (original) (raw)
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Cotton fabric dyeing with cochineal extract: influence of mordant concentration
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Dyeing with cochineal extract has been carried out in Mexico since pre-Hispanic times as a handcraft process. However, this has limited its application on fabrics other than wool. An experiment was designed to study the influence of mordant concentration on colour behaviour in cotton fabric dyed with cochineal extract at the laboratory. At the same time, colour fastness was determined by applying six fastness tests to define the quality of the dyed fabric. It was concluded that, when there was a larger concentration of metallic ions in the mordant, colour fixation in the fabric was better, as there was less lightness in the red hue of the fabric. In addition, the more hydrogen ions present because of acids, the more intense the red hue. A decreasing trend in the colour fastness tests was observed: dry rubbing > artificial light > acids > alkalis > domestic washing > hot water.
Natural Dyeing of Modified Cotton Fabric with Cochineal Dye
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Natural dyes are not harmful to the environment owing to their biodegradability. For dye application to textiles, salts are necessary as mordant or electrolytes and make an environmental impact. In this paper, the influence of cationization during mercerization to the dyeing of cotton fabric with natural dye from Dactylopius coccus was researched. For this purpose, bleached cotton fabric as well as fabric cationized with Rewin OS was pre-mordanted using iron(II) sulfate heptahydrate (FeSO4·7H2O) and dyed with natural cochineal dye with and without electrolyte addition. For the characterization of surface changes after cationization, an electrokinetic analysis on SurPASS was performed and compared to pre-mordanting. For determination of dye exhaustion, the analysis of dye solution was performed on a UV/VIS spectrophotometer Cary 50 Solascreen. Spectrophotometric analysis was performed using a Datacolor 850 spectrophotometer, measuring remission ”until tolerance” and the whiteness deg...
Optimization of Dyeing Process of Cotton Fabric with Cochineal Dye
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The objective of this research is to optimize the dyeing parameters for cotton fabric with natural dyestuff extracted from Dactylopius coccus. In order to obtain purple hue, the influence of dyeing process conditions i.e. dye bath pH, concentration of dyestuff, and the addition of electrolyte has been studied. Additionally, potassium aluminium sulfate dodecahydrate and iron (II) sulfate heptahydrate were used as mordants on cotton fabrics in order to obtain coloration of specific purple hue. Colorimetric data and fastness properties of the dyed samples have been analyzed. Results indicate that the dyeing parameters as well as pre-treatment has a significant influence on the obtained purple shades and fastness properties.
Analysis of Different Chemical Dyes on Fabrics Based on Their Dyeing Properties
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Dyes are coloured substances which can adhere to the surface of material and are used to give colour to paper, food stuffs and various textiles such as cotton, wool, synthetic fibre, silk etc. Dyeing of textiles has been practiced for thousands of years. The present work focuses on dyeing of cotton and wool by dyes like malachite green and vasantha colour. Also the dyeing properties of cotton without using the mordant is also analysed.
A Note on Characterization of the Cochineal Dyestuff on Wool Using Microspectrophotometry
The use of microspectrophotometry to characterize cochineal in dyed wool is described, The effect of mordants and adjuvants on the absorbance and emission spectra was measured. Chromium, copper, and iron mordants and bases cause a red shift in absorbance spectra while tin and aluminum mordants and acids cause a blue shift. Cochineal mordanted with tin and aluminum fluoresces while chromium, copper, and iron mordants quench fluorescence. There is a great deal of overlap in the absorbance and emission spectra of the different dye formulations. A plot of all three emission peal maxima discriminates among substantive, mordanted, and acid-treated unmordanted cochineal.
The colorant behaviour of cochineal and kermes insect dyes in 141 experimentally-dyed and 28 artificially-aged samples of silk and wool was investigated using ultra-high performance liquid chromatography coupled to photodiode array detector (UHPLC-PDA), liquid chromatography electrospray ionisation mass spectrometry (LC-ESI-MS) and image scanning electron microscopy – energy dispersive X-ray spectroscopy (SEM-EDX). Partial-least squares discriminant analysis (PLS-DA) was then used to model the acquired UHPLC-PDA data and assess the possibility of discriminating cochineal insect species, as well as their correspondent dyed and aged reference fibres. The resulting models helped to characterize a set of 117 red samples from 95 historical textiles, in which UHPLC-PDA analyses have reported the presence of cochineal and kermes insect dyes. Analytical investigation of the experimentally-dyed and artificially-aged fibres has demonstrated that the ratio of compounds in the insects dye composition can change, depending on the dyeing conditions applied and the type of fibres used. Similarities were observed when comparing the UHPLC-MS and SEM-EDX results from the dyed and aged references with the historical samples. This was verified with PLS-DA models of the chromatographic data, facilitating the classification of the cochineal species present in the historical samples. The majority of these samples were identified to contain American cochineal, which is in agreement with historical and dye identification literature that describe the impact of this dyestuff into European and Asian dyeing practices, after the Iberian Expansion in the 16th century. The analytical results emphasize the importance of using statistical data interpretation for the discrimination of cochineal dyes, besides qualitative and quantitative evaluation of chromatograms. Hence, the combination of UHPLC-PDA with a statistical classification method, such as PLS-DA, has been demonstrated to be an advisable approach in future investigations to assess closely related species of natural dyes in historical textile samples. This is particularly important when aiming to achieve more accurate interpretations about the history of works of art, or the application of natural dyes in old textile production.
Journal of Natural Fibers, 18(9): 1247-1260, 2021
In the present work, cotton fabrics were dyed with natural dye extracted from the barks of a plant named Calligonum comosum. The dyed fabrics were mordanting with four mordants (potassium aluminium sulphate, black eco-crumb, ferrous chloride, and ferrous sulphate) applied separately. The effect of the mordants was described by XRD, FT-IR, SEM, DSC and TGA techniques. From the obtained results, various bands ratio displayed differences was observed; FT-IR shows a decrease in O-H band intensity; SEM images illustrate that the fabric was firmly woven. Thermal results propose the improvement of the thermal molecular mobility of the cellulose molecules. The evaluation of antimicrobial activity was tested using the modified streak method. The data indicated that the dyed and treated cotton fabrics with ferrous chloride and ferrous sulphate mordants have higher crystallinity indices in agreement with the obtained thermal data and exhibited higher thermal stability as well as expressively altered the morphological structure of cotton fabrics, and imparted a series of functionalities including; antioxidant and antibacterial properties to cotton fabrics.
BEST: International Journal of Humanities, Arts, Medicine and Sciences (BEST: IJHAMS), 2014
Nature is full of fascinating colours and people had been exploiting them for dyeing garments, Ausing them in food and many other items of the daily use. It has been reported by ancient writers that there were at on time nearly thousand natural sources of dyes. There is a consideration demand for eco-friendly products in the global market and it is possible to master the technology of dyeing with natural dyes. In the search for newer natural source for dyes, and attempt has been made to extract dyes from selected gulmohar leaves, and it is applied on linen with pomegranate mordant technique. Effect of dyeing, method of extraction and mordant has been visualized on the colour strength and fastness properties of the dyed samples. In linen, regarding general appearance, the sample dyed with tree leaves using pomegranate mordant with premordanting technique was rated as good. Texture and luster of sample was rated as medium and good respectively. The weight of the sample has maximum increased over the original. Gulmohar tree leaves, dyed with pomegranate as mordant by using pre-mordant technique are maintained the fabric thickness of linen. Linen sample dyed with gulmohar leaves increased the fabric strength. The colour fastness tests of Lenin sample proved that gulmohar leaves had very good light fastness with pre-mordant technique. In general, the sample had good to excellent colour fastness to dry and wet crocking and fair to good colour fastness to washing. Colour not only gives a pleasant look to the substrate, but also expresses emotion and ideas. The knowledge and use of colours began with the drawn of civilization perhaps, but the art of extraction and use of colour was discovered and perfected in India. India had the distinction of being the colour box of the ancient world. People demand coloured textiles for aesthetic appeal for decoration and for utilization purpose also. The colour is achieved through dyeing. In recent years there has been an interest manifested towards natural dyes. The reason being manifold including such as those of ecological movement, bio-degradability and higher compatibility of natural dyes with environment other advantages associated with natural dyes include lower toxity and allergic reactions in relations to synthetic dyes. So, in this study the natural colours are extracted from leaves of gulmohar tree and to apply on textile material with pomegranate mordant. These natural dyes also give some medicinal properties also.
THE EFFECT OF DIFFERENT MORDANTS ON DYEING OF COTTON FABRIC WITH HENNA
International Journal of General Engineering and Technology (IJGET), 2015
The importance of natural dye is increasing day by day to maintain ecological balance. In this experiment we have tried to use natural dyes instead of synthetic dyes. We have also tried to produce different shades by using different mordants. It reveals the technique of dyeing of cotton with Henna (Lawsonia ineremis L.,) leaves, effects of different mordants such as Alum, Potassium dichromate, Cooper sulfate and Ferric chloride on dyeing of cotton fabric with henna and color fastness properties of dyed sample. We have got different shades by using different types of mordants and different techniques of mordanting. The color fastness with respect to rubbing was very good for most of the samples but color fastness to wash was quite satisfactory for most of the samples but some samples showed good color fastness to wash properties.