Optimisation of the colour sequence in the dyeing process: washing the equipment

2005 ◽  
Vol 121 (3) ◽  
pp. 164-168
Author(s):  
F Maldonado ◽  
R Radillo ◽  
G Baldoquin ◽  
A Ruiz
Keyword(s):  
Dyeing Process ◽  
Colour Sequence

Optimisation of the colour sequence in the dyeing process: industrial applications

2000 ◽  
Vol 116 (11) ◽  
pp. 359-362 ◽  
Author(s):  
F Maldonado ◽  
A Ciurlizza ◽  
R Radillo ◽  
E Ponce Leon
Keyword(s):  
Industrial Applications ◽  
Dyeing Process ◽  
Colour Sequence

scholarly journals Investigation into the color stripping of the pigment printed cotton fabric using the ozone assisted process: A study on the decolorization and characterization

2021 ◽  
Vol 16 ◽  
pp. 155892502199275
Author(s):  
Ajinkya Powar ◽  
Anne Perwuelz ◽  
Nemeshwaree Behary ◽  
Le vinh Hoang ◽  
Thierry Aussenac ◽  
...  
Keyword(s):  
Cotton Fabric ◽  
Photoelectron Spectroscopy ◽  
Treatment Time ◽  
Pilot Scale ◽  
Chemical Recycling ◽  
X Ray ◽  
Cellulosic Fibers ◽  
Dyeing Process ◽  
Cellulosic Textiles ◽  
Ozonation Process

Color stripping is one of the most convenient ways to rectify the various shade faults occurred during printing or dyeing process of textiles. But, the conventional chemical assisted process poses serious risk of the environmental pollution. Secondly, the chemical recycling of the cellulosic fibers may be disrupted due to the presence of the impurities like colorants, finishes, and the additives in the discarded textiles. So, there is a need to study ways to remove such impurities from the discarded cellulosic textiles in a sustainable manner. This work examines the decolorization of the pigment prints on cellulosic fabrics at pilot scale using an ozone-assisted process. The effect of varying pH, ozone concentration and the treatment time on the decolorization of the pigment prints was optimized using the response surface methodology technique. The effects of ozonation process parameters on the mechanical properties of cellulosic cotton fabric were measured. Decolorization of pigment printed samples was studied with respect to the surface effects by a scanning electron microscopy (SEM), and the chemical removal effects of ozonation treatment were studied using X-ray photoelectron spectroscopy. The possible mechanism regarding the action of ozone for the decolorization is discussed.

scholarly journals Natural Dyeing of Cellulose and Protein Fibers with the Flower Extract of Spartium junceum L. Plant

Materials ◽  
2021 ◽  
Vol 14 (15) ◽  
pp. 4091
Author(s):  
Zorana Kovačević ◽  
Ana Sutlović ◽  
Ana Matin ◽  
Sandra Bischof
Keyword(s):  
Negative Impact ◽  
Environmentally Friendly ◽  
Future Research ◽  
Wool Fabric ◽  
Dyeing Process ◽  
Protein Fibers ◽  
Wool Sample ◽  
C Value ◽  
Total Difference ◽  
Spartium Junceum

In this study, the natural dye was extracted from Spartium junceum L. (SJL) flowers and applied on cellulose (cotton) and protein (wool) fabric. Fabrics were pre-mordant with alum prior to the dyeing process. Considering the global requirements on zero waste and green policy, the dyeing process was intended to be as much as possible environmentally friendly but still effective. Therefore, mordant concentration was optimized due to the reduction of the negative impact. The efficiency of the dyeing process was investigated by examination of fabrics’ color characteristics and colorfastness to washing properties. In this paper, we have proved that the extracted dye from Spartium junceum L. is an acidic dye (mordant dye) which is more applicable for the treatment of wool fabrics. In this paper, it was proved that phytochemicals responsible for coloring are part of the flavonoids group. The UV absorption spectra of extracted dye show 4 bands in the region of λmax 224, 268, 308 and 346 nm which are ascribed to bands characteristic for flavonoids. Wool fabric pre-mordant with 3% alum and dyed shows great chromatic (C*) properties where C* value is in a range from 47.76 for unwashed samples to 47.50 for samples after 5 washing cycles and color hue (h°) is in a range 82.13 for unwashed samples to 81.52 for samples after 5 washing cycles. The best result regarding the colorfastness properties is shown by the wool sample treated with 3% alum after 5 washing cycles (total difference in color (Delta E*) = 0.87). These results confirm that metal (Al) from alum mordant make strong chemical bonds with wool substrate and dye since Delta E* values decrease in comparison to Delta E* values of the cotton samples treated the same way. The results revealed it is possible to reduce the concentration of mordant up to 3% and obtain satisfactory results regarding the colorfastness. Nevertheless, future research will go in the direction of replacing synthetic mordant with a more environmentally friendly one.

scholarly journals Combination of wet fixation and drying treatments to improve dye fixation onto spray-dyed cotton fabric

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Lina Lin ◽  
Wenju Zhu ◽  
Cong Zhang ◽  
Md. Yousuf Hossain ◽  
Zubair Bin Sayed Oli ◽  
...  
Keyword(s):  
Cotton Fabric ◽  
Reactive Dye ◽  
Fixation Time ◽  
Drying Process ◽  
Combined Treatments ◽  
Fixation Rate ◽  
Dyeing Process ◽  
Textile Dyeing ◽  
Color Uniformity ◽  
Four Levels

AbstractThe conventional dyeing process requires a substantial amount of auxiliaries and water, which leaches hazardous colored effluents to the environment. Herein, a newly developed sustainable spray dyeing system has been proposed for cotton fabric in the presence of reactive dyes, which has the potential to minimize the textile dyeing industries environmental impact in terms of water consumption and save significant energy. The results suggest that fresh dye solution can be mixed with an alkali solution before spray dyeing to avoid the reactive dye hydrolysis phenomenon. After that, drying at 60–100 °C, wet fixation treating for 1–6 min, and combined treatments (wet fixation + drying) were sequentially investigated and then dye fixation percentages were around 63–65%, 52–70%, and above 80%, respectively. Following this, fixation conditions were optimized using L16 orthogonal designs, including wet fixation time, temperature, dye concentration, and pH with four levels where the “larger-the-better” function was selected to maximize the dye fixation rate. Additionally, the color uniformity and wash and rubbing fastnesses were at an acceptable level when both treatments were applied. Finally, the dyes were hydrolyzed after wet fixation, and the hydrolysis percentages were enhanced after the drying process.

Comparison of Dyeing Properties between PPT and PET Fiber

2015 ◽  
Vol 1089 ◽  
pp. 3-6
Author(s):  
Shu Ling Cui
Keyword(s):  
Comparative Study ◽  
Process Parameters ◽  
Dyeing Properties ◽  
Dyeing Process

A comparative study of dyeing properties of PPT and PET fiber is carried out. Experiments show that the K/S value, dyeing up-take, and permeability of PPT fiber are obviously higher than those of PET fiber under the same dyeing conditions. The optimized dyeing process parameters for PPT fiber are temperature 110°C, pH 7, and time 40 min.

Study on the Dyeing Behavior of Wool Fiber Treated with Nano-SiO2/Ag Antibacterial Agent

2011 ◽  
Vol 332-334 ◽  
pp. 27-30 ◽  
Author(s):  
Mei Niu ◽  
Zi Lu Wu ◽  
Jin Ming Dai ◽  
Wen Sheng Hou ◽  
Sheng Shi ◽  
...  
Keyword(s):  
Low Temperature ◽  
Antibacterial Agent ◽  
Important Influence ◽  
Wool Fiber ◽  
Experimental Results ◽  
Ultrasonic Frequency ◽  
Acid Dyes ◽  
Nano Sio2 ◽  
Dyeing Process ◽  
The Impact

Wool fiber was firstly pretreated by nano-SiO2/Ag antibacterial agent, and then dyed with an acid dyes at low temperature by ultrasonic dyeing. Many factors had an important influence on the dye ability and the antibacterial behavior during the dyeing process of antibacterial wool fiber. The experimental results indicate that the dye-takeup rates of antibacterial wool fiber were enhanced with the increase of the concentration of nano-SiO2/Ag, the dyeing temperature, the dyeing time and the ultrasonic frequency (less than 60Hz). However, the antibacterial ratios of wool fiber were declined in the impact of these factors other than the concentration of antibacterial agent.

Laccase-catalyzed enzymatic dyeing of cotton fabrics

2021 ◽  
pp. 004051752110069
Author(s):  
Rıza Atav ◽  
Bürhan Buğdaycı ◽  
Ömer Bozkurt ◽  
Aylin Yıldız ◽  
Elçin Güneş ◽  
...  
Keyword(s):  
Experimental Studies ◽  
Uv Protection ◽  
Infrared Analysis ◽  
Synthetic Dyes ◽  
Protection Factor ◽  
Knitted Fabrics ◽  
Reactive Dyeing ◽  
Dyeing Process ◽  
Laccase Enzyme ◽  
Color Reproducibility

As some synthetic dyes are regarded to be toxic, mutagenic and carcinogenic, the search for eco-friendly alternatives for the synthesis of dyes and coloration has gained importance. For this reason, this study focused on finding new eco-friendly alternatives for coloring cotton. 100% cotton knitted fabrics were subjected to enzymatic coloration using a commercial laccase enzyme and various precursors. After determining the colors, the effect of pH on the enzymatic dyeing process was investigated. Then the optimization of reaction conditions was also realized statistically for the precursors giving the best results in terms of color. With the aim of obtaining further improvements in color-yield values obtained in enzymatic dyeings, the effect of the pretreatment process and the use of ultrasound were also investigated. Furthermore, the reaction pathways in enzymatic coloration were explained and results were confirmed by means of Fourier Transformed Infrared analysis. As a result of experimental studies, red and lilac colors could be successfully obtained on cotton for the first time in the literature. In this way, the theoretical basis of enzymatic dye synthesis and dyeing of cotton was clarified comprehensively. Furthermore, technical (color reproducibility; washing, rubbing, light and perspiration-fastness values; and UV protection factor), economical (chemical, energy and water consumption required for dyeing (including aftertreatments) of 1 kg fabric) and ecological aspects of enzymatic dyeings were compared with reactive dyeing. According to the experimental results it was found that biological treatment alone was enough for wastewater of enzymatic coloring, while chemical treatment will also be needed in reactive dyeing wastewater. Furthermore, color reproducibility, evenness and UV protection properties of dyed samples were comparable with that of reactive dyeings. However, in terms of the fastness levels achieved, the enzymatic coloring was far behind the reactive dyeing.

On the role of tannins and iron in the Bogolan or mud cloth dyeing process

2012 ◽  
Vol 82 (18) ◽  
pp. 1888-1896 ◽  
Author(s):  
Mukta V Limaye ◽  
Zoltán Bacsik ◽  
Christina Schütz ◽  
Aïssata Dembelé ◽  
Mama Pléa ◽  
...  
Keyword(s):  
Dyeing Process

Surface Modification on Polyamide 6.6 with Double Barrier Discharge (DBD) Plasma to Optimise Dyeing Process by Direct Dyes

2010 ◽  
Vol 636-637 ◽  
pp. 846-852 ◽  
Author(s):  
Fernando R. Oliveira ◽  
A.P. Souto ◽  
Noemi Carneiro ◽  
J.H.O. Nascimento
Keyword(s):  
Photoelectron Spectroscopy ◽  
Barrier Discharge ◽  
Microstructural Analysis ◽  
Atmospheric Conditions ◽  
Acid Dyes ◽  
Direct Dyes ◽  
Dbd Plasma ◽  
Double Barrier ◽  
Dyeing Process ◽  
Polyamide 6.6

Dyeing of polyamide fibers is normally made with acid dyes, however, it is somewhat difficult to achieve uniformity and control of pH and temperature must be carefully made. The possibility to dye polyamide 6.6 in a larger gamut of colours with good properties may be achieved using other classes of dyes after plasmatic modifications in textile substrates. Polyamide 6.6 fabrics were treated with Double Barrier Discharge (DBD) plasma obtained at atmospheric conditions in a semi-industrial machine and very positive results were obtained when dyeing is made with direct dyes. Surface modifications were evaluated, namely, roughness in terms of Atomic Force Microscopy, changes in chemical composition by X-Ray Photoelectron Spectroscopy (XPS) and microstructural analysis by SEM. In order to optimize dyeing process, different dye concentrations, pH and temperatures were attempted on dyeing with DBD treated fabrics. Important parameters were studied such as exhaustion, colour strength (K/S) and washing fastness. Chemical and physical effects of plasmatic discharge contribute to excellent results obtained in yield, exhaustion and fastness of dyeing of polyamide with direct dyes demonstrating extensive improvement of dye exhaustion from baths, easily achieving 100% in shorter dyeing times. These results mean less dyes in effluents and less time for dyeing processes. The cleanness of the processes and lower cost of direct dyeing are additional advantages when compared to difficulties in acidic dyeing of polyamide.

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