Search

This paper investigates the feasibility of dyeing viscose rayon fabric with an anthocyanin solution extracted from H. sabdariffa L. calyces. For eco-friendly dyeing and improvement of the natural dye’s affinity to fabrics, natural mordants instead of traditional metallic mordants were applied. The effect of natural mordant types and mordanting procedures (pre-, meta- and after-mordanting) was evaluated by colorimetric measurement (CIE Lab and K/S values) and color fastness. Four natural mordants including alginate, walnut hull, lemon peel, and pinecone were used. The results show that the light and wash fastness (1–2 degrees according to the blue scale and the grayscale) of the un-mordanted viscose fabric were very low and unsuitable. Natural mordants, especially walnut husk and alginate, could improve color strength and color fastness. The light fastness value of the dyed fabric was improved, reaching a value of 5–6 in the presence of walnut, lemon, and pinecone mordants. The highest wash and light fastness was obtained when the after-mordanting method was used. Also, the use of walnut husk mordant increased the color strength and decreased the lightness of the dyed fabrics, as compared to other natural mordants, in all three methods of mordanting.

Although natural fibers used to be colored with natural dyes, today they have been replaced by chemical dyes and our cultural values have been abandoned. Metal salts harm both the nature and the human beings more than synthetic dyes do. This study examines the effects of both natural and chemical mordants on dyeing as well as the use of natural dye obtained from Sambucus Ebulus L. plant for dyeing Hemp fabric. In this study 100% hemp fabric was dyed with 15 different concentrations of 3 different mordant substances one of which was natural. Lightfastness and washing features of dyed hemp samples were done then color differences and color efficiency calculated by CIE L*a*b color space system were compared. For the optimization of dyeing parameters Grey Relational Analysis (GRA) method was used. Being one of the multi-criteria decision-making methods, GRA is the alternative and the most effective approach that can be employed in case of insufficient or discrete information, too much data, and vagueness. Experimental results show that the use of the natural mordant in dyeing the hemp fabric with Sambucus Ebulus L. plant gives better results in terms of color difference and color efficiency.

The textile industry is one of the most complex sectors, in terms of the materials and chemical processes used from petroleum and the environmental degradation during its production and disposal. It is therefore a sector looking for new possibilities and for more sustainable materials and applications. One option is to use natural dyes, as they are considered biodegradable, do not pollute the environment, and have potential use for many sectors, including the fashion industry. In this study, Alanya silk was dyed by a natural dyeing method with crocus sativus, Helichrysum arenarium, and Glycyrrhiza glabra L., plants that grow in and around the Alanya region. Quercus aegilops L. grown in the region was preferred as mordant, a natural binder, and is one of the plants with the highest tannin content, and it was used with a more environmentally friendly and sustainable approach to increase the binding in natural dyeing instead of chemical mordants. The aim is to provide an environmental and scientific contribution to the dyeing producers in this region. According to the MAUT (Multi-Attribute Utility Theory) method, the best dyes in terms of fastness and color efficiency were determined as the dyes made with the Glycyrrhiza glabra L. plant. [ABSTRACT FROM AUTHOR]

This paper investigates the feasibility of dyeing viscose rayon fabric with an anthocyanin solution extracted from H. sabdariffa L. calyces. For eco-friendly dyeing and improvement of the natural dye's affinity to fabrics, natural mordants instead of traditional metallic mordants were applied. The effect of natural mordant types and mordanting procedures (pre-, meta- and aftermordanting) was evaluated by colorimetric measurement (CIE Lab and K/S values) and color fastness. Four natural mordants including alginate, walnut hull, lemon peel, and pinecone were used. The results show that the light and wash fastness (1-2 degrees according to the blue scale and the grayscale) of the un-mordanted viscose fabric were very low and unsuitable. Natural mordants, especially walnut husk and alginate, could improve color strength and color fastness. The light fastness value of the dyed fabric was improved, reaching a value of 5-6 in the presence of walnut, lemon, and pinecone mordants. The highest wash and light fastness was obtained when the aftermordanting method was used. Also, the use of walnut husk mordant increased the color strength and decreased the lightness of the dyed fabrics, as compared to other natural mordants, in all three methods of mordanting. [ABSTRACT FROM AUTHOR]

Although natural fibers used to be colored with natural dyes, today they have been replaced by chemical dyes and our cultural values have been abandoned. Metal salts harm both the nature and the human beings more than synthetic dyes do. This study examines the effects of both natural and chemical mordants on dyeing as well as the use of natural dye obtained from Sambucus Ebulus L. plant for dyeing Hemp fabric. In this study 100% hemp fabric was dyed with 15 different concentrations of 3 different mordant substances one of which was natural. Lightfastness and washing features of dyed hemp samples were done then color differences and color efficiency calculated by CIE L*a*b color space system were compared. For the optimization of dyeing parameters Grey Relational Analysis (GRA) method was used. Being one of the multi-criteria decision-making methods, GRA is the alternative and the most effective approach that can be employed in case of insufficient or discrete information, too much data, and vagueness. Experimental results show that the use of the natural mordant in dyeing the hemp fabric with Sambucus Ebulus L. plant gives better results in terms of color difference and color efficiency. [ABSTRACT FROM AUTHOR]

Of late, dyeing fabrics with natural dyes have become an attraction because of its eco-friendly and less threatening disposition towards humankind. In the textile colouration industry, natural dyes play an important role because of the need for replacement synthetic dyes which have a great deal of tension with the environmental issues. This study focuses on the colour shade, colour coordinates, and fastness properties of dyed silk fabric from tagetes erecta (Mexican Marigold flower) using the water boiling extraction method. The dyeing was carried out using lemon juice as a natural mordant through the simultaneous mordanting method, using two different dyeing methods: infrared (IR) dyeing and exhaustion dyeing. The shades produced for exhaustion dyed fabric is light-yellow compared to the IR dyed fabric, which is medium-light yellow. These shades were confirmed with the CIELAB colour coordinates, L*a*b* values. The colourfastness to washing, perspiration, rubbing, and light of the fabrics were conducted to investigate the performance of the dye and mordant on the dyed silk fabrics. The colourfastness properties of the dyed silk fabric using infrared (IR) dyeing technique have better performance than using exhaustion dyeing technique.

The proposed work, aims to provide a "green" and cutting-edge technique for the mordanting and dyeing of polyester fabric with natural henna dye using the advanced technology of micro waves. For providing a complete "green" and ecofriendly dyeing process, lemon was used as a natural bio mordant with micro waves and results were compared with conventional mordanting method followed by the natural henna dyeing of polyester fabric with microwave. Color properties were analyzed in detail. Scanning electron microscope (SEM), WIDE ANGLE X-RAY DIFFRACTION (WAXD) and Fourier transform infrared spectrometer (ATR-FTIR) studies provide the details of surface and structural changes induced by microwave lemon mordanting and henna dyeing of polyester. Microwave technique clearly reduced the mordanting and dyeing time upto 60–65% with improved fixation and color characteristics. [ABSTRACT FROM AUTHOR]

Copyright of Wool Textile Journal is the property of National Wool Textile Science & Technology Information Center and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

In order to study the influence of natural mordant on dyeing performance of gallnut wool fabric, plant dyestuffs of gallnut was extracted by decoction method, and cold mineral water of ferrosiliceous bicarbonate hydrochloric acid was used as natural mordant. The single factor experiments of related influencing factors were carried out, and the changing rules of influencing factors on color characteristic were analyzed and summarized. The results showed that the dyeing process, the mass fraction of natural mordant, the pH value of dye solution and the number of dyeing times had certain effects on the color characteristic value, among which the dyeing process > the mass fraction of natural mordant > the number of times of dyeing > the pH value of dye solution. The optimum process of gallnut wool fabric co-mordant dyeing with natural mordant is as follows: bath ratio 1 :30, dyeing time 30 min, mordant dyeing time 15 min, dyeing temperature 80 °C, dyeing liquid mass fraction 100% ( pH value 6 during pre-heating), natural mordant mass fraction 100%. By increasing the number of dyeing, the color depth can be increased, and the optimal number of dyeing is 5 times. [ABSTRACT FROM AUTHOR]

The waste management subject is a very important issue today and in the future. Therefore, lots of scholars are endeavoring to investigate the valorization of wastes from different sources, such as paper, metal, glass, and vegetables. In this study, the pistachio soft and hard shells, as an industrial waste material, were used as natural dye sources. For this purpose, waste were collected from Gaziantep province in the south of Türkiye. Then, the soft and hard pistachio shells that had been dried in the shadow were investigated in terms of FTIR analysis and then used as a dyestuff source in the dyeing of cotton fabrics with the help of bio-mordants and metal mordants. Additionally, the antioxidant capacity of the soft and hard shell of pistachio was assessed through the DPPH and FRAP assay methods, and the antibacterial activities were tested against Staphylococcus aureus and Escherichia coli for selected dyed samples. A spectrophotometer was used to determine the CIE L*a*b* color values and (K/S) of cotton fabrics that had been dyed. The results exhibited that the tested wastes could be useful for the coloration of the cotton fabrics, and depending on the used natural dye source, mordanting agent, and mordanting method, the colors were found to have changed, but in general, light brown-ecru-brown colors were observed in the dyed samples. Meanwhile, the fastness of the samples was examined, and the sources were found to exhibit limited light fastness values but good or perfect washing, rubbing, and perspiration fastness. In conclusion, the evaluated conditions were found to be useful for the coloration of cotton, and even more importantly, the pistachio soft and hard shells were observed to reveal great potential for use in textile dye houses as a natural dye source. [ABSTRACT FROM AUTHOR]

Tamarind seed coat tannin was extracted and its tannin class was determined. The extracted tannin was employed as a natural mordant alone and in combination with metal mordant namely copper sulphate for cotton, wool and silk fabrics and dyed using natural dyes namely turmeric and pomegranate rind. The colour strength, colour coordinates, wash and light fastness were evaluated and compared for all the three fabrics with and without mordanting. The pre-mordanted fabrics on dyeing gave better colour strength, wash and light fastness than those dyeing obtained without mordanting. The total phenolic content of the extract was calculated and minimum inhibition concentration was 1% against both the Staphylococcus aureus and Escherichia coli bacteria. The mordanted and dyed fabrics resulted in good antibacterial activity up to 20 washes, when natural mordant was used along with 0.5% and 1% copper sulphate mordant and dyed with natural dyes.

In this study, natural dyes were extracted from five plants, namely diospyros kaki, dioscorea cirrhosa, millettia ( jixueteng), ecliptae, and macrocarpa nucuma, using environmentally-friendly solvents, including ethanol and deionized (DI) water. A plant mordant, tannin extracted from Emblica officinalis G., and a metal mordant, copper sulfate, were used in the pre-dyeing process. Cotton and silk fabric samples were treated using the five natural dyes without and with mordanting for comparison on their color strength and characteristics as well as protection against ultraviolet radiation (UVR). Results revealed that Emblica officinalis G. had the highest total phenol content, followed by dioscorea cirrhosa. The presence of abundant phenolic groups in the natural dyes and mordant makes them effective coloration agents for fabrics. Cotton and silk fabrics dyed using ecliptae without pre-mordanting had the highest K/ S values. Silk fabrics had higher K/ S values than cotton fabrics, indicating greater color strength in pre-mordanted silk treated with DI water-extracted dyes. Natural mordant used before treatment with natural dyes contribute to significant enhancement in color strength, and Emblica officinalis G. alone could darken the color of cotton and silk fabrics dyed with plant pigment. Moreover, treatment with natural dyes after mordanting can increase ultraviolet protection factor (UPF) and the enhancement in UVR protection is greater and more significant in cotton fabrics than in silk fabrics, and in fabrics treated with DI water-extracted natural dyes than in those treated with ethanol-extracted ones. In conclusion, pre-dyeing with natural mordant followed by treatment with natural dyes extracted using environmentally-friendly solvents can enhance significantly K/ S and UPF, offering directions for manufacturing textiles without environmental hazards but with good appearance and health benefits. [ABSTRACT FROM AUTHOR]

Commercial natural dyes are quite costly as manufacturers are to follow multi-step extraction and purification procedures for standardisation purposes. Upon cost comparison, they lose in the market to synthetic dyes. However, in the handicraft sector, reproducibility may be of lesser importance against cost. In the present study, a domestic method of dyeing silk with the aqueous extract of raw plant/tree components (flower, leave, bark and root) by using a natural mordant and alum will be described. Good dyebath exhaustion and washing and light fastness are observed for some of the natural colouring matters. [ABSTRACT FROM AUTHOR]

Tamarind seed coat tannin was extracted and its tannin class was determined. The extracted tannin was employed as a natural mordant alone and in combination with metal mordant namely copper sulphate for cotton, wool and silk fabrics and dyed using natural dyes namely turmeric and pomegranate rind. The colour strength, colour coordinates, wash and light fastness were evaluated and compared for all the three fabrics with and without mordanting. The pre-mordanted fabrics on dyeing gave better colour strength, wash and light fastness than those dyeing obtained without mordanting. The total phenolic content of the extract was calculated and minimum inhibition concentration was 1% against both the Staphylococcus aureus and Escherichia coli bacteria. The mordanted and dyed fabrics resulted in good antibacterial activity up to 20 washes, when natural mordant was used along with 0.5% and 1% copper sulphate mordant and dyed with natural dyes. [ABSTRACT FROM AUTHOR]

Abstract: Ultraviolet radiation (UVR) blocking properties of textiles depend on fibre type, fabric construction and nature of finishing chemicals. Natural dyes can provide vegetable fibres with strong colours if mordants are used. In this study UV protection properties of dyeing extracts from Mediterranean flora (Helichrysum italicum Roth, Rubia peregrina L., Daphne gnidium L., Lavandula stoechas L., Cynara scolymus L.) were tested in combination with fabrics made of vegetable fibres (cotton and flax) and different types of mordants (potassium alum and chestnuts tannins). Pre- and post-dyeing solutions were analyzed quali-quantitatively by HPLC/DAD/ESI-MS in order to calculate the dye uptake on fabrics during the dyeing process. UVR transmittance of fabrics was measured using a spectrophotometer equipped with an integrating sphere. After the dyeing process only flax fabrics mordanted with alum and dyed with Lavandula and Rubia, and flax fabrics mordanted with tannin and dyed with Rubia and Helychrysum reached the minimum protection level. A very good protection level was reached by flax mordanted with alum and dyed with Helychrysum. Chestnut tannins provided a slight support in phenols uptake for Lavandula and Helichrysum plant dyes with respect to potassium alum, but without an improvement of the fabrics UV protection properties; flax samples dyed with Helichrysum extract showed an improvement in UV protection properties when mordanted with potassium alum instead of tannins. Colour fastness and the persistence of UV protection characteristics were also tested after light/sun exposure and after several washes. [Copyright &y& Elsevier]

Although madder ( Rubia tinctorum) has been used as a well-known natural textile dye source for dyeing of natural fibers such as wool, silk and cotton, 100 % polyester dyeing with madder is not common. In this study, polyester samples were dyed with madder at different dyeing temperatures, from 60 °C to 130 °C, in company with 7 chemical and 5 natural mordants. Color properties and rub, light and wash fastness performances were investigated. Different shades of orange, brown, pink and reddish green colors were obtained. Dyeing at 130 °C exhibited the highest color yield, the highest chroma and the lowest lightness values. Overall, chemical mordants exhibited higher color yields than natural mordants. High wash fatness, moderate light and rub fastness levels were observed. The potassium bitartrate and gallnut, a natural mordant, exhibited the best results. The madder dyeing of polyester should be carried out at hot temperature conditions, 130 °C, in order to obtain the highest achievable color yield and chroma with the highest light and wash fastness properties. [ABSTRACT FROM AUTHOR]

Abstract: The safest protection from ultraviolet (UV) radiation exposure is offered by textiles including various apparels, accessories such as hats and shade structures such as umbrellas. Their protectiveness depends on fabric composition, (natural, artificial or synthetic fibres), fabric construction (porosity, weight and thickness) and dyeing (natural or synthetic dyes, dye concentration, UV-absorbing properties, etc.). In this study the UV-protection properties were investigated on fabrics made of vegetable fibres (cotton, flax, hemp and ramie), with different construction parameters (drapery and apparel fabrics), dyed with some of the most common natural dyes. The effect of a tannins-based mordant (the galls of Quercus infectoria) on UV-protection capacity was also tested. UV radiation transmittance of fabrics was measured by two methods: one based on the utilisation of a spectrophotometer equipped with an integrating sphere (in vitro test), and the other based on outdoor measurements taken by a spectroradiometer. Transmittance measurements were used to calculate the Ultraviolet Protection Factor (UPF). Our results revealed that thick and dense (cover factor, CF > 94%) drapery fabrics made of vegetable fibres usually showed good UV-protection levels even if undyed. The use of the tannins-based mordant increased, even without dyeing, the UV-protection level up to the very good and/or excellent protection categories when fabric construction was suitable. Dyeing did not further increase the protection level. Lighter fabrics, usually used for apparel, even showed high UV-protection level after just dyeing, provided that CF was above 94%. Taking into account the high concentrations of dyes used in the present work and the utilisation of mordants containing tannins, slight differences in UV-protection capacity were detected among natural dyes tested and between the two different methods of transmittance measurement. However, UV-protection category defined from outdoor measurements was often higher than that calculated by the in vitro test, indicating an underestimation of the actual protection level of tested fabrics assessed by the latter. [Copyright &y& Elsevier]

Emblica officinalis G. dried fruit tannin was extracted and applied as a natural mordant alone and in combination with metal mordant namely copper sulphate for dyeing on cotton and silk fabrics using natural dyes. The color strength, color-coordinates, wash and light fastness were also evaluated for cotton and silk fabrics with and without mordanting. The pre-mordanted cotton and silk fabrics on dyeing gave better color strength, wash and light fastness than those dyeing obtained without mordanting. The total phenolic content of the extract was calculated. Cotton and silk fabrics resulted in good antibacterial activity using the Emblica officinalis G. mordant. When mordant was used along with 0.5 and 1 % copper sulphate mordant and the activity enhanced and was active up to 20 washes. [ABSTRACT FROM AUTHOR]

[Display omitted] • Dyeing hemp with a natural yellow colorant from Buddleja officinalis. • Comparative research between natural mordants and metallic ones under different mordanting methods. • Expanded environmental-friendly dyeing based on ethnobotanical application. • Provided a case study is to explore new natural dyes for textile industry through ethnobotanical insight. Natural dyes are more eco-friendly alternatives to synthetic dyes. This research focuses on natural dyes and improved dye craft using plants employed by various ethnic groups in Southwestern China. In this study, we assessed the suitability of dried extracts from Buddleja officinalis flowers for dyeing hemp fabric. and valuated indicators including color strength (K / S), color characteristics, and fastness properties in response to washing, rubbing, and perspiration using metallic and natural mordants under pre-, post-, and simultaneous mordanting conditions. Specifically, we investigated the pigment compound crocin by ultraviolet-visible spectroscopy and Fourier transform–infrared spectroscopy analysis before using it to dye hemp fabric. Optimum dyeing conditions including staining temperature, staining duration, and pH have been identified using an orthogonal array experimental design. Optimum results were achieved when dyeing at pH 5, and at 60 °C for 90 min. Hemp fabric dyed without mordant had a shade of yellowness, while fabric mordanted with gum rosin, plant ash, KAl(SO 4) 2 , and Chaenomeles speciosa had a variety of pale to dark yellowness color shades. A darker yellow–green color shade was obtained with FeSO 4 mordant. The color change of washing fastness was mostly very poor, while the color stain of washing and perspiration fastness were good to excellent, and rubbing fastness was also good to excellent. The color fastness was kept and improved by the three natural mordants, especially gum rosin and plant ash, but reduced by FeSO 4. Those results show that the use of aqueous extract from B. officinalis flowers combined with natural mordants represents a promising approach for textile dyeing, revealing an alternative method that could improve and extend the dyeing properties of this indigenous dye plant. In addition, our findings lay the foundation for further basic studies and demonstrate the utility of preserving natural dye plants, along with the related traditional knowledge of indigenous groups in Yunnan, China. [ABSTRACT FROM AUTHOR]