Plant Dyes Research Articles

The integration and transformative design research of plant dyeing techniques in Dong brocade with sustainable materials

Dong brocade, a fabric renowned for its intricate patterns and ethnic symbolism, has been woven by the Dong people for generations, showcasing their cultural significance. Traditional plant dyeing technology is one of the main aspects of Dong brocade but the documentation and understanding of this is still rather limited. With regard to the use of plant dye in Dong brocade, it is not as well explored as it should be since it has a traditional aspect. The main purpose is to investigate and apply the traditional plant dyeing technique to Dong brocade for the improvement of that sustainable concept and the preservation of cultural assets. Therefore, 121 Dong villagers were interviewed to elicit their awareness regarding prehistoric plant dyeing. By observing the dyeing conditions, this study provided accurate perception and learned how to differentiate between natural and synthetic mordants through ethnobotanical perception. The strategy is intended to integrate sustainable products into Dong brocade, employing orthogonal array development to find the right dyeing conditions for corresponding plant dyes. Research revealed that 8 genera of plants which include 7 species are used in dyeing Dong brocade. The findings presented in this work prove the effectiveness of the use of plant dyes in Dong brocade, showing its advantages with 30% of frequency and CI (Color Index) indices, 8% of them being cultural. 5 for ethnic cultural sustainment, developmental and bio-diversity reasons respectively. The unique integration between the traditional dyeing technique in Dong brocade and the utilization of sustainable resources is very promising for the improvement of identity enhancement and embodiment, and the preservation of the environment.

Cultural Perspectives on the Sustainable Use and Added Value of Plant-Based Food Dyes—A Case Study from Bulgaria

Raised personal health awareness and social environmental responsibility put pressure on the agri-food industry to adopt more sustainable ways of production, including the use of more natural ingredients, reducing waste, conservation and the regeneration of resources and energy. Plant-based colorants are ecologically friendly alternatives to artificial food dyes, especially with regards to the current reports on the adverse effects of some of the latter on human health. Various plants are traditionally used by many cultures to obtain vivid food coloration; however, the knowledge and means to produce them becomes less and less accessible to urbanized societies, and affordable organic alternatives are not always available on the market. An online questionnaire was performed to explore the awareness on plant-based dyes and pro-environmental attitudes of Bulgarian customers through the lens of Orthodox Easter eggs dyeing and the obtaining of plant dyes. From a total of 294 adult participants, only 5% reported a strict preference for natural dyes, while more than half of them (54%) were found to use natural and artificial ones concomitantly or switching between both. Of 45 plant taxa used for egg coloration, 12 were most frequently cited with many new additions of imported plants. Most of the used plant-based dyes were common fruits, spices, herbal infusions and even food waste like onion peels and avocado pits that were readily available from home gardens, markets and food shops. Additionally, we made a review of the scientific literature regarding their antioxidant and antimicrobial activity against food spoilage bacteria and foodborne pathogens isolated from eggs. All frequently used taxa were reported to exhibit antibacterial activities against Gram-positive and Gram-negative bacteria and possess antioxidant activity due to the presence of various polyphenols, essential oils and other compounds. Grape and red wine, roselle and stinging nettle are the species with the most diverse antibacterial activity, effective against 15 out of the 16 bacterial species of spoilage and foodbourn microorganisms included in our focus. The antimicrobial activities, however, were found mostly tested against bacterial strains in vitro, and further studies are needed to confirm their potential antibacterial activity when applied to Easter/boiled eggs or other food products. Our findings suggest that traditional cultural practices, as a multifaceted and engaging phenomenon, have the potential to promote environmental responsibility and a healthy lifestyle using both contemporary and traditional knowledge.

The application of Xinjiang safflower extract on Aidelaisi silk fabric

Purpose This study aims to explore the traditional plant dyeing of Xinjiang Atlas silk fabrics, providing references for the comprehensive utilization of plant dyes in intangible cultural heritage.Design/methodology/approach The focus of this study is on dyeing experiments of Atlas silk fabrics using safflower extracts, constrained by regional resources. Safflower dry flowers grown in Xinjiang were selected, rinsed with pure water and rubbed. Yellow pigments were removed by adding edible white vinegar. Red pigments from safflower were extracted using an alkaline solution prepared with Populus euphratica ash, a special product of Xinjiang. The extraction rate was analyzed under varying material-to-liquor ratios, pH values, times and temperatures. Direct dyeing process experiments were conducted to obtain different colorimetric L, a, b and K/S values for comparison. Samples with good color development were selected to test the impact of dyeing immersions on color development, and their color fastness, UV protection and antibacterial effects were verified.FindingsThe dyeing experiments on silk fabrics confirmed their UV protection capabilities and antibacterial properties, demonstrating effectiveness against E. coli and Staphylococcus aureus. As a major producer of safflower, Xinjiang underscores the significance of safflower as an essential plant dyes on the Silk Road. This study reveals its market potential and suitability for use in the plant dyeing process of Atlas silk, producing vibrant red and pink colors.Originality/valueThe experiments indicated that after removing yellow pigments, the highest extraction rate of red pigment from safflower was achieved at a pH value of 10–11, a temperature of 30°C and an extraction time of 40 min. The best bright red color effect with strong color fastness was obtained with a material-to-liquor ratio of 1:20, a temperature of 40°C and three immersions. The best light pink color effect with strong color fastness was a material-to-liquor ratio of 1:80, a temperature of 30°C and two immersions.

Structure regulation and luminescence improvement of Gd3Ga5O12:Cr3+: An anti-thermal quenching NIR phosphor for multifunctional applications

Near-infrared (NIR) phosphors converted light emitting diodes (LEDs) are booming as next NIR light sources. But the quantum efficiency and thermal stability of the NIR phosphors need to be improved. Here, thermally stable garnet Gd3Ga5O12 is selected as the matrix and Cr3+ as the luminescent center to obtain Gd3Ga5O12:Cr3+ NIR phosphor. Equivalent smaller Lu3+ was adopted to regulate the structure of Gd3Ga5O12 to further improve the luminescence performance. By regulating the structure the emission spectra shift toward blue region and the intensity is improved. Optimized GdLu2Ga5O12:Cr3+ exhibits anti-thermal quenching behavior and the internal quantum efficiency reaches 73.69 %. Relative sensitivity value of the phosphor GdLu2Ga5O12:Cr3+ reaches 3.353 % K−1 at 423 K based on lifetime mode. LED device is fabricated by combining the phosphor GdLu2Ga5O12:Cr3+ and the commercial red phosphor with blue chip. Electroluminescence spectrum can cover the absorption spectra of the plant dyes well. The lettuce grow faster by adopting this LED device as compensating light source. This work provides an anti-thermal quenching NIR phosphor for multiple applications.

Collective Processes in Land Crafting

This article is based on the 3-day workshop, “Botanical Colour Laboratory”, which mapped the colours of the landscape of Osterøy, Norway, through land crafting with natural dyes. Land crafting builds an understanding of, and connection to, the land. This article discusses the multi-sensorial aspects and the relations between humans and non-humans in the process of collective plant dyeing. The terms: situated knowledge, orientations, the unruliness of things, production of locality and mujaawarah (neighbouring) are used to reflect on the workshop and its entangled relationships to matter, landscape, crafting and knowledge. These terms are woven together with the experiences of the “Botanical Colour Laboratory”. The research is conducted as a creative practice with an ethnographical approach. By combining written texts with video and drawings, I have made new multi-modal field notes. These field notes give a glimpse into the multifaceted processes of plant dyeing. The research shows that projects like “Botanical Colour Laboratory” are highly relevant and can influence orientations to our surroundings through collective land crafting processes with our living and non-living neighbours.

Comparative characterizations of plant and mineral dye as potential photosensitizer in Dye-Sensitized Solar Cell

The advent of dye-sensitized solar cells (DSSC) has expansively seen more studies as an alternative to silicon-based and thin-film solar cells due to their simple structure and relatively low production cost. In dye-sensitized solar cells, the dye is one of the major components for high power conversion efficiencies. The extracted dyes were characterized by powder x-ray diffraction, x-ray fluorescence, Scanning electron microscopy, UV-visible spectroscopy, and Gas Chromatography-Mass spectrometry analysis. The structure of the mineral dye contains constituents that enhance better absorption of solar radiation for use in a Dye-Sensitized Solar Cell (DSSC). The calcium and iron content of the mineral dye studied as revealed by the mineralogical analysis done using the powder x-ray diffraction (XRD) and the x-ray fluorescence (XRF) suggest this. These metals serve as bounding complexes to other organic components in the dye, like in the case of Ruthenium complexes dye for efficient absorption of solar radiation, especially in the visible light region. The functional groups present in the dye also confirm what favors good absorption of solar radiation for DSSC application. The Organic chemical compositions present in the mineral dye which were obtained by the Gas Chromatography-Mass spectrometry analysis also confirm the functional groups of carbonyl, Amine, and hydroxyl revealed by FTIR, which were responsible for solar radiation absorption. There are strong absorption narrow bands in the visible region with peaks at around 424 nm (2.903 a.u) and 486 nm (2.973 a.u). Optical band gaps of 1.66 eV and 2.27 eV for the mineral dye and plant dye respectively, were obtained. The properties of the dyes studied give potential substitutes to the relatively expensive ruthenium-based dyes for use in DSSC fabrication.

STAINING EFFECT OF DYE EXTRACTED FROM LEAVES OF Hibiscus rosa-sinensis L., & Tectona grandis L., ON ANGIOSPERMIC STEM TISSUES

Natural dyes are colored compounds present in many plants, including fruits, stems, leaves, bark, and roots. Commercially, these biodegradable dyes were used to color fabrics, pharmaceuticals, cosmetics, leather, and paint. Natural dyes are incredibly advantageous as alternatives to synthetic dyes. The current study examines the extraction of plant dyes from fresh and dry leaves of Tectona grandis and Hibiscus rosa-sinensis with ethanol and water, as well as their efficacy as a stain for angiospermic stem tissues. A 10% w/v crude extract of Tectona grandis and Hibiscus rosa-sinensis fresh and dried leaves in ethanol and water was used to stain the stem cross section of angiospermic plants such Boerhavia chinensis L. (Dicot) and Stenotaphrum secundatum Kuntze (Monocot). The vascular bundle of the angiospermic stem cross section of Boerhavia chinensis was heavily stained with dye derived from Tectona grandis and Hibiscus rosa-sinensis fresh and dried leaves in ethanol, whereas the ground parenchyma was very mildly stained. The dye extracted from Tectona grandis and Hibiscus rosa-sinensis leaves in 10% w/v ethanol stained the sclerenchyma of Stenotaphrum secundatum Kuntze stem cross section more effectively than the parenchyma of Boerhavia chinensis. Within each arterial bundle, xylem cells were heavily stained, although the cortex and medulla were not. This opens up a new avenue for research and additional investigation into improved methods of extracting the dye in concentrated form in a wider range of solvents, as well as better means of generating stains. Keywords – Natural plants dyes, Mordants, Stem Tissues, plant anatomy.

Overview on natural dyes and their IR-spectra – Part II: Indigo containing plant dyes

Overview on natural dyes and their IR-spectra – Part II: Indigo containing plant dyes

Environmentally Friendly Coloration of Polyamide Fabrics with the Use of Natural Dyes: A Study Including Results of Industrial Scale Applications

In recent years, it is seen that there have been many publications on natural dyes in literature. In the studies carried out, one or more plants were taken and the color and fastness obtained with them in the presence of different mordants were examined. Beyond that, functionalities such as odor, antibacterial activity, and UV protection that natural dyes impart to the fabric were examined. However, the important thing that the literature needs is to represent also the results related to the industrial scale production since industry shows high interest to be able to use natural dyes. In this study, seven plant dyes have been used for the coloration of polyamide fabric. The studies have been conducted both on an industrial scale and at the laboratory scale. Based on the statistical analyses, four dyes with the highest color strength and fastness properties including catechu, madder, mulberry leaf, and pomegranate peel were selected for more studies on industrial scale. The results confirmed the good color strength and satisfactory fastness properties against repeated washing, rubbing, water, and perspiration for all selected dyes. The samples dyed with those dyes exhibited excellent protection against UV radiation. The results obtained in this study showed the potential of the selected natural dyes in eco-friendly industrial dyeing of nylon fabric with acceptable fastness properties.

Broadening Color Shade of Dyed Wool Fibre with Binary and Ternary Natural Plant Dye Combinations

ABSTRACT A limited selection of natural dyes’ color impedes the development of textile dyeing with natural plant dyes. Inspiring by the conventional coloration of textiles with a combination of three synthetic dyes generally, the present work is to investigate the broadening color shade of dyed wool fiber with ternary natural dye combinations of madder red (MR), gardenia yellow (GY), and gardenia blue (GB) without mordants in a decamethylcyclopentasiloxane (D5) medium. The wool yarn was wetted in an aqueous solution of pH 3 to own a 300% pickup rate, followed by immersion in a D5 medium containing 2% of alcohol ethoxylate (AEO-3) and solid natural dyes at 90°C for 90 min for coloration. The colorfastness to washing was achieved at a 4–5 for fading and a 5 rating for staining for all colors. The XRD patterns and TGA analysis confirmed that the dyeing procedure did not affect the crystallinity nature and stable thermal tendency. SEM images and cross-sections showed that the dyeing procedure did not damage the morphological structure of the wool fiber surface, and the dyes were evenly distributed. Finally, many color shades of dyed fibers were prepared with various dyes’ ratios.

Investigation of Dyeing Synthetic Fabrics by Using Bacterial Colorants for More Sustainable Textile Production

Polyester and polyamide fibers are the most commonly used textile fibre globally. For this reason, studies conducted on the production and dyeing of synthetic fabrics, especially polyester fabrics, have a significant environmental impact. In this study, it was aimed to put forward a more sustainable way to dye synthetic fabrics. Even if plant dyes are a good alternative for sustainable dyeing in the absence of synthetic dyestuff, the usage amount of plant dyestuffs is high and consistency is low. Bacterial dyeing can be a good alternative for more sustainable synthetic fabric dyeings due to consistent production and free of petroleum-based dyestuffs. Within the scope of this study, 100% polyester and %100 polyamide woven fabric were dyed using 3 different receipts with 3 different bio-colors, the most suitable dyeing methods were determined for both polyester and polyamide fabric. Quality control parameters were checked regarding color depth, washing and rubbing fastness. The findings reveal that polyamide fabrics have higher K/S values compared with polyester fabrics while dyeing with the same receipt and process. pH adjustment and adding salt are necessary to get better results for dyeing pink and brown polyester. Only adding dyestuff to the dyeing bath is enough to dye polyester in blue color. On polyamide fabrics, most suitable dye bath includes salt and pH is 4 to dye pink and brown. But for the blue color, adding salt and adjusting pH to 4 gives better results in polyamide fabric.

Is Gold Yellow? Plant Dyes and Gold-Making in the Ancient Chemical Arts

Ancient Greek colour terminology captures brightness, light, and brilliance rather than clear-cut portions of the chromatic spectrum, as scholars agree today. This also applies to the rich semantic of yellow, which we investigate starting from a philosophical and theoretical perspective. We then shift our focus to Graeco-Roman technical writings dealing with alchemical dyes, cosmetics, and other crafts that made use of the same set of ingredients and colouring substances. We compile a complete list of yellow-dyeing plants used in antiquity, which will update and enlarge the lists currently available in secondary literature on the topic, such as the seminal catalogue by Robert J. Forbes. Drawing on these data and on laboratory reconstructions, we address two main questions. First, which shades of yellow were usually associated with the colour of gold, and how were these tints produced by ancient craftsmen and alchemists? And second, how did these procedures contribute to the ancient discourse on the colour of gold and its artificial reproduction?

Zero-Waste Plant Dyeing: A Feasibility Study on Utilizing Agricultural Waste for Sustainable Textile Production in the Lingnan Region

This research delves into the zero-waste plant dyeing concept, emphasizing the utilization of agricultural waste for dyeing materials to curtail expenses and foster a sustainable natural cycle. The study's objective is to innovate product designs using plant dyes and agricultural waste in a zero-waste dyeing framework. The Lingnan region, renowned for its traditional textile dyeing methods, serves as a case study to assess the dyeing method's efficacy through experiments. The agricultural waste materials encompass crop residues, fruit peels, shells, and more, which are used alongside traditional plant dyes for dyeing various textiles. The textiles are then evaluated on color fastness, intensity, and other dyeing attributes. The findings indicate that agricultural waste dyes are not only sufficient but also yield results that are on par with or surpass those of traditional plant dyes. The adoption of zero-waste plant dyeing not only reduces costs but also supports a circular economy through a closed-loop system. The research concludes that zero-waste plant dyeing is viable in the Lingnan area for creating sustainable product designs, minimizing waste, and reducing costs. The dyeing experiment offers significant insights into the efficiency and effectiveness of agricultural waste as dyeing materials, underscoring the sustainability of this approach for textile production.

Red Dyes from West to East in Medieval Europe: From Portuguese Manuscript Illuminations to Romanian Textiles

Red is the color par excellence, its symbolism being linked with protection and magic through its primary attributes, fire and blood. It was the predominant color from the earliest times, certainly during the Greek and Roman periods and into Medieval Europe, until blue became a competitor around the 13th century. Mineral pigments, like iron oxides, were the first red sources, used to draw lines, dots, or spots on cave walls or stones. Later, other mineral red pigments were also exploited: Cinnabar, natural mercury sulfide, since the Neolithic, and realgar, arsenic trisulfide, in Ancient Egypt. Scientific investigation revealed that, although inorganic pigments were mainly used in painting, iron oxides and cinnabar were also the first available sources for coloring textiles. Plant dyes have been known since the Neolithic, exploited by people living in climatically mild areas rich in vegetation. Their use is strongly connected with two other fundamental textile processes: Spinning and weaving. Scholarly literature indicates Egyptian privet (henna, Lawsonia inermis) as the oldest red vegetal source used. Although widely known as a source of brown, the dried leaves, when powdered and treated with lime water, yield an intense orange red, which is efficient for dyeing the body — skin and hair — and textiles of animal origin. Madder (Rubia tinctorum or relatives) was the first dye to be reported from archaeological European Bronze and Iron Ages textiles preserved in the Hallstatt salt mines, Scandinavian bog sites, and other European burials. Apart from madder, the most widely appreciated red dye sources in the European Classical period were kermes (Kermes vermilio and K. ilicis), purple (species of sea snails from the Muricidae family), and extracts of red tree resins, as dragon’s blood (e.g. Dracaena draco, Dracaena cinnabari, and Daemonorops draco). These sources were used for textile dyeing and as organic pigments in paintings.

草木染环保卡牌游戏设计与应用

草木染环保卡牌游戏设计与应用

ANALISA ANTOSIANIN PADA SEDIAAN MINUMAN EFFERVESCENT SARI BUNGA TELANG (Clitoria ternatea) DAN JERUK RIMAU GERGA LEBONG (Citrus nobilis sp.) MENGGUNKAN METODE pH DIFERENSIAL

Anthocyanin is a compound that forms natural dyes in plants to give color.Telang flowers are one of the plants that contain anthocyanin compounds that are beneficial for health in the body and swallowed flowers can also be made in practical dosage forms, such as effervescent drink preparations. This effervescent drink is also combined with gerga lebong lime which will produce a fresher taste. This study aims to determine the content of anthocyanin compounds in processed effervescent drinks. In this study, the identification of anthocyanins in effervescent beverage preparations, telang flower juice and oranges gerga lebong using qualitative test methods using HCl 2M and NaOH 2M reagents, while in quantitative tests using UV-Vis spectrophotometry,differential pH method with pH 1.0 and pH 4.5 solutions at wavelengths of 510 nm and 700 nm. The results of the qualitative test showed that all samples of processed effervescent drinks were positive for anthocyanins and the quantitative testesults showed that the anthocyanin levels in formulation 1 were 1,780 mg / L, formulation 2 was 2,225 mg / L, and formulation 3 was 5,899 mg / L. Based on this study on effervescentbeverage formulation 3 had high anthocyanins from formulations 1 and 2.

Identification, extraction, and application of orange peel color extracts for silk fabric coloration

Under-utilized orange peel waste contains natural colorants that might be used for textile dyeing. Research into orange peel waste as natural colorants provides benefits for both the agricultural and fashion industry with a creative and sustainable solution. This research performed the extraction of colorants from the orange peel as plant dyes and investigated their potential dyeing capability of silk fabrics. With full factorial analysis, we determined the optimal extraction conditions by comparing 100 % ethanol, 70 % ethanol, and water, aiming to achieve the highest absorbance for the extracted solution. Conditions obtained with the best performance include an extraction temperature of 60 °C, an extraction time of 120 min, and a material-to-liquor ratio of 1:20 (wt/vol) for both 100 % and 0 % ethanol. To attain the highest K/S values on textiles with orthogonal experimental design, the optimal dyeing profiles of silk fabrics with water solution were found to be 100 °C, 60 min, pH 3, and Liquid Ratio of 1:15. Colorfastness results of crocking, washing, and sunlight are in favor of the usage of orange peel color extracts for textile application.

First dye identification analyses conducted on textiles from Old Dongola (Sudan, 17th–18th centuries CE)

AbstractThe Middle Nile Valley offers exceptional environmental conditions that allow the preservation of organic materials, including textiles. This paper presents the results of the analysis of 17 samples collected from wool, cotton, and silk textiles excavated in the ancient capital of Old Dongola from layers dated to the 17th and 18th centuries CE. Chemical analysis using high performance liquid chromatography coupled with mass spectrometry (HPLC‐MS/MS) have identified both plant and animal dyes. Locally produced textiles, mostly from wool and decorated with blue, green, orange, and yellow hues, were dyed with woad (Isatis tinctoria), flavonoid plants, and madder‐type roots, which were already known and used by medieval dyers in that area. For the first time, kermes (Kermes vermilio) and lac‐dye (Kerria species) have been also identified as a dye source in samples from this group. Imported fabrics, of cotton and silk, were dyed blue with woad (I. tinctoria) but also with indigo (Indigofera tinctoria); dyer's broom (Genista tinctoria) and kermes (K. vermilio) were other dyes identified in this second group. The results of this study provide the first dye identification for textiles produced in the 17th–18th c. Sudan and contribute new data to the research on textile production and trade in post‐medieval Sudan.

Study of amur cork tree bark extract-dyed paper under artificial UVA irradiation

Some ancient Chinese paper artifacts dyed with amur cork tree bark extracts are currently preserved to different extents in museums and libraries worldwide. As traditional natural plant dyes, the long-term performance of the amur cork tree bark extract-dyed handmade paper has been questioned under a preserved environment. The photodegradation process of the extract-dyed papers was examined under accelerating artificial UVA irradiation conditions according to China national standard-paper and board- accelerated aging (exposure to light). Changes during aging were analyzed by optical observation and scanning electron microscopy (SEM), X-ray diffraction (XRD), thermogravimetric analysis (TGA), Fourier transform infrared spectrometry (FTIR), pH, and tensile strength and folding endurance tests. The results showed that the main components from extracted dyes played an important role in affecting the photodegradation properties of dyed paper. The changes in surface color, pH, morphology and mechanical properties after the artificial UVA accelerated degradation tests revealed that a suitable concentration of the extract dyes for maintaining the long-term irradiation stability of the paper is important.

Green fabrication of inkjet printed antibacterial wool fabric with natural gardenia yellow dye

The application of chemical synthetic dyes causes serious environmental pollution and high energy consumption. Natural plant dyes have become the most promising alternative in textile printing and dyeing processing with lower carbon emission. In this work, the properties of water-soluble gardenia yellow natural dye in inkjet printing of wool fabrics were studied in detail. The results of multiple light scattering showed that the gardenia yellow dye ink had high stability. The surface tension and viscosity of the ink can be adjusted by polyol-based organic solvents to obtain a stable droplet morphology. The influence mechanism of sodium polyacrylate sizing agent and polyol solvent on color depth and contour clarity of printing pattern have been deeply studied. After tannic treatment, gardenia yellow inkjet printed wool fabric can obtain satisfactory color fastness. At the same time, gardenia yellow dye endowed wool fabrics with good antibacterial property, and the antibacterial rate against S. aureus and E. coli can exceed 95%. In this study, both inkjet printing and color fixing process are green and non-pollution, which provides an idea reference for the production of natural green antibacterial textiles.