Natural Dyes Research Articles

Effect of pH and temperature on the stability of the natural dye from the roselle flower (Hibiscus sabdariffa L.) and its application in flavored milk

Effect of pH and temperature on the stability of the natural dye from the roselle flower (Hibiscus sabdariffa L.) and its application in flavored milk

Ancestry and sustainability: industrializing Tie-Dye with natural dyes in the Tunisian textile sector

Ancestry and sustainability: industrializing Tie-Dye with natural dyes in the Tunisian textile sector

Mixtures of Natural Functional Dyes in Finishing and Coloration of Natural Fabrics

Mixtures of Natural Functional Dyes in Finishing and Coloration of Natural Fabrics

Estimation for Raw Material Plants of a Henna Product Using LC-High Resolution MS and Multivariate Analysis.

Henna is a plant-based dye obtained from the powdered leaf of the pigmented plant Lawsonia inermis, and has often been used for grey hair dyeing, treatment, and body painting. As a henna product, the leaves of Indigofera tinctoria and Cassia auriculata can be blended to produce different colour variations. Although allergy from henna products attributed to p-phenylenediamine, which is added to enhance the dye, is reported occasionally, raw material plants of henna products could also contribute to the allergy. In this study, we reported that raw material plants of commercial henna products distributed in Japan can be estimated by LC-high resolution MS (LC-HRMS) and multivariate analysis. Principal Component Analysis (PCA) score plot clearly separated 17 samples into three groups [I; henna, II; blended henna primarily comprising Indigofera tinctoria, III; Cassia auriculata]. This grouping was consistent with the ingredient lists of products except that one sample listed as henna was classified as Group III, indicating that its ingredient label may differ from the actual formulation. The ingredients characteristic to Groups I, II, and III by PCA were lawsone (1), indirubin (2), and rutin (3), respectively, which were reported to be contained in each plant as ingredients. Therefore, henna products can be considered to have been manufactured from these plants. This study is the first to estimate raw material plants used in commercial plant-based dye by LC-HRMS and multivariate analysis.

Traditional Fish Leather Dyeing Methods with Indigenous Arctic Plants

Along the Arctic and sub-Arctic coasts of Alaska, Siberia, north-eastern China, Hokkaido, Scandinavia and Iceland, people have dressed in clothes or worn shoes made of fish skin for millennia. (Within this article, the terms fish skin and fish leather are used to indicate different processes of the same material. Fish skin: Skin indicates the superficial dermis of an animal. Fish skin is referred to as the historical raw material that is tanned following traditional methods such as mechanical, oiling and smoking tanning, using materials such as bark, brain, urine, fish eggs and corn flour. Fish leather is used to refer that the fish skin has passed one or more stages of industrial vegetable or chrome tanning production and is ready to be used to produce leather goods). These items are often decorated with a rich colour palette of natural dyes provided by nature. In this study, minerals and raw materials of plant origin were collected from riverbanks and processed by Arctic seamstresses who operated as designers, biochemists, zoologists, and climatologists simultaneously. During our research, an international team of fashion, tanning and education specialists used local Arctic and sub-Arctic flora from Sweden, Iceland, and Japan to dye fish leather. Several plants were gathered and sampled on a small scale to test the process and determine the colours they generated based on the historical literature and verbal advice from local experts. This paper describes the process and illustrates the historical use of natural dyes by the Arctic groups originally involved in this craft, building on the traditional cultural heritage that has enabled us to develop sustainable dyeing processes. The results are promising and confirm the applicability of these local plants for dyeing fish skins, providing a basis for a range of natural dye colours from local Arctic flora. The aim is to develop a moderate-sized industrial production of fish leather in this colour palette to replace current unsustainable chemical dyeing processes. This project represents an innovation in material design driven by traditional technologies, addressing changes in interactions between humans and with our environment. The results indicate that new materials, processes, and techniques are often the fruitful marriage of fashion and historical research of traditional methods, helping the industry move towards a more sustainable future.

Natural Dyeing of Cotton, Wool and Viscose Fabrics with Sodium Copper Chlorophyllin

This study investigates the optimal dyeing concentrations of cotton, wool, and viscose fabrics with sodium copper chlorophyllin (SCC). Using SSC above the optimal concentration increases the amount of SCC in the wastewater, which is a disadvantage. Pre-finished 100% cotton, wool and viscose 1 x 1 rib knitted fabrics were dyed with varying SCC concentrations. Optimal dyeing concentrations were determined using UV-Vis spectrophotometry, showing dye absorption decreasing as SCC concentration increases. Equilibrium was reached at approximately 7 ml/L for cotton and viscose, and 3 ml/L for wool. Color measurement values and K/S values of the dyed samples were obtained according to the CIELab color system. The K/S values of dyed cotton, viscose, and wool fabrics rose as the concentration of SCC increased, reaching a peak at 9 ml/L for viscose and 12 ml/L for cotton and wool. Rubbing and perspiration fastness were rated good to excellent.

Bioprospecting Hypoxylon fendleri for pigment production and assessment of its dyeing efficacy on silk fabric

Fungal dyes are promising natural source of pigment for the textile industry due to their environmentally friendly production process. The present study evaluated the efficacy of buffy brown pigment extracted from Hypoxylon fendleri for dyeing silk fabric following fungal identification using morphological features coupled with sequence analysis of the internal transcribed spacer region. The physiochemical parameters namely, pH, temperature, and incubation time along with glucose and peptone concentrations were optimized for in vitro pigment production using the desirability function. A pH of 7 at 28 °C temperature, 75 g/L glucose and 10 g/L peptone with an incubation time of 17 d was found to be optimum with a desirability value of 0.56. The chromatic properties of the dyed fabric were characterized on the basis of CIELAB coordinates. The fastness of color produced on silk fabric was assessed using standard tests for washing, perspiration, and rubbing fastness. Finally, the dye (pigmented liquid extract) obtained from H. fendleri showed good and uniform dyeing properties on silk fabric and could be an alternative natural source for dyeing silk fabric. Moreover, the use of natural dyes will aid in mitigating the hazardous environmental impacts of the synthetic dyeing industry.

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.

An Environmentally Sustainable Dyeing Approach for the Production of Ecofriendly Colored Wool Yarns via the Application of Millettia laurentii Natural Dye in Conjunction with Metal Salts and Biomordants

An Environmentally Sustainable Dyeing Approach for the Production of Ecofriendly Colored Wool Yarns via the Application of Millettia laurentii Natural Dye in Conjunction with Metal Salts and Biomordants

In situ encapsulation of anthocyanin within soybean protein isolate chains driven by pH for detecting the freshness of food

Intelligent indicator labels have been widely demonstrated as functional material to real-time monitor the freshness of food, whereas the migration problem of natural pH-sensitive dyes from the matrix into surface of packaging film restricted the practical application. Herein, a facile in situ encapsulation strategy was proposed to design and fabricate soybean protein isolate (SPI)/carboxymethyl cellulose sodium (CMC)/anthocyanin (Anth) (SCA) composite film as smart labels to monitor the freshness of protein-based foods. Inspired by the stimulation-response behaviors of Mimosa, Anth was in situ wrapped by the spatial structural mutation of SPI chains driven by different pH conditions, in which tannic acid (TA) served as pH modulator. Compared to CMC/Anth composite film free of pH modulation, the cumulative release of Anth from SCA-7.0 composite film was decreased from 90.97%, 82.45% and 70.52% to 64.14%, 53.88% and 39.45% in distilled water, 10% ethanol and 90% ethanol, respectively. Furthermore, the prepared SCA-7.0 composite film possessed reinforced UV-shielding, gas barrier and water resistance performances. When employed as intelligent label, this composite film can be an intelligent indicator label for real-time meat freshness monitoring. A facile strategy was carried out to in situ encapsulate the Anth within matrix, boosting the reliability and lifespan of intelligent packaging in practical application.

A Sustainable Technique to Enhance the Color Intensity of Natural Dyes on Cotton Fabric

Natural dyeing of cotton, as opposed to its synthetic counterpart, offers a multitude of benefits that extend far beyond aesthetics. While it imparts unique value to fabrics, its true significance lies in its contribution to environmental sustainability, human health, and cultural preservation. The bark of purple orchid (Bauhinia purpurea), harbors a natural pigment that contributes as a natural dye. Custard apple rind extracts, rich in tannins and other active compounds, have been documented to effectively mordant various fabrics, including cotton. This eco-friendly option offers a sustainable alternative to conventional, often metal-based mordants, potentially reducing environmental impact. Optimum results were achieved with the pre-treatment using casein (8%) and 0.5 part of K2CO3 to 1 part of casein. The pre-treated and pre-mordanted fabric was dyed at 80 °C at 12% concentration for 60 minutes. The colour of each dyed material was investigated in terms of the CIELAB (L*, a*, and b*) and K/S values.

Exploring the synergy of Zn3(OH)2V2O7 2H2O @Betalains as a promising photoluminescent nanocomposite for sustainable optical and electrochemical applications

For the first time, the new approach was utilized to synthesize a novel Zn3(OH)2V2O7 2H2O/Betalains (ZV/Bn) nanocomposite (NCs) through the mediation of natural dye betalains (Bn) extract and a hydrothermal method. With decreased crystallite size (38 nm) and a lower band gap, ZV/Bn NCs are showing a potential candidate with better performances in photoluminescence, nitrite sensing, and corrosion inhibition studies when compared to pure ZV nanoparticles. The optical band gap of ZV/Bn is 2.7 eV, and the Bn is effective in reducing the band gap of ZV by 0.3 eV. ZV/Bn has shown its intense fluorescence properties by emitting a vibrant green emission with a strong emission peak at 535 nm and a subtle peak at 489 nm. The exceptional ability of ZV/Bn fluorescent was significantly employed for the development of latent fingerprint detection, resulting in the high quality of fingerprint images. ZV/Bn-based sensors have proved to be successful due to their low cost, biocompatibility, and high sensitivity towards the detection of the most important bioanalyte, nitrite. The limit of detection (LOD) and the sensitivity of ZV/Bn-based sensor for the detection of nitrite are 17 μM and 7.8E−6 A/M, respectively. Additionally, it shows potential as a corrosion inhibitor. Hence, ZV/Bn NCs emerge as a versatile candidate for optical and electrochemical applications.

Per-acetic acid effect on separation of banana fiber and their dyeing with natural dyes

The fiber derived from the pseudo-stem of the banana plant is the subject of this investigation. It describes the processes involved in creating pseudo-stem fiber from bananas, such as fiber extraction, retting, and degumming. Banana fiber has been separated using per-acetic acid. To evaluate the efficacy of the process, the fiber's appearance and form have been altered. A homogeneous, spotless surface was observed under Scanning Electron Microscopy. Weight loss is the outcome of the treatment and absorbency increases. 3.66% of the weight loss is attributed to the per-acetic acid treatment. The fiber’s average diameter was reduced 81.9% compared to the raw fiber. Fourier transform infrared spectroscopy analysis was utilized to assess the chemical changes brought about by the treatment, which verified the presence of cellulose in the fiber. The separated fibers were colored using natural dyes, which were then assessed based on how well they characterized the color. The results demonstrated the use of natural colors derived from extracts of madder and myrobalan. The standard test indicates that ferrous sulfate (FeSO4) exhibits strong resistance to light, washing, and rubbing fastness, making it a viable mordant for achieving brown to black color.Graphical

Development of Antimicrobial and Insecticidal Silk Fabrics via Eco-printing with Natural Dyes from Agricultural Wastes

Development of Antimicrobial and Insecticidal Silk Fabrics via Eco-printing with Natural Dyes from Agricultural Wastes

Chemical structure modification of Brazilin-based natural dye with TiO2 nanostructure improves photovoltaic properties for maximum simulated PCE for DSSCs application

Brazilin has been explored as a photosensitizer in dye-sensitized solar cells (DSSCs) owing to its easy extraction, abundance, and environmental friendliness. However, its narrow solar spectrum absorption and weak interaction with the semiconductor hamper its wide application, highlighting the need for developing novel dyes for enhanced DSSC performance. This study reports eight designed dyes (Braz 01 ‒ Braz 02tb) obtained via introducing the π-bridges such as benzene, thiophene, and benzene-thiophene linked to thieno[3,2-b]thiophene, alongside a cyanoacrylic acceptor into the sites of two hydroxyl (OH) groups of brazilin dye. The density functional theory (DFT) and time-dependent density functional theory (TD- DFT) methods were employed to examine the free dyes' photoelectrical, optoelectronic and structural properties. The results show that the absorption spectra of the designed dyes redshifted by 183.22 nm 239.43 nm regarding the brazilin dye. The energy gap was reduced from 5.074 to 2.46 eV. The reorganization energy decreased from 0.951 eV to 0.528 eV, indicating that the designed dyes exhibited better intramolecular charge transfer (ICT). Notably, the electron affinity, electron accepting power, and maximum charge transfer increased from 1.021 3.472 eV, 1.024 8.387 eV and 1.447 4.780, respectively, signifying improved ICT. The exciton binding energy was lowered from 0.591 0.137 eV, implying that all designed dyes possess minimum charge recombination. The amount of charge transfer of the designed dyes (0.286219.051 au) was observed to be greater than brazilin, signifying enhanced ICT. Moreover, the theoretical DSSCs sensitized with designed dyes demonstrated higher PCE than brazilin dye. The greatest PCE of 13.1 % was attained by Braz 01tb dye. Generally, the improved optoelectronic and photovoltaic characteristics observed in all the designed dyes indicate that modifying the hydroxyl group on the brazilin's R1 or R2 location enhances its photoelectrical properties. Therefore, the designed dyes are regarded as superior candidates for utilization as photosensitizers in DSSCs.

Inai Cultural Dialectics: Indigenous Knowledge of Natural Dyes among the Iban Dayak as a Response to the Phenomenon of Fast Fashion

Inai Cultural Dialectics: Indigenous Knowledge of Natural Dyes among the Iban Dayak as a Response to the Phenomenon of Fast Fashion

Cleaner isolation and application of sustainable new novel source of natural dye from tallow laureal (Litsea glutinosa) for silk dyeing

AbstractThe utilization of waste plant residues in useful work particularly as the source of green dyes in textiles is now a days welcoming by global community. In this study, brown bollygum chips (Litsea glutinosa) called tallow laurel has been explored for silk dyeing using ecofriendly approaches. Extraction has been done in suitable medium and utilized onto fabric before and after microwave (MW) treatment up to 10 min. Response surface methodology was employed to observe the significant of selected dyeing parameters at which shade development with improved colorfastness was observed. It was found that 2 min radiation to both acidic extract of tallow laureal and silk fabric is the useful condition to get colorfast shade when employed before and after mordanting with iron salt and tannic acid solution as eco‐chemical agent, whereas with walnut bark and pine nut hulls extract as eco bio agents. The highest color strength value of 4.58 was observed using tannic acid as postchemical mordant for silk dyeing. The standard methods for fastness as per ISO to light, washing, and rubbing reveal that using selected shades made under ecofriendly cost time and energy effective conditions, stable colorfast hues were rated good with the value of 4/5. Therefore, it is recommended that MW treatment in addition with statistical approach i.e., central composite design used for exploring new dye yielding plant, then using eco‐mordanting technique will help in getting promising colorfast shades.

Digital-Based Sharia Marketing Strategy to Increase Sales at The Ciwaringin Natural Dye Writing Batik Center Cirebon

Digital-Based Sharia Marketing Strategy to Increase Sales at The Ciwaringin Natural Dye Writing Batik Center Cirebon

Natural dyes developed by microbial-nanosilver to produce antimicrobial and anticancer textiles

Developing special textiles (for patients in hospitals for example) properties, special antimicrobial and anticancer, was the main objective of the current work. The developed textiles were produced after dyeing by the novel formula of natural (non-environmental toxic) pigments (melanin amended by microbial-AgNPs). Streptomyces torulosus isolate OSh10 with accession number KX753680.1 was selected as a superior producer for brown natural pigment. By optimization processes, some different pigment colors were observed after growing the tested strain on the 3 media. Dextrose and malt extract enhanced the bacteria to produce a reddish-black color. However, glycerol as the main carbon source and NaNO3 and asparagine as a nitrogen source were noted as the best for the production of brown pigment. In another case, starch as a polysaccharide was the best carbon for the production of deep green pigment. Peptone and NaNO3 are the best nitrogen sources for the production of deep green pigment. Microbial-AgNPs were produced by Fusarium oxysporum with a size of 7–21 nm, and the shape was spherical. These nanoparticles were used to produce pigments-nanocomposite to improve their promising properties. The antimicrobial of nanoparticles and textiles dyeing by nanocomposites was recorded against multidrug-resistant pathogens. The new nanocomposite improved pigments' dyeing action and textile properties. The produced textiles had anticancer activity against skin cancer cells with non-cytotoxicity detectable action against normal skin cells. The obtained results indicate to application of these textiles in hospital patients’ clothes.

Exploration of Cajanus Cajan Husk for Natural Dye Extraction: Its Characterization and Application on Cotton Fabric

Exploration of Cajanus Cajan Husk for Natural Dye Extraction: Its Characterization and Application on Cotton Fabric