Importance of natural dye over synthetic dye: a critical review (original) (raw)
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SOURCES OF NATURAL DYE -A CRITICAL REVIEW
Most of the synthetic dyes are noticeably found harmful and toxic. When used on textiles they can cause allergy, skin disease, cancer etc. So, there is need to produce natural dyes. Demand for natural dyes has been growing rapidly due to increased awareness on hazardous, toxic and allergic reactions associated with synthetic dyes. Natural dyes are obtained from natural sources such as plants, insects and minerals. Among all the plant based dye sources i.e. bark, leaves, flowers, seeds etc., these dye sources are more important for textile dyeing as all the sources provide dye from the source which is found in abundance but still not fully utilized. This paper reviews the available different dye sources, extraction of coloring components and colors obtained on textile material after dyeing process.
Dyeing of textiles with eco-friendly natural dyes: A review
The use of natural dyes for textile dyeing purpose decreased to a large extent after the discovery of synthetic dyes in 1856. As a result with a distinct lowering in synthetic dyestuff costs, the natural dyes were virtually neglected at the beginning of twentieth century presently there is an excessive use of synthetic dyes estimated at around 10,000,000.00 tons per annum, the production and application of which releases large amount of wastes and unfixed colorants to the environment thereby causing serious health hazards and disturbing the eco-balance of nature. Due to the current economic and environmental consciousness, research in this front should be titled towards the use of natural dyes for dyeing textile materials. This article gives an in depth review and analysis on the categories of textile materials suitable for dyeing with natural dyes, equipments for home and small scale commercial natural dyeing of textile, extraction and mordents used in dyeing textile with natural dyes, conventional and non-conventional method of natural dyeing of textile as well as colour fastness properties of natural dyes. This could help in explaining the merits associated with the use of natural dyes other than synthetic dyes in textile dyeing to overcome the challenges of using synthetic dyes in textile dyeing and as well portray the benefits of using natural dyes.
Natural Dyes Used in Textiles: A Review
International Symposium "Technical Textiles - Present and Future", 2022
For thousands of years, man has been trying to copy the colors from nature and to transpose them on different supports. Although the use of natural dyes has several limitations (the difficulty of controlling the dyeing process, the low reproducibility of the dyes) they are still used due to their eco-friendly and biodegradable properties. On the other hand, in the last years, there has been a tendency for consumers to be unique or different from others, and from this point of view, dyeing with natural dyes can be seen as an opportunity. Dyeing with natural dyes is not completely free from environmental harm due to mordants used in the dyeing process, that are not environmentally friendly chemicals. For this reason, replacing classic mordants with alternative natural mordants (biomordants) present an ecological approach. Natural dyes obtained from plant parts (flowers, leaves, roots, stem, fruit, and bark) and waste material (distillation residues resulting from the production of strong beverages, peels from vegetable processing, etc.) contain a variety of compounds with functional properties such as antimicrobial, UV protection, deodorizing, anti-moth, and mosquito repellent. This review describes the results of the research on the evolution of natural dyes, the types of natural dyes and their functional properties, and the mordants used in textile dyeing with natural dyes.
Textile dyeing by dyestuffs of natural origin
Hemijska industrija, 2006
The textile industry is one of the biggest industrial consumers of water especially dye houses which utilize synthetic dyes and other chemicals. Natural dyes are generally environmental friendly and have many advantages over synthetic dyes with respect to production and application. In recent years, there has been an interest in the application of these dyes due to their bio-degradability and higher compatibility with the environment. A review of previous work in the field of applying dyestuffs of natural source as possible textile dyes is given. From an ecological viewpoint, the substitution of chemical dyes by 'natural products' in textile dyeing may be feasible and may represent not only a strategy to reduce risks and pollutants, but also an opportunity for new markets and new businesses which can develop from the inclusion of ecology in trade policy.
Natural dyes with future aspects in dyeing of Textiles: A research article
Dyeing is a complex, specialized science. Nearly all dye stuffs are now producing from synthetic compounds. This means that costs have been greatly reduced and certain application and wear characteristics have been greatly enhanced. But many practitioners of the craft of natural dyeing (i.e. using naturally occurring sources of dye) maintain that natural dyes have a far superior aesthetic quality which is much more pleasing to the eye. On the other hand, many commercial practitioners feel the natural dyes are non-viable on grounds of both quality and economics. In the west, natural dyeing is now practiced only as a handcraft, synthetic dye being used in all commercial applications. Some craft, weavers and knitters use natural dye as a particular feature of their work.
Elsevier eBooks, 2017
Textile industries are very useful for human being but these are destroying eco system because of generation of huge wastewater containing toxic substances. Prime reason of toxicity is use of synthetic dyes. To save our environment there is no alternative of natural dye. There are many sources of natural dyes in the Universe. In this article possible sources of natural dyes are discussed (2008-2018). Prominent sources of natural dyes are onion, carrot, marigold, orange peel, rose etc. have been discussed gradually. Isolation techniques, dyeing methods and fastness properties have been discussed in this article.
dyeing textiles with an Eco-friendly natural dyes
The use of natural dyes for textile dyeing purpose decreased to a large extent after the discovery of synthetic dyes in 1856. As a result with a distinct lowering in synthetic dyestuff costs, the natural dyes were virtually neglected at the beginning of twentieth century presently there is an excessive use of synthetic dyes estimated at around 10,000,000.00 tons per annum, the production and application of which releases large amount of wastes and unfixed colorants to the environment thereby causing serious health hazards and disturbing the eco-balance of nature. Due to the current economic and environmental consciousness, research in this front should be titled towards the use of natural dyes for dyeing textile materials. This article gives an in depth review and analysis on the categories of textile materials suitable for dyeing with natural dyes, equipments for home and small scale commercial natural dyeing of textile, extraction and mordents used in dyeing textile with natural dyes, conventional and non-conventional method of natural dyeing of textile as well as colour fastness properties of natural dyes. This could help in explaining the merits associated with the use of natural dyes other than synthetic dyes in textile dyeing to overcome the challenges of using synthetic dyes in textile dyeing and as well portray the benefits of using natural dyes
Natural Dyes: Sources, Chemistry, Application and Sustainability Issues
Dyes derived from natural materials such as plant leaves, roots, bark, insect secretions, and minerals were the only dyes available to mankind for the coloring of textiles until the discovery of the first synthetic dye in 1856. Rapid research strides in synthetic chemistry supported by the industrialization of textile production not only led to the development of synthetic alternatives to popular natural dyes but also to a number of synthetic dyes in various hues and colors that gradually pushed the natural dyes into oblivion However, environmental issues in the production and application of synthetic dyes once again revived consumer interest in natural dyes during the last decades of the twentieth century. Textiles colored with natural dyes are preferred by environmentally conscious consumers and today there is a niche market for such textiles. But the total share of natural dyes in the textile sector is approximately only 1 % due to certain technical and sustainability issues involved in the production and application of these dyes such as nonavailability in ready-to-use standard form, unsuitability for machine use, and limited and nonreproducible shades. Natural dyes per se are sustainable as they are renewable and biodegradable but they cannot fulfill the huge demand from the textile sector in view of the preferential use of land for food and feed purposes. Also, overexploitation of natural resources to obtain dyes may result in deforestation and threaten endangered species. For these reasons, the Global Organic Textiles Standard (GOTS) permits the use of safe synthetic dyes and prohibits the use of natural dyes from endangered species. Various research efforts have been undertaken all over the world to address the shortcomings of natural dyes in view of the tremendous environmental advantage they offer. This book attempts to review the current status of natural dyes and various sustainability issues involved in their production and application and examines their future prospects.