Rainbow of Natural Dyes on Textiles Using Plants Extracts: Sustainable and Eco-Friendly Processes

Abstract

Indians have been considered as forerunners in the art of natural dyeing. Although indigenous knowledge system has been practiced over the years in the past, the use of natural dyes has diminished over generations due to lack of documentation and precise knowledge of the extracting and dyeing techniques. As a result, natural dyes are not commercially successful. Presently, all environmentally unfriendly synthetic compounds are used for dyeing textile materials. They are non-biodegradable, carcinogenic and generate water pollution as well as waste disposal problems. Natural dyes provide a reasonable solution to these problems. Thus, it is imperative to develop technology for extraction of natural dyes and for their application on textile materials. In this study, attempt has been made to extract natural dyes from a variety of plants sources (such as rhizomes of turmeric, Curcuma longa; fruits of harda, Terminalia chebula; petals of safflower, Carthamus tinctorius; roots of barberry, Berberis lycium etc.) using specific techniques. These dyes were tested for their dyeing potential on different textile materials (cotton, silk and wool). Dyeing was done using three different dyeing techniques (pre-, simultaneous-and post-mordanting) wherein different mordants such as alum, copper sulphate and ferrous sulphate etc., were used to fix dye on to the textile material. A rainbow of natural dyes was obtained with varied shades of each colour. Shade cards were prepared for each dye and the colour obtained varied depending on the type of the mordant applied and the mordanting technique used.

Avaliação Da Qualidade De Um Afluente Utilizado Para Irrigação Na Região Semiárida De Pernambuco (Nordeste Do Brasil)

“…De acordo como INMET (2016), no período desse estudo, foram registrados 196,2mm de precipitação pluviométrica, aproximadamente 50% abaixo da média histórica local, possivelmente em virtude do prolongado período de seca, conhecido como estiagem, que acomete a região Nordeste do Brasil entre os anos de 2011 a 2015 (MARENGO et al, 2016;HERWEHE & SCOTT, 2017 Os metais são provenientes principalmente dos efluentes de tingimento que podem ser originados da molécula do corante como, por exemplo, o cobre nos corantes diretos, caracterizado como fixador (ARORA et al, 2017). Entre os principais metais ligados aos corantes são o cobre, cromo, colbato e níquel.…”

Preparation and Characterization on Natural Dyes Based on Neem, Henna and Turmeric for Dyeing onotton with Super Hydrophobic Coating

“…Around 30 million tonnes of dye was estimated for the global consumption for textiles and was expected to grow up to 3% per annum while 70,000 tonnes of dyes were released to the environment [2]. The population of people who will have allergic to the chemicals will grow up to 60 per cent by year 2020 which was stated in a business week [3,4]. In addition, approximately 280,000 tons of textile dyes are discharged annually worldwide and approximately 10,000 different dyes have been produced and an estimated 8x10 5 tons of synthetic dyes *Corresponding author: mnoraini@uthm.edu.my are used in the textile industry worldwide [4,5].…”

Cotton Fabrics Treatment With Gallnut Extract (Terminalia Chebula) For Improving Color Fastness Of Alizarin Dye

“…More chemical usage always leads to more pollution and toxicity, which may not be understood at that moment, but eventually, at later stage it will be understood the toxicity levels of that alternative routes are not eco friendly, that time we would have found a different solution. One of the best solutions for this is replacing chemical substances or synthetic substances with natural materials [1], [2].…”