Extraction of Indigo dye from Couroupita guianensisand its application on cotton fabric

Geng

Int. Arch. Photogramm. Remote Sens. Spatial Inf. Sci.

2015

ABSTRACT:Tripitaka is the world's most comprehensive version of Buddhist sutra. There are limited numbers of Tripitaka currently preserved, most of them present various patterns of degradation. As little is known about the materials and crafts used in Tripitaka, it appeared necessary to identify them, and to further define adapted conservation treatment. In this work, a study concerning the paper source and dyestuff of the Tripitaka from approximate 16 th century was carried out using fiber analysis and thin-layer chromatography (TLC). The results proved that the papers were mainly made from hemp or bark of mulberry tree, and indigo was used for colorizing the paper. At the end, we provide with suggestions for protecting and restoring the ancient Tripitaka.

Section: Thin-layer Chromatography Analysis Of the Blue Dyementioning

confidence: 76%

Characterization of Ancient Tripitaka

Geng

Int. Arch. Photogramm. Remote Sens. Spatial Inf. Sci.

2015

“…Although the organic compounds of blue pigments were identified as indigo and indirubin, mainly derived from their precursor indoxyl‐3‐ O ‐β‐ d ‐glucoside (indican), the independent evolutionary process and molecular mechanisms behind indigo biosynthetic pathways in plants remain largely unclear. Previously, most studies on dye plants focused on resource utilization from ethnobotanical investigations (Cardon, 2007; Han and Quye, 2018; Andriamanantena et al ., 2019; Zhang et al ., 2019), colorant extraction and compound identification in phytochemistry (Chanayath et al ., 2002; Tayade and Adivarekar, 2014; Dutta et al ., 2017). Only limited genetic and genomic resources of indigo plants are available (Kang et al ., 2020), and the investigation of the molecular mechanism of indigo biosynthesis has been largely ignored.…”

Section: Introductionmentioning

confidence: 99%

Blue genome: chromosome‐scale genome reveals the evolutionary and molecular basis of indigo biosynthesis in Strobilanthes cusia

Zhang

Cunningham

et al. 2020

The Plant Journal

Natural plant dyes have been developed and used across many traditional societies worldwide. The blue pigment indigo has seen widespread usage across South America, Egypt, Europe, India and China for thousands of years, mainly extracted from indigo-rich plants. The utilization and genetic engineering of indigo in industries and ethnobotanical studies on the effects of cultural selection on plant domestication are limited due to lack of relevant genetic and genomic information of dye plants. Strobilanthes cusia (Acanthaceae) is a typical indigo-rich plant important to diverse ethnic cultures in many regions of Asia. Here we present a chromosome-scale genome for S. cusia with a genome size of approximately 865 Mb. About 79% of the sequences were identified as repetitive sequences and 32 148 protein-coding genes were annotated. Metabolic analysis showed that the main indigoid pigments (indican, indigo and indirubin) were mainly synthesized in the leaves and stems of S. cusia. Transcriptomic analysis revealed that the expression level of genes encoding metabolic enzymes such as monooxygenase, uridine diphosphate-glycosyltransferase and b-glucosidase were significantly changed in leaves and stems compared with root tissues, implying their participation in indigo biosynthesis. We found that several gene families involved in indigo biosynthesis had undergone an expansion in number, with functional differentiation likely facilitating indigo biosynthesis in S. cusia. This study provides insight into the physiological and molecular bases of indigo biosynthesis, as well as providing genomic data that provide the basis for further study of S. cusia cultivation by Asia's traditional textile producers.

“…Awareness regarding synthetic dyes in terms of their toxic and allergic nature have lead to forceful implementation of severe regulations in different countries to maintain social, environmental and economic significance of methodologies, as well as products used (Prabhu and Bhute, 2012; Purwar, 2016). Therefore, there is growing interest in use of natural dyes due to better bio-degradability and suitability with the environment (Chengaiah et al , 2010; Tayade and Adivarekar, 2014; Adeel et al , 2018).…”

Section: Introductionmentioning

confidence: 99%

Statistical modelling for optimisation of dyeing of silk with semisynthetic azo dye made by chemical modification of areca nut

Pawar

Biranje

Patankar

et al. 2020

RJTA

Purpose This paper aims to focus on the optimisation of dyeing recipe for dyeing of silk fabric with semisynthetic azo dyes synthesised by chemical modification of areca nut extract. Design/methodology/approach The response surface model (Box–Behnken design) was used to establish the relation between the parameters of dyeing such as time, temperature and material to liquor ratio. Their output responses in terms of colour strength (K/S values) are reported. Their relationship was tested for predictability and the experimental values and found to match closely, which confirms the model suitability. Findings Dyed fabrics were tested for their fastness properties such as wash, rub and lightfastness. The results of the fastness tests indicate that modified dyes have good dyeability towards silk fabric. The dyed fabrics were also tested for ultraviolet protection factor and antimicrobial activity, which showed very promising results. Originality/value Banned amine testing was done, which confirms the absence of banned amine in synthesised dyes, which indicates the potential of its sustainability. Also, such an approach of modification of natural dyes as semi-synthetic dyes can be surely considered to be a step towards its widespread acceptability and further commercialisation.