Extraction of natural color component from the bark of Belleric myrobalan (Terminalia bellerica): Kinetic and adsorption studies

Vinod, K. N.; Sudhakarb, Rajagopal

doi:10.5155/eurjchem.1.3.206-210.128

Cited by 4 publications

(5 citation statements)

References 19 publications

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“…The changes in colour depth vs light fastness grades in dyeings mordanted with aluminium (), tin (), iron (), chromium (), and copper () salts . Quadrants are indicated by Roman numerals in part (a) of the figure.…”

Section: Colour Depth Changes and Light Fastness Improvementsmentioning

confidence: 99%

“…The changes in colour (lightness, brightness, and hue) vs light fastness grades in dyeings mordanted with aluminium (), tin (), iron (), chromium (), and copper () salts …”

Section: Colour Changes and Light Fastness Improvementsmentioning

confidence: 99%

“…Mordants are agents applied onto substrates before, during, or after the coloration step (termed pre‐, meta‐, and post‐mordanting respectively). Plant polyphenols such as tannins and tannic acid function as mordants , but metal salts are by far most commonly used.…”

Section: Introductionmentioning

confidence: 99%

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Metal mordanting in dyeing with natural colourants

2016

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Metal mordanting, or the application of metal salts, is a common method of improving the light fastness in dyeing with natural colourants. This review presents the results from a survey of the literature on metal mordanting to assess what levels of correlation exist between mordant‐induced effects (changes in colour and colour depth) and the changes in light fastness, what is known about the mechanisms of mordant‐induced improvements of light fastness, and how the salt levels used in coloration processes compare with the limits on metal levels in wastewater and on the dyed substrates. No strong interrelationships are found between the mordant‐induced effects and light fastness improvements. Knowledge about mechanisms of mordant effect on light fastness appears, in large part, to be derived from empirical correlations. However, as light fastness is affected by a multitude of factors, the correlations do not always hold true. It is found that residual metal contents in spent dye/mordanting liquors are generally not reported. However, with rough calculations, it is estimated that, with even the lowest reported salt concentrations, the metal contents in spent liquors exceed environmental release limits. The metal contents on dyed substrates are also not generally reported, but similar estimations show that the contents of heavy metal on dyed substrates (when copper and chromium salts are used as mordants) also exceed limits. On the basis of these observations, the authors make suggestions for elements to be included in investigations on furthering the use of natural colourants in textile dyeing.

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Section: Colour Depth Changes and Light Fastness Improvementsmentioning

confidence: 99%

“…The changes in colour (lightness, brightness, and hue) vs light fastness grades in dyeings mordanted with aluminium (), tin (), iron (), chromium (), and copper () salts …”

Section: Colour Changes and Light Fastness Improvementsmentioning

confidence: 99%

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Metal mordanting in dyeing with natural colourants

2016

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“…Mongkholrattanasit et al [6] and Goodarzian & Ekrami [13] reported that dyes extracted from Eucalyptus leaves and Rubia Tictorium L. showed wash fatsness for change in colour and staining is 4/5. K. N. Vinod [7] stated that dyes from bark of Terminalia bellerica showed wash fastness to staining between 4 -5. Colour fastness values for staining of our study are comparable with data reported by these researchers.…”

Section: Colourfastness To Washingmentioning

confidence: 99%

“…using naturally occurring sources of dye) maintain that natural dyes have a far superior aesthetic quality, which is much more pleasing to the eye [4]. There are also some studies regarding producing natural dyes such as dyes extracted from red prickly pear [5], eucalyptus leaves [6], Terminalia bellerica (T. bellerica) [7] and many more.…”

Section: Introductionmentioning

confidence: 99%

Nano Natural Dyes from <i>Melastoma Malabathricum L.</i>

Ahmad

Nor

Saim

et al. 2012

AMR

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In this study, natural colours were produced from Melastoma Malabathricum L.’s (Senduduk) plant. The dyes were extracted from the petal part of the plant using solvent extraction method of acidified methanol and methanol. The natural colours were then converted into powder form of nano size scale using a ball mill grinder. Silk fabrics were used as the substrate and dyed using several natural and synthetic mordant. The use of different solvents for extraction and mordant for dyeing resulted in different colour shades on the silk fabrics. The color fastness to washing tests revealed colour fastness to washing ranging from 3 – 4/5 and the change in color ranging from 3/4 – 4/5. The findings will benefit and promote the dyeing and printing industry such as batik manufacturers and local fashion industry in using natural dyes. On the other hand, dyes from plants can also be used as an alternative to synthetic dyes for dyeing natural silk fibers.

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