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Dyeing and Colour Fastness Properties of Silk and Cotton Fabrics Dyed with Eucalyptus Bark Extract

TL;DR: In this paper, a dye extraction from the bark of eucalyptus and application for silk and cotton fabric dyeing was discussed. But this work was concerned with the extraction of dye from the leaves of the tree and not the leaves themselves.
Abstract: This research was concerned with dye extraction from the bark of eucalyptus and application for silk and cotton fabric dyeing.
Citations
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Journal ArticleDOI
TL;DR: In this paper, a natural dye extracted from eucalyptus leaves was applied to a silk fabric using two padding techniques, namely the padbatch and pad dry techniques, under different conditions.
Abstract: A natural dye extracted from eucalyptus leaves was applied to a silk fabric using two padding techniques, namely the pad‐batch and pad‐dry techniques, under different conditions. It was observed that with an increase in the dye concentration, the ultraviolet (UV) protection factor (UPF) values ranged between good and excellent for the silk fabric. In addition, a darker colour, such as that provided by a FeSO4 mordant, gave better protection because of higher UV absorption. A silk fabric dyed in a solution containing the eucalyptus leaf extract showed a shade of pale yellowish‐brown. The exception was when the fabric was dyed with the FeSO4 mordant, resulting in a shade of dark greyish‐brown. The colour fastness to washing and rubbing of the silk fabrics treated with the mordant after dyeing was investigated and the results showed good fastness, whereas colour fastness to light was at a fair level. The results confirmed that natural dyes from eucalyptus leaf extract with metal mordants have potential appli...

68 citations

Book ChapterDOI
14 Nov 2011
TL;DR: The use of non-toxic and ecofriendly natural dyes on textiles has become a matter of significant importance because of the increased environmental awareness in order to avoid some hazardous synthetic dyes as discussed by the authors.
Abstract: Natural dyes are known for their use in colouring of food substrate, leather, wood as well as natural fibers like wool, silk, cotton and flax as major areas of application since ancient times. Natural dyes have a wide range of shades that can be obtained from various parts of plants, including roots, bark, leaves, flowers and fruits (Allen, 1971). Since the advent of widely available and cheaper synthetic dyes in 1856 having moderate to excellent colour fastness properties, the use of natural dyes having poor to moderate wash and light fastness has declined to a great extent. However, recently there has been revival of the growing interest on the application of natural dyes on natural fibers due to worldwide environmental consciousness (Samanta & Agarwal, 2009). Although this ancient art of dyeing with natural dyeing with natural dyes withstood the ravages of time, a rapid decline in natural dyeing continued due to the wide available of synthetic dyes at an economical price. However, even after a century, the use of natural dyes never erodes completely and they are still being used. Thus, natural dyeing of different textiles and leathers has been continued mainly in the decentralized sector for specialty products along with the use of synthetic dyes in the large scale sector for general textiles owing to the specific advantages and limitations of both natural dyes and synthetic dyes. The use of non-toxic and ecofriendly natural dyes on textiles has become a matter of significant importance because of the increased environmental awareness in order to avoid some hazardous synthetic dyes. However, worldwide the use of natural dyes for the colouration of textiles has mainly been confined to craftsman, small scale dyers and printers as well as small scale exporters and producers dealing with high valued ecofriendly textile production and sales (Samanta & Agarwal, 2009; Bechtold & Mussak, 2009; Vankar, 2007). Recently, a number of commercial dyers and small textile export houses have started looking at the possibilities of using natural dyes for regular basis dyeing and printing of textiles to overcome environmental pollution caused by

28 citations

01 Jan 2012
TL;DR: This thesis compares organic and conventional agriculture in terms of its energy balance and reveals, that the sample organic farm needs less than one third of the energy consumed by the conventional farm.
Abstract: Bachelor ́s thesis compares organic and conventional agriculture in terms of its energy balance. First part covers the history of organic agriculture in the Czech Republic and informs about the law and rules which are the organic farmers obligated to follow. Chapter involves charts and maps demonstrating present state and spatial arrangement of organic farms in the Czech Republic. Second part of the thesis examines researches from aboard, which are focused on energy comparison of agriculture in different husbandry systems. Third part is a comparison of three apple orchards in the Czech Republic. The research reveals, that the sample organic farm needs less than one third of the energy consumed by the conventional farm. On the other hand, the amount of the fruit harvested is smaller. Energy efficiency is comparable for conventional farm and orchard in transition period and lower for sample organic farm.

20 citations

Journal ArticleDOI
02 May 2013
TL;DR: In this paper, natural dyes from Eucalyptus leaf extract, quercetin, rutin, and tannin were applied to silk fabric by pad-batch and pad-dry techniques under different conditions.
Abstract: Natural dyes from Eucalyptus leaf extract, quercetin, rutin, and tannin were applied to silk fabric by pad-batch and pad-dry techniques under different conditions. Ferrous sulfate was used as a mordant. The dyeing properties were evaluated by measuring K/S and CIELAB values. In addition, the different fastness properties were evaluated. The effect of dyes at different concentration levels with respect to their colour strength was also studied.

17 citations

01 Jan 2012
TL;DR: In this article, natural dyes from eucalyptus leaf extract, quercetin, rutin and tannin were applied to silk fabric by padding techniques, namely the pad-batch and pad-dry techniques under different condition.
Abstract: Natural dyes from eucalyptus leaf extract, quercetin, rutin and tannin were applied to silk fabric by the padding techniques, namely the pad-batch and pad-dry techniques under different condition. In this experiment, ferrous sulfate was used as a mordant. The dyeing properties were evaluated by measuring K/S values and CIELAB. The different fastness properties were evaluated. The effect of dyes at different concentration levels with respect to their colour strength was also studied.

7 citations