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Author(s): A. Gomez | V. Soto | P. Monllor | M. Bonet

Journal: Annals of the University of Oradea. Fascicle of Textiles, Leatherwork
ISSN 1843-813X

Volume: XIV;
Issue: 2;
Start page: 133;
Date: 2013;
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Keywords: Natural dye | cotton | onion | red onion | dye | fastness.

Nowadays developed countries are concerned about environmental issues and some laws are focused on preserving it. This means that some industrial procedures must be redesigned and the ancestral ones can be reconsidered as a valuable alternative to the nowadays process. The textile sector is one of those which has pollutant processes and one of the most related is the wet process, mainly dyeing and printing. Different dyes are considered in order to replace the ones used recently as their chemist implies they are pollutants. Natural resources are seriously considered as the alternative for a friendly environmentally dyes process. The aim of this paper is to evaluate the dyeability of some onion spicies (Allium Cepa). The conducted experiment was based on the onion extraction and lately dyeing procedure. Different concentrations were used for the extraction. An exhaustive analysis was performed on the dyed samples. Cotton fabrics were visually analysed but obiosuly results are showed based on colorimetric measurements. Lately, they were washed as ISO standard states in order to evaluate the dyed samples colour fastness. Results show onion is a chance for dyeing and that different colours can be obtained depending on the onion spicie despite lightness differences are not significant.
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