Abstract
Natural dyes comprise of colorants that are obtained from animals or vegetable matters without any chemical processing. Natural dyes can substitute synthetic dye and promotes green technology initiatives in the field of textile dyeing. This study was carried out by extracting dyes from pineapple leaves (Ananas Comosus) using three stage mordanting methods using different mordants namely pre-mordanting, post-mordanting and simultaneous dyeing-mordanting. The mordants used were aluminium potassium sulphate, white vinegar and sodium chloride (NaCl). Wool fabrics were used for dyeing. The strength of colour and K/S values of the dyed fabrics were measured before and after washing. The colourfastness to washing, rubbing and light fastness of the fabrics were conducted to investigate the performance of the dye and mordants. The results indicate that the washing, rubbing and light fastness properties of dyed samples were between good to excellent grades.
Highlights
A dye can generally be described as a coloured substance that has an affinity to the substrate to which it is being applied [1]
This study used the leaves of Ananas Comosus to dye wool fabric and determine the best shades and mordanting method
Pre-mordanting: The fabric was treated with the mordant for 45 minutes at 60°C
Summary
A dye can generally be described as a coloured substance that has an affinity to the substrate to which it is being applied [1]. There are many categories of synthetic dyes depending on the type of chemical combination and their application on the material. Some examples are such as acid, basic, oxides, pre-metalized, direct, chrome, azoic, sulphur, disperse, reactive, and vat dye. Almost all the synthetic dyes can be modified to add beauty, in terms of brilliancy, to increase the strength of colours and fastness. The final colour strength and colour fastness properties are dependant on the dye itself but are determined by varying concentration, the types, and method of applying the mordants [19]. This study used the leaves of Ananas Comosus to dye wool fabric and determine the best shades and mordanting method
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