Study on the color levelness of silk fabric dyed with vegetable dyes

Mohammad Gias Uddin

doi:10.1186/s40508-015-0038-1

Abstract

At present, customers are more conscious about the quality of clothing items. As a result, it becomes more challenging for the manufacturers to maintain the consistent dyeing quality. Unlevelness is generally unaccepted in commercial dyeing, except some cases such as stone-washed, acid-washed or pigment-dyed textiles. The aim of the study was to evaluate the color levelness quality of fabric dyed with vegetable dyes. For this purpose, dyeing was carried out on silk fabric with the aqueous extracts of mango, guava and henna leaves. Then the levelness of colored fabric was evaluated by spectrophotometric measurements in terms of color difference, ∆E value. It was concluded that unmordanted dyed samples have better color levelness quality than the mordanted ones. The unmordanted samples dyed with mango and guava leaves extracts showed excellent levelness quality while the unmordanted ones dyed with henna leaves extracts showed good levelness quality. On the other hand, the mordanted dyed samples showed good leveling quality for the three vegetable dyes except ferrous sulphate mordanted sample dyed with henna leaves extract. Again, among the mardanted samples the levelness quality was comparatively better in case of alum mordanted dyed samples and the average ΔE value was increased gradually when moved from alum to tin and finally to ferrous sulphate.

Highlights

The vegetable dyes are generally used for the coloration of the products in textile and fashion industries (For yarns, fabrics and garments), food industry (For sweets, confectionery and bakery products), and cosmetics industry (For soap, cream, powder, lipstick etc.)
This study was carried out to evaluate the color levelness of silk fabric dyed with mango, guava and henna leaves extracts and the differences among ΔE values obtained from different areas of fabric were used for such evaluation
The unmordanted samples dyed with mango and guava leaves extracts showed excellent levelness quality while the unmordanted ones dyed with henna leaves extracts showed good levelness quality

Summary

Introduction

The vegetable dyes are generally used for the coloration of the products in textile and fashion industries (For yarns, fabrics and garments), food industry (For sweets, confectionery and bakery products), and cosmetics industry (For soap, cream, powder, lipstick etc.). The use of vegetable materials in textile coloration is a well-known way of utilizing renewable raw materials according to the technical and with the increased interest in vegetable dyes a greater importance was given on using mordant. Metal ions of mordants which are widely used act as electron acceptors for electron donors to form coordination bonds with the dye molecules, making them insoluble in water [9, 10].

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Conclusion