Dyeing of Textile Using Different Mordants, Mordanting Techniques and Their Effects On Fastness Properties

Abstract

The uses of synthetic dyes in textile industries give a negative impact to the environment and causing many pollutions, hence to avoid it, natural dyes are used instead. Many researches study on natural dyes as substitute to synthetic dyes in textile the industry. Natural dyes usually connect with mordant as it helps in dye take-up and increases in colour fastness. Most commonly used metal mordant in natural dye are aluminium potassium sulphate (KAI(SO₄)₂.12H₂O₂), ferrous sulphate (FeSO₄.7H₂O), and copper sulphate (CuSO₄.5H₂O). The uses of different types of mordant on natural dyes give a variety of shades, colour and also increase the fastness properties in fabric dyeing. The process can be done in three techniques of mordanting, which are pre-mordanting, post-mordanting and meta-mordanting or known as (simultaneously mordanting). There are several studies that show an improvement on the scoring of fastness properties from moderate to excellent ranging (3 - 5) by using mordant compared to the result of un-mordanted fabric. It can be concluded, that the best mordanting techniques being employed in most studies are pre-mordanting technique and ferrous sulphate is shown to have the best impact on most of the fastness properties.