Development of dye powder preparation from natural dyes

Abstract

The objective of this research is to preparation of dye powder from natural dyes. The conditions of preparation of dye powder and properties of natural dye powder were studied. The natural dyes were used in this research containing of Lac, Ebony heart wood, Sappan heart wood, Turmeric and dried Butterfly pea. The natural dyes powder were prepared by three methods; oven drying, salt adsorption and salting out. The natural dyes powder were dyed on silk fabric and then characterized by colour strength (K/S), washing fastness and light fastness. The results showed that the dye powder from dried Butterfly pea could not be prepared by dye powder preparation used in this research because of the dye power was not stable. The dyes powder from Lac, Ebony heart wood, Sappan heart wood and Turmeric were prepared by all three methods. The oven drying and salting out methods showed higher K/S than salt adsorption method. And the K/S of dyes powder from oven drying and salting out methods were not significant. In the oven drying method showed good K/S on silk fabric dyed from the turmeric dye powder. And salting out method showed good K/S on silk fabrics dyed from Lac, Ebony heart wood and Sappan heart wood dyes powder. The different dye powder preparation methods did not effect on the colour appearance. The washing fastness of dyed silk fabric from different preparation methods were not significant. The dye powder of Lac, Ebony heart wood, Sappan heart wood showed good light fastness and the Turmeric dye powder showed poor light fastness on silk fabric.