รายงานวิจัย -- มหาวิทยาลัยเทคโนโลยีราชมงคลพระนคร, 2557The 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.Rajamangala University of Technology Phra Nakho
