3. Result and discussion
3.1. Extraction of dye
The natural dyes were extracted from rhizomes of C. longa L.
(Zingiberaceae), seeds of T. foenum graecum (Fabaceae) and flowers ofN. oleander (Apocyanaceae) using aqueous, alkaline. alcoholic
and acidic extraction techniques. The color of the dye varied in
relation to the solvents used in the extraction and pH