Dyes extracted from natural sources and some of their applications

Abstract

In this study, a group of natural dyes were extracted from plants (Such as turmeric, hibiscus, red cabbage, onion peel, pomegranate, And beets). The extracted anthocyanin dye has been used to dye cotton fabrics effectively using Vinegar and salt as a stabilizer. It has been also used as acid–base indicators which were compared with common indicators such as methyl orange and phenolphthalein. The results showed agreement in the extent of colour change. These extracts have also been used to prepare chromatography papers that resemble litmus papers.