Since some synthetic dyes are associated with environmental
pollution and are harmful to people's health, more attention is
being paid to environmental protection, sustainable development
and natural lifestyle. Interest in the potential use of natural dyes has
been growing, given they have high compatibility with the environment,
minimal toxicity and low allergic reaction, and they are
available in a range of natural shades as compared with synthetic
dyes. Natural dyes can be obtained from plants, animals and minerals
(Shahid et al., 2013).