The dyes being natural are earth friendly and help maintain
and ecological balance (Mahatma and Tamari, 2005). They
are non-allergic, non-toxic to human body and perpetuate an
ancient tradition. In 1905 Adolf von Baeyer (the scientist
who also formulated aspirin) was awarded the nobel prize
for discovering the molecular structure of indigo, and developing
a process to produce it synthetically (Ishii et al., 1995; Deo
and Desai, 1999).