The Problem
Indigo is the most significant chemical dye in the
world, with an annual production of 20,000 tonnes. (Balfour-Paul, 1998 p.231) The
method of manufacturing synthetic indigo is wrought with toxicity, and
sustainability issues. (Cardon, 2006) Synthetic indigo is made from aniline,
formaldehyde, and hydrogen cyanide. Its use in the manufacturing process of
blue jeans causes pollution and water quality problems in the developing world.
“The results can be seen, for example, where the
Natural dyes are environmentally friendly, sustainable, and renewable. Natural dyes are renewable resources that are kinder to the environment in their use, than chemically synthesized dyes. Natural indigo bearing plants can be grown in temperate climates and may be used to replace a portion of the market for chemical dyes in textile manufacturing, especially where organic, and sustainable principles of production are important. Further, natural dyes support local economies and are valuable to small scale growers, artisan dyers and local textile production.
Woad natural dye is especially valuable. It can be grown in marginal conditions and will produce indigo. It can be extracted on a commercial scale or an artisanal scale.
It will also give every colour of the spectrum -- red, orange, yellow, green and purple -- as well as blue and indigo
From different parts of the plant using different extraction and natural dye methods.
