Tuesday, July 14, 2015

NATURAL DYES vs. SYNTHETIC: Which is more Sustainable?

Dyes


Colours derived from plants may appear more planet-friendly than man-made dyes, but the case isn’t clear-cut.


Discovered in the mid-19th century by English chemist William Henry Perkin, mauveine, the first man-made colour, transformed textile manufacturing. These synthetic colours allowed manufacturers and dye houses to operate in large quantities, and offer vivid, rich colours. They became the go-to option; they stick to fabrics easily, don’t lose pigmentation, and offer a limitless palette of colour options.
Natural dyes have an older, more romantic heritage. Indigo, the most commonly known natural dye, is traced back to the days of the ancient India’s Indus river valley civilisation.
“The use of natural dyes on cotton was India’s unique gift to the world,” says Simran Lal, CEO of GoodEarth, a luxury home and clothing brand in Delhi.
But natural dyes lack the vibrancy of synthetic dyes and rely on arable land to produce the base material, such as cotton, the easiest fabric for natural dyes to adhere to. Conventional cotton, though, requires farms to spend heavily on water.
“I have workers in my factory who spend two to four hours everyday going to collect water, with no guarantees they’ll even find it,” says Sonal Baid, founder ofAura Herbal Wear, who blames synthetic dye factories for polluting local water sources.
Baid and her husband, Arun, have figured out how to use natural dyes at scale at their factory in Ahmedabad, India. Now, they want to convert India’s textile manufacturers, taking them back to natural dyes on natural fabrics, a tradition that Baid said was commonplace in the country until 40 years ago, when synthetic dyes took off.
That’s why the Baids turned to organic cotton, which uses less water, pesticides, and is easier on the soil. The Baids live in Ahmedabad in Gujarat, which is known as the ‘Manchester of the east’, a massive textile hub that’s seen its freshwater sources polluted by the runoff of synthetic dyes, and wanted to find a natural solution for the dyes and fabrics used in India’s textile centres.
While the country’s mills have made progress andwork is under way to reduce their chemical footprint, rinse water from the dying process is still blamed for contaminating many of India’s rivers.
Last year, the Delhi-based advocacy group, The Centre for Science and Environment did a study(pdf) in Tirupur, another textile city in south India. The results indicated that the river Noyyal, which runs near the dye houses and manufacturing plants in Tirupur, had significantly more chemicals than other rivers in the area.
Before starting Aura Herbal Wear in 2000, Arun worked for an industrial waste recycling firm, where he saw that water discharged by textile mills contained chemicals including formaldehyde, chlorine, lead, and mercury. 
According to Sonal, the rinse water at Aura’s facility is almost drinkable. “The water that comes out of our process is purer than the underground water we start our production with. That’s our trophy.”
Sonal discovered natural dyes in a painting class. “I didn’t know you could paint with natural colors.” She went home and started experimenting on small swatches of fabric with kitchen staples such as turmeric, coffee and tea. 
The challenge, she says, was scaling that process to long yards of fabric. After 14 years, the duo have mastered the art of natural dyes and are now selling not only ready-to-wear garments but the dyes themselves to other dye houses.
What started in the kitchen has grown exponentially. Their facility can produce more than 10,000 pieces a day and Aura now has a staff of 80 people, supplying 500 clients worldwide, including India’s luxury Taj Hotel spas.


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