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Posts Tagged ‘chemical’

Photo: Rory Murphy.
Chemical dyes are often toxic for the environment and bad for human health, and that is why the National Theatre in London is planning to use natural dyes from a rooftop garden in its costumes.

My friend Ann is deep into using natural dyes for her textile art, and she even grows the plants that are used for those dyes. It is not just that she is concerned about all the synthetics in our environment, she loves the colors that nature produces.

In London, the National Theatre is on the same track.

Helena Horton  writes at the Guardian, “Squint at the roof of the grey, brutalist National Theatre on London’s South Bank and you might be able to spy a riot of color spilling from the concrete. This is the theater’s new natural dye garden, from which flowers are being picked to create the colors for the costumes worn in the theater’s plays.

“Chemical dyes are often toxic for the environment and bad for human health, so the costume designers at the theater are experimenting with using flowers including indigo, dahlias, hollyhocks, camomile and wild fennel to create the vivid colors used in their productions.

“The textile artist, Liz Honeybone, is buzzing with excitement about the opportunities the new garden is bringing. … She has been very concerned about the health impacts of using harsh, synthetic chemical dyes, which require users to be swaddled in protective clothing. …

“ ‘There used to be a thing called dyer’s nose, which is basically when the aniline dyes came in,’ Honeybone said, ‘They used to destroy your nasal membrane.’ …

“The theater is planning to use natural dyes from the garden in every production at the South Bank going forward, starting with Playboy of the Western World, which is on this autumn and winter.

“Claire Wardroper, costume production supervisor at the theater, said it was ‘a beautiful early 19th century piece, with lots of nice woolly jumpers, because it’s set in rural Ireland, and we can certainly get some nice colors into them.’ …

“They are trying to bring a gentler, more environmentally friendly way of dyeing into the mainstream. ‘We are saying that if you want to use this horrible synthetic dye, you can do that, but you can achieve this beautiful look by using a natural dye, and we can do it a little bit slower and a bit more sort of organically,’ said Honeybone.

“Wardroper added: ‘It’s unfortunate to say, but the theatre and film and anything creative in one-shot opportunity entertainment has a history of being incredibly wasteful.’ …

“Honeybone said: ‘It’s been such a good harvest. My indigo is more than I can cope with. I’ve got three shows going on at the moment, so I’ve had to recruit people to help me.’

“People may imagine the colors extracted from flowers will be muted compared with synthetic dyes, but Honeybone said this could not be further from the truth and she has been able to create neon greens and yellows. ‘Our forefathers were drowning in color. They loved it, it wasn’t hard to get and all the tapestries that were up on the wall were a riot of color. What we’re seeing now is the sad, faded leftovers,’ she said.

“Honeybone says she has become ‘obsessed’ with natural dyeing. ‘My daughter gave me a bunch of flowers on Mother’s Day, and I noticed there was some golden rod in it, so whisked that out and dyed with it just to see what it yielded. And it was the most glorious, strong yellow.’

“The garden is not only used for dyes but also as a refuge from the hustle and bustle of the theatre. The pair said actors were frequently seen pacing among the flowers, or sitting down on benches to learn their lines.

“The space is also a haven for wildlife. The grey concrete of the South Bank does not have a huge amount to offer pollinators, and they have been swarming to the garden to sample the nectar from the varied dye plants.

“Wardroper said: ‘We’re seeing so much more wildlife, like hummingbird moths, and we’ve got bees on the National Theatre roof which produce honey for the National Theatre. And they’re loving the variety of plants that we’ve planted as well. These are a new stock of plants that they just haven’t had access to. So the bee person that comes in and caters to the bees is very happy.’

“The pair hope that most if not all of the costumes at the theatre can eventually be produced using natural methods. But for now, Honeybone is enjoying the opportunity to start using these dyes.

“She said: ‘This is such an all round sensory experience, totally engulfed in the smells and the feeling. … It is just wonderful.’ ”

More at the Guardian, here. (Gotta love that someone in this earthy-crunchy field has a name like Honeybone and that Wardroper oversees the wardrobe!)

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Today’s post features two articles on a worrisome environmental issue. In the Guardian, Oliver Milman reports that pollution from abandoned tires is killing off salmon in the Pacific Northwest and may be harming other wildlife as well. But at the Christian Science Monitor, writer Lindsey McGinnis suggests help is on the way.

Oliver Milman: “Pollution from car tires that washes into waterways is helping cause a mass die-off of salmon on the US west coast, researchers have found.

“In recent years, scientists have realized half or more of the coho salmon, also known as silver salmon, returning to streams in Washington state were dying before spawning. The salmon, which reach 2ft in length, are born in freshwater streams before making an epic journey out to sea where they live most of their adult lives. A small number then return to their original streams to lay eggs before dying.

“The cause of the die-off has remained a mystery but a new study, published in Science, has seemingly found a culprit. When it rains, stormwater carries fragments of old car tires into nearby creeks and streams. The tires contain certain chemicals that prevent them breaking down but also prove deadly to the coho salmon. …

“Said Jenifer McIntyre, an assistant professor of aquatic toxicology at Washington State University. ‘The more we look, the more we find it. In some years all of the fish we find dead did not spawn.’

“Samples taken from urban streams around Puget Sound, near Seattle, and subsequent laboratory work identified a substance called 6PPD, which is used as a preservative for car tires, as the toxic chemical responsible for killing the salmon.”

What can be done? Lindsey McGinnis talks to a group of inventive young people in England who may have an answer.

“Every time a car brakes, accelerates, or changes direction, the friction wears down the exterior of the tire, sending particles into the environment. Some remain suspended in the air, and others get swept into local waterways, where they can have devastating effects on plant and animal life. …

“A group of master’s students from Imperial College London and the Royal College of Art had an idea: what if the tires picked up after themselves?

“The Tyre Collective, a project by recent graduates Hugo Richardson, Siobhan Anderson, Deepak Mallya, and Hanson Cheng, seeks to capture this stealthy pollutant as it flies off the wheel. For the past year, they’ve been working on a device that can attach to the bottom of a car and use electrostatic charges, along with the airflow of the moving wheel, to collect particles for reuse.  

“The inspiration came from rubbing a balloon over a sweater and seeing the pieces ‘dancing around,’ says Mr. Richardson, chief technical officer of The Tyre Collective. ‘That led us to the assumption that the particles are charged due to the friction.’ ” 

The Tyre Collective won the 2020 James Dyson Award for the UK, which celebrates the next generation of design engineers. It was a runner-up for the international version of the award.

“Gavin Whitmore, manager of the Tire Industry Project, an initiative by the World Business Council for Sustainable Development geared toward better understanding the potential health and environmental impact of tires, says his organization is keeping an eye on their work … said, ‘We’re certainly interested to learn more, because it could be a very, very promising thing.’

“Tires are more complex than they look. The vulcanized rubber compound that makes up the outermost layer, the tread, often contains sulfur, zinc, carbon black, bisphenol A (BPA), and other chemicals. A lot of that gets swept off the roads by rain, along with motor oil, bits of pavement, and other litter.

“A three-year study by the San Francisco Estuary Institute (SFEI) found that stormwater carries roughly 7 trillion microplastic pieces into the bay annually – more than 300 times the discharge from the area’s wastewater treatment plant. Nearly half of those appear to be tire fragments.

” ‘Seeing all these black rubbery particles was a surprise,’ said Rebecca Sutton, a senior scientist at SFEI. … ‘No one had really looked at stormwater. It’s also probably just a tip of the iceberg, because most tire particles are actually smaller than our sieve size.’ …

“Tires are the second-largest source of primary microplastic pollution in the ocean, after synthetic textiles, according to the International Union for Conservation of Nature and Natural Resources. To reduce the amount of tire pollution, Dr. Sutton says governments could consider setting emission standards similar to those for engine exhaust.

“But it can be hard to figure out how much material tires are actually shedding, or should be shedding. Tire wear is heavily influenced by the roadway, the weight and type of vehicle, and the driver’s behavior. In London, The Tyre Collective says a busy bus route can generate a grapefruit-size pile of tire dust in a day. …

“Says Sarah Amick, vice president of environment, health, safety, and sustainability for the U.S. Tire Manufacturers Association, ‘Tires are one of the most regulated products for safety in the United States. [Ensuring] that we can continue to meet those safety requirements, plus adding more renewable and recyclable materials to our tires, it’s a challenge, but our members are working on that.’ …

“During lockdown, the [Tyre Collective] team has focused on turning their vision into a full-fledged startup. They say several manufacturers have expressed interest in their design, though no partnership has been formalized yet. When restrictions due to COVID-19 ease, they’re looking forward to returning to the lab and producing a set of first-generation prototypes to test with potential partners.” More

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Photo: Walter McBride/ Getty Images
Using drones to clean theaters could have long-lasting effects. Here’s Broadway’s Richard Rodgers Theatre with no people.

The other day, in my friend’s yard (six feet apart), we were discussing whether there were any positive things that would come out of the coronavirus — you know, like people washing their hands more and coughing into their elbows more and hence fewer colds. On this blog, we’ve seen lots of ideas from the arts community that could also continue in some form.  And what about more widespread appreciation of nature and healthy family relationships?

Changes in the way some companies do business may survive, too, but whether they will be positive remains to be seen. I’d be sorry to think the drone in today’s story would put anyone out of work. But as a curiosity, it’s something to talk about.

Marc Hershberg writes at Forbes, “As Broadway executives debate different strategies for reopening theaters following the COVID-19 pandemic, a Buffalo-based start-up company named EagleHawk has developed drones to spray disinfectants in Broadway theaters. …

“The disinfectant is stored on the ground, and pumped through a hose to the hovering drone, which then spreads it throughout the theater. Meanwhile, another drone drifts underneath it to make sure that the hose does not get tangled in any of the seats. …

“ ‘A Broadway theater could be disinfected by a drone in less than an hour, and without putting people on the front line,’ [Will Schulmeister, EagleHawk’s chief operating officer] said.

“While Broadway theater owners might be afraid of allowing the machines to flutter around their landmarked venues, the executives at EagleHawk insist that it is safe to operate inside. … The technology has been tested in several large venues, including KeyBank Center, the arena of the Buffalo Sabres professional hockey team. …

“While following the government guidelines for cleaning surfaces to get rid of pathogens like SARS-CoV-2, ‘we can control the liquid spray enough to not over-saturate the seats and still meet disinfection requirements,’ Schulmeister stated. …

“ ‘I could see the new drone technology being a good choice for arenas, stadiums, and large performing arts centers with thousands of seats,’ commented Susquehanna University theatre professor Erik Viker.

“While the leading Broadway theater owners declined to discuss their plans for cleaning seats after the pandemic, some facilities folks do not think that using the drones would fly.

“ ‘Actors are super hyper-sensitive to anything sprayed in the air,’ recognized a former theater executive. It is possible that the chemicals used to sanitize the seats might irritate some performers and affect their vocal abilities, much like dust and mildew. …

“Some smaller theaters have been experimenting with other possible alternatives, such as wands that emit ultraviolet light and machines that make antibacterial fogs. ‘We’re spending money on things to make the audience feel more comfortable,’ commented one small theater owner in Florida.” More at Forbes, here.

What coronovirus effects do you believe will last, if not cleaning by drone? More sense of community? More individualism and self-sufficiency? Sourcing food locally?

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Radio show Living on Earth did a segment in February on new technology to store and release solar heat. Here is host Steve Curwood on his outing to MIT to learn about the breakthrough.

“A team of researchers at MIT has come up with a chemical that would let windshield glass directly store solar energy and then release it on demand as heat to melt the ice. … The same chemical could be woven into clothing fibers to capture the sun’s energy and then give you some added warmth when you ask for it, even days later.

“I paid a visit to the lab where the MIT team has been working on this breakthrough and met up with researchers David Zhitomirsky and Eugene Cho, who work in the lab of professor Jeffrey Grossman.”

To Curwood’s question about the difference between the familiar electrical, battery-enabled solar technology and the MIT lab’s chemical version, Zhitomirsky replies,”We use these molecules that can absorb UV light and instead of generating charges, what they do is that they change shape, and by changing shape, they can store chemical energy …

“CURWOOD: OK, so sunlight hits this molecule, it changes shape and can storage its energy. And how do you get the energy out?

“ZHITOMIRSKY: So you can figure the material in several ways. One way is to add a small amount of heat, and the material will release more heat than you add in. The other methods are triggering it with light or you can apply an electrical field to the material. …

“The way we envision using it is to integrate into fibers that you then make clothing out of.” More here.

Release solar heat from my coat in a blizzard? Where do I sign up?

Photo: Helen Palmer
Living on Earth host Steve Curwood, right, in the MIT lab with Eugene Cho and David Zhitomirsky.

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