Are Canvases Recyclable? Polyester, Cotton and the Honest Answer

In the world of art supplies, sustainability sparks heated debates. Critics quick to label polyester as "plastic pollution" overlook a more interesting reality: almost every environmental comparison you can find between polyester and cotton was written about clothing.

Clothing and canvas are not the same problem. A shirt is washed fifty times and thrown away. A painting support is made once and expected to outlive the person who painted on it.

Change the object and some of the answers invert. That is worth setting out properly, including the parts where polyester loses.

---

What cotton actually costs, according to someone independent

You will see a figure repeated everywhere claiming it takes 20,000 litres of water to produce one kilogram of cotton. We used to quote it on this page. We have taken it out.

Researchers investigating cotton claims traced that number to a WWF report from 1999 and could not find it in the report. A WWF infographic carried it from 2013 until late 2020, when the link was removed. The most recent International Cotton Advisory Committee data puts cotton at roughly 1,900 litres of irrigation water and 6,000 litres of rainwater per kilogram of lint. Real numbers, and a lot lower than the one in circulation.

We are not going to argue against cotton using a statistic that does not stand up. There are better ones.

The World Resources Institute, in its analysis of the apparel industry's environmental impact, states it plainly:

"Cotton farming is also responsible for 24 percent of insecticides and 11 percent of pesticides despite using about 3 percent of the world's arable land."

Drew, D. and Yehounme, G., "The Apparel Industry's Environmental Impact in 6 Graphics", World Resources Institute, 2017.

Twenty-four per cent of the world's insecticides, on three per cent of its farmland. That is a comparison that does not need inflating.

WRI also confirms the broader point: synthetic fibres have less impact on water and land than grown materials. Polyester needs no arable land, no irrigation, no fertiliser and no pesticide.

---

Where polyester loses, and why it matters less here

The same WRI analysis is blunt about the other side. Polyester emits more greenhouse gas per kilogram than cotton. A polyester shirt carries a bigger carbon footprint than a cotton one, 5.5kg against 4.3kg.

We are not going to hide that. But look at the unit.

That is a shirt. A garment that gets worn, washed, tumble dried, worn out and replaced. In apparel, roughly 85 per cent of textiles end up in landfill or incineration, and the average garment is now kept half as long as it was in 2000.

A canvas is not a shirt. It is made once, never laundered, and if it does its job it is still holding a painting in a hundred years. The carbon that went into making it is spread across a working life that a garment never gets close to.

The right question for a painting support is not emissions per kilogram of fabric. It is how many supports a painting needs over its life. One is the best possible answer.

And on microfibres

Roughly 500,000 tonnes of synthetic microfibres reach the ocean each year. It is a real problem and it deserves to be taken seriously.

It comes from laundering garments. Nobody washes a stretched canvas. A painting support is not a source of microfibre release, because the mechanism that causes it never happens to it.

---

The one that gets counted backwards

Every apparel comparison marks polyester down for not biodegrading. Cotton breaks down in months. Polyester does not.

For a shirt, that is a fair criticism.

For the thing holding up a painting, biodegrading is the failure mode. It is the entire problem we exist to solve.

You do not want your support breaking down. Conservation literature spends chapters on cotton and linen doing exactly that: taking up moisture and losing tension, going brittle with age, growing mould at prolonged high humidity, and degrading through acid hydrolysis of the cellulose.

A canvas that will politely compost itself is not a feature. It is a countdown.

So when a chart tells you cotton wins on biodegradability, read the column heading. In clothing, that is a win. In art, it is a description of how your painting's foundation eventually fails.

---

Green manufacturing in the plant where our canvas is made

Green manufacturing means continuous improvement of production processes to reduce environmental impact: less resource use, less waste, lower emissions, better efficiency across the operation. Here is what that looks like in practice at the plant where our canvas is manufactured.

Water management

Textile manufacturing is traditionally water intensive, and with Sub-Saharan Africa becoming increasingly water constrained, responsible water use is essential.

A water reticulation system reuses approximately 30 to 40 per cent of process water, reducing both overall consumption and the volume of effluent produced.

Energy efficiency

Manufacturing generates significant heat. Instead of releasing that energy into the atmosphere, a heat exchange system recovers and reuses it, transferring heat from hot air into water used in production and heating water up to 60°C. That reduces energy consumption and improves efficiency.

Waste reduction and repurposing

Textile waste is actively reduced by partnering with organisations that recycle and repurpose production offcuts.

Polyester waste is recycled back into fibre and used in non-woven applications. Other materials are transformed into practical products such as school bags, woven rugs and bedding for community use. Local vendors also repurpose offcuts into handmade products, which reduces landfill waste while supporting local enterprise.

Responsible raw materials

Every raw material used in production is evaluated to make sure it is safer for people and for the environment. The ongoing improvements include:

• Removal of chlorinated raw materials from coatings
• Environmentally safer surfactants through the elimination of APEOs
• Transition from older fluorocarbon technologies to safer alternatives
• Introduction of fluoro-free solutions where possible

These changes reduce environmental impact without compromising product performance.

Recycled material

Selected ranges use recycled polyester derived from post-consumer plastics such as bottles. Those are processed into fibre, spun into yarn, and woven into durable textiles that meet the same performance standards as virgin material.

Our Eco Canvas (Only available in South Africa) is made from 100% post-consumer recycled polyester, which removes the virgin fossil feedstock from the equation entirely.

Our Deep Edge and Thin Edge ranges are made this way.

Sustainability is an ongoing job rather than a finished one. Processes get refined, materials get re-evaluated, and better solutions get adopted as they become available.

---

Being precise about recyclable

Our canvas is made from 100% recyclable PET. That is a statement about the fabric, and it is accurate.

We are not going to tell you a finished canvas goes in your kerbside bin. It is a coated fabric stapled to a frame, and separating those is not something a household recycling stream is set up to do. Anyone claiming otherwise about a stretched canvas is stretching the truth with it.

What we can say is that the material itself is a recyclable polymer rather than a blend, and that production offcuts are recycled rather than landfilled.

---

A word to the artist auditing only the canvas

If you champion natural fibres, it is worth looking at the rest of the bench.

Synthetic paintbrushes are usually nylon or polyester, made from fossil feedstock, and are rarely recyclable. Natural-hair brushes raise animal welfare questions instead. Acrylic paints are water-based and low-VOC, but the binder is a petrochemical polymer, and certain traditional pigments carry heavy metals such as cadmium, cobalt and chromium.

None of that makes anyone a hypocrite. The point is that sustainability in a studio is a whole-process question, and the canvas is the part that gets singled out because it is the biggest and most visible object in the room.

---

The honest summary

Measure	Which does better	Does it matter for a canvas?
Water use	Polyester	Yes
Land and pesticides	Polyester	Yes
Carbon per kilogram of fabric	Cotton	Less than you would think, because a canvas is made once and never replaced
Microfibre shedding	Cotton	No. Caused by laundering, which never happens to a canvas
Biodegradability	Cotton	Yes, and it counts against cotton. A support that breaks down is a support that fails

Neither material is universally sustainable, and we are not claiming polyester is greener than everything. What we are claiming is narrower and, we think, harder to argue with.

The most sustainable canvas is the one that never needs replacing.

Longevity is the sustainability story for a painting support. A surface that holds tension for decades, does not rot, does not go brittle, and does not need restretching or relining is a surface that does not get remade, reshipped or thrown away. That is where the real saving is, and it happens to be the same thing that makes it good to paint on.

More detail on our sustainability page. We are not perfect, but we would rather show our working than round the numbers in our favour.

---

The canvas that does not need replacing

Both are 100% Polyester PET in warp and weft, pre-coated with our own gesso, on a strainer that holds its shape.

---

Sources

• Drew, D. & Yehounme, G. (2017) "The Apparel Industry's Environmental Impact in 6 Graphics", World Resources Institute. Link
• International Cotton Advisory Committee, water use per kilogram of cotton lint, 2020 data.
• Young, C., "History of Fabric Supports", chapter 5, in Stoner, J.H. & Rushfield, R. (eds.), The Conservation of Easel Paintings, Routledge / Taylor & Francis, 2012. On moisture response, embrittlement and degradation of cellulose supports.

Read next

• Why Polyester PET is the best artist canvas material. What the conservation literature says.
• Does a canvas need a backing board? What the V&A found when it surveyed 1,600 paintings.