Last updated: August 2026 · 6 minute read
Somewhere between the video telling you laundry pods are poisoning the ocean and the brand promising its sheets are "100% plastic-free," a reasonable person gives up and buys whatever's on offer in Tesco.
We understand the instinct. The information is a mess, and almost all of it is being written by someone with something to sell.
So here's ours, up front: we sell laundry sheets, and our sheets contain a synthetic polymer. We're going to spend the next few minutes explaining exactly what that means, where the science is genuinely unsettled, and — at the end — which question about our own product we can't yet answer.
If you're weighing up whether to switch, this is the article that should decide it either way.
First, what a microplastic actually is
The word gets used for anything vaguely synthetic, which is how the conversation went sideways.
A microplastic is a solid plastic particle under 5mm - broken-down polyethylene, polyester, polypropylene. The defining trait is that it doesn't dissolve. It fragments. It gets smaller and smaller, passes straight through wastewater treatment, and ends up in rivers, soil, fish, and eventually us.
Two questions decide whether something counts: is it solid, and does it stick around?
Hold onto those. They're the whole argument.
The bit most sheet brands skate over
A laundry sheet is concentrated detergent held together in a film that dissolves when it hits water.
Something has to do that job. In virtually every laundry sheet on the market - and in the outer film of every laundry pod - that something is polyvinyl alcohol, or PVA. It's synthetic.
Which raises an obvious question about the brands stamping "plastic-free" across the front of the box.
If a sheet holds its shape in your hand and disappears in your machine, a soluble synthetic polymer is doing that. There is no plant that produces a self-dissolving detergent film. When you see "plastic-free" on a dissolvable sheet, the honest translation is usually "no plastic packaging" - which is true, and worth having, and not what most people think they're reading.
We'd rather just tell you.
What's actually in the sheet
From our supplier's safety data sheet, by weight:
- Sodium Dodecyl Sulfate — 58%. The surfactant. The thing that actually lifts dirt off fabric.
- Fatty Alcohol Polyglycol Ether — 17%. A second surfactant, for grease and oils.
- Polyvinyl Alcohol — 15%. The soluble polymer that forms the sheet. The one this article is about.
- Water — 9%.
- Parfum — 1%.
Five ingredients and water. No bleaches, no phosphates, no optical brighteners, no dyes. Non-bio, so it suits sensitive skin and baby clothes. Vegan and cruelty-free. Septic-safe, which matters if you're on a private treatment system rather than mains.
Compare that to the back of a bottle of supermarket liquid sometime.
So does PVA count as a microplastic?
No - and for a substantive reason, not a loophole. PVA doesn't fragment into particles; it dissolves into solution. EU regulation on intentionally added synthetic polymer microparticles specifically excludes soluble polymers for exactly that reason. Chemically it behaves nothing like a shard of polyethylene.
That's the first of our two questions answered. It isn't solid.
The second question is harder.
Dissolving isn't the same as disappearing
Once PVA dissolves, it's still a synthetic polymer in the water. Whether it then breaks down depends on what happens at the treatment plant - and that's where researchers genuinely disagree.
In 2021, researchers at Arizona State University published an estimate that a substantial share of PVA from laundry and dishwasher pods passes through US wastewater treatment intact. It was picked up widely, and it's the source of most of the concern you've encountered.
It has also been heavily criticised - the study modelled rather than measured, and later work argues PVA breaks down well where treatment plants host microbial populations adapted to it, which many do. We've set out that evidence in detail in our full piece on PVA, including the regulatory reviews and the problems with how these tests are designed.
Our honest read: PVA is not conventional microplastic pollution, it does biodegrade under the right conditions, and how reliably that happens across every treatment plant is not fully settled.
What we've tested, and what we haven't
This is the part where most brands would produce a certificate and move on. We're going to show you ours and then tell you what it doesn't cover.
What we have. Our sheets were tested by the Guangdong Detection Center of Microbiology in December 2021 under GB/T 15818-2018, a national standard for surfactant biodegradability. Activated sludge from a working sewage treatment plant was acclimated, our actual product was introduced, and the reduction in surfactant was measured. Result: 99.8% biodegradation at seven days. The control substance came in at 99.7%, confirming the test ran valid.
We also hold an SGS report from March 2023 confirming the sheets pass EU RoHS limits — no lead, mercury, cadmium, hexavalent chromium or restricted phthalates detected.
What we don't have. That test measured the surfactants — 75% of the sheet. It did not measure the PVA.
So on that remaining 15%, we're relying on the general scientific literature, the same as everyone else selling a dissolvable format. We don't have product-specific data, and we're not going to pretend a surfactant test covers it.
We've asked our supplier for PVA-specific testing. When we have it, this page gets updated. If it comes back unfavourable, this page still gets updated.
How to judge any brand, including us
Four questions. They take about a minute and they'll tell you more than any amount of packaging.
- Is there a full ingredients list, with percentages? If a brand won't publish one, ask yourself why.
- Does it say "plastic-free" on a dissolvable sheet? Ask what the film is made from. The answer is revealing either way.
- Is "biodegradable" attached to a named standard? A standard, a test, a lab, a number. Unqualified, the word is decoration — there's no agreed definition and nobody checks.
- Does the test actually cover the ingredient you're worried about? Nobody asks this, and it's where most certificates quietly fall short. Ours included, and we've told you where.
"Should I just use powder in a cardboard box?"
It's the reasonable next question, and it deserves a real answer rather than a dismissal.
Powder genuinely avoids soluble polymers. But it brings its own trade-offs: it's mostly heavy filler, so you ship far more weight for the same number of washes; it's notorious for failing to dissolve fully in cold cycles, which is where most of the energy saving in laundry lives; and mainstream powders very often carry the optical brighteners, bleaches and dyes ours deliberately leaves out.
There's no format with zero trade-offs. The question is which trade-off you'd rather make — and for most households, a lightweight, cold-water-capable, additive-free sheet in kraft paper is the better one.
Where that leaves you
If you came here worried that laundry sheets are secretly shedding plastic into the sea, the answer is no. No solid particles, nothing that fragments, and three quarters of the sheet independently tested at 99.8% biodegradation in a week.
If you came here wanting a brand that won't overstate its case, you've just read one telling you exactly where its own evidence stops.
Sixty sheets. One per wash. Kraft paper packaging, no plastic bottle. Non-bio, no bleaches or optical brighteners. Works from 30 to 60 degrees plus cold and hand washing. Septic-safe. Next-day delivery in Ireland.
And if you'd rather not take our word for any of it: 30-day money-back guarantee. Use them, and if they don't clean as well as what you're using now, email us and we'll refund you. If you subscribe, you can cancel any time by email or live chat — no fees, no notice period.
One box, thirty days, nothing to lose but a plastic jug.
Frequently asked questions
Do laundry detergent sheets contain microplastics?
No solid plastic particles. They use PVA, a water-soluble synthetic polymer that EU regulation excludes from the microplastic definition because it dissolves rather than fragmenting.
Do Emerald Homes sheets contain PVA?
Yes — 15% by weight. It forms the sheet. Every dissolvable sheet and pod on the market uses a soluble polymer of some kind.
Is PVA bad for the environment?
It biodegrades under suitable conditions, though how completely that happens at every treatment plant is debated. It is not conventional microplastic pollution.
Are your sheets biodegradable?
The surfactants are: 99.8% at seven days under GB/T 15818-2018, tested on our actual product. That test did not cover the PVA, and we don't yet have PVA-specific data.
Are laundry sheets better than plastic bottles of liquid detergent?
On packaging waste and transport emissions, clearly. Liquid detergents also contain synthetic polymers, so the comparison flatters liquids less than people assume.
What if they don't work for me?
30-day money-back guarantee, and subscriptions can be cancelled any time with no fees.