Five ways to tell real wool from industrial wool, without trusting anyone

By Wilfrid Thoumazeau · September 2026

Thousands of rugs are sold today as pure wool, hand-knotted, coloured with plants. Some of them are. Many are not, and the descriptions are word for word the same. After more than twenty years in this trade I can tell you that the words on a label have stopped being useful.

What has not stopped being useful is the rug itself. Everything below is something you can check with your own hands, in thirty seconds, without any expertise and without taking anyone at their word — including us. Four of these work in a shop. The fifth works at home, on a rug you already own.

One: it should shine

Hold the rug where light falls across it at an angle, and move it. Real wool that has kept its natural grease has a low, moving shine, like an animal in good health. It is not the flat sheen of a synthetic fibre and it is not chalky.

Wool that has been scoured hard, bleached, or spun industrially loses that. It goes matt. You will not be able to say why it looks dull — you will simply notice that it does nothing in the light.

Two: it should give

Press your palm into the pile and leave it there. Then run your fingers through it sideways.

Real wool is supple, plush, and it comes back. The fibres bend and stand up again, because the scales along each fibre let it compress and recover under load. Industrially processed wool feels flatter under the hand and stays where you pushed it. This is the same property that decides whether a rug looks worn or lived in after twenty years of feet.

Three: it should not feel felted

Felting is what happens when wool meets heat, agitation and the wrong chemistry. The fibres lock into each other and the pile turns into a mat. You can feel it immediately: instead of separate fibres moving between your fingers, you get a surface that behaves like a sheet.

Some felting is a manufacturing accident. Some of it is deliberate, because a matted pile hides a low knot count. Either way, once wool is felted it does not come back.

Four: it should not be too white

This one is the opposite of what most buyers assume, and it is the tell that imitators almost never think to hide.

A brilliant, uniform white is not a sign of purity. It is a sign of bleaching — a step beyond ordinary washing, more aggressive, applied precisely because the wool underneath was not clean or not consistent. Undyed wool from real fleece is never one white. It is ivory, cream, warm grey, faintly yellow, and it varies within the same rug because it varies between sheep.

When you see a white that has no variation in it at all, you are not looking at wool that was left alone.

Five: spill something on it

This is the test that cannot be imitated, and the only one that gives you a yes or a no.

Tip a black espresso onto the rug — or a glass of red wine; either works. On a piece whose wool has kept its natural grease, the liquid sits on the surface and beads. You have time to fetch a cloth. Wipe it with a little water and there is nothing left. On a rug made from industrially processed wool, the liquid goes into the fibre almost at once, and the mark is permanent.

You do not need to believe anyone. You need an espresso and a cloth.

The reason is chemistry, not craftsmanship. A raw fleece is roughly thirty-five to forty per cent things that are not fibre, and a large part of that is lanolin — the grease the sheep produces to protect itself. Industrial scouring removes almost all of it, using hot water, detergent and often an alkali. That is not carelessness: lanolin is a valuable by-product, sold on to the cosmetics industry. The wool comes out clean, white, and bare.

What remains after that treatment is, at best, shower-proof. The grease is gone and the outer surface of the fibre, which is naturally water-repellent in its own right, has been through a process designed to strip things off it.

We wash our wool with a soap we make ourselves from olive oil and soda. It stays a living wool: still slightly greasy, still supple, still catching the light. The lanolin that remains, together with the intact surface of the fibre, is what makes liquid bead instead of sink. It is not waterproof and we would not tell you it is. It buys you a minute, and a minute is the whole difference between a spill and a stain.

And then there is the arithmetic

A rug of three metres by two represents roughly a month of work for two people at the loom. Before that comes the shearing, the washing, the carding, the hand-spinning, and the dyeing — which is measured in hours per colour, not minutes. After it comes transport, and whatever the seller needs to live on.

We are not going to tell you what anyone else pays their weavers. We will tell you what the work takes, and let you do the division yourself. If the arithmetic does not close, something in the description is not true — and it is usually the wool.

Why we are telling you this

Because the confusion costs us more than it costs you. A buyer who has been disappointed once by a rug sold as natural wool does not go looking for a better one. They conclude the whole category is a story, and they are right to, based on what happened to them.

So run the tests. On our rugs, on anyone’s. The five above are the ones we use ourselves when a piece comes into the showroom, and they take less time to perform than reading a label takes to mislead you.