Rug stain removal

We treat the stain, not the rug

Selective stain removal means applying a targeted product to the stain alone — black soap, ox gall, percarbonate — according to its nature, without touching the rest of the rug. What dissolves a fatty substance does not break down a protein, and no product suits everything.

The symmetrical mistake is to shampoo the whole rug for a five-centimetre stain. You then get exactly what you were trying to avoid: a lighter area, or a ring, because the boundary between the local treatment and the rest shows.

The three actions that make it worse

Rubbing. It is the first reflex and the most destructive. Rubbing drives the stain down towards the foundation, breaks the surface fibres, and on damp wool it opens the scales: the area felts and stays visible even once the stain has gone.

Hot water. On protein stains — blood, milk, egg, urine — heat coagulates the protein and fixes it: what would have come out in cold water becomes permanent. And above 40 °C, wool felts and the colours run. The water used for stain removal is cold, always.

Household products. Washing powder, degreaser, all-purpose cleaner, bleach: all alkaline, often well beyond pH 8. Yet wool is washed between pH 5 and 7; beyond that, the scales lift, the fibre swells, yellows and can release its dyes. Bleach oxidises keratin: the colour loss it causes is irreversible.

What to do within the hour

First remove the solid, with a spoon or the back of a knife, lifting towards the centre so as not to spread it.

Then absorb. White absorbent paper or a white cotton cloth — never a coloured textile, which can bleed in its turn — laid flat, firm pressure, replace it, start again. Blot from the edge towards the centre, to stop the stain gaining ground.

And stop there. No hot water, no product, no salt, no white wine on red wine. Photograph the stain and tell us what was spilt: an identified stain is treated far better than an anonymous stain that three products have already been over.

The six stains we see the most

Red wine. Blot immediately, cold water only. The tannins fix as they dry and leave, on an ivory ground, a pink halo that stays once the stain has gone. It is stain removal in two stages: the matter, then the colouring.

Coffee and tea. The same tannins. The trap is the sugar and the milk: their sticky residue leaves an area that looks clean and then greys, because it picks up the dust.

Ink. Do not wet it: water spreads it and doubles the size of the problem. Blot dry, working in from the edge of the stain. Ballpoint ink is treated with a solvent; pigmented ink behaves like paint and often only comes out in part.

Grease and oil. No water: it does nothing on a fatty substance. An absorbent powder — fuller's earth, talc — left to work and then vacuumed off, and only then a very dilute black soap, rinsed out.

Blood. Cold water, exclusively. It is a protein: with heat it coagulates and fixes permanently. Ox gall is the workshop product for this case.

Candle wax. Let it harden, or cool it with a bag of ice cubes, then break the wax and remove the fragments. Above all, no hot iron through a sheet of paper: on wool that is heat plus moisture, hence felting, and the melted wax runs down into the foundation.

Black soap, ox gall, percarbonate — and the ring

Three products cover most cases. Black soap works on fatty substances; it is a soap, therefore alkaline, and it is used dilute, for a short time, then rinsed until neutrality. Ox gall is the product for protein and pigment stains, gentle on wool and well known to textile restorers. Percarbonate is the most aggressive of the three — alkaline and oxidising: very dilute, strictly local, never on silk nor on an unstable dye.

That leaves the common enemy: the ring. When an area is wetted, the dissolved soiling migrates towards the edge and settles there, the edge being the last to dry. You get a ring darker than the original stain — it is the most frequent pattern on the rugs that arrive here "already spot-treated".

Two ways of avoiding it: work on the smallest possible area with directed drying, or wash the whole rug when the stain is old, extensive or in the centre. On a silk rug the question does not arise: local stain removal there almost always leaves a ring.