How to wash silk without damaging it: a complete guide

To wash silk — a sleep mask, a pillowcase, sheets or a garment: cold or lukewarm water, 30°C (86°F) maximum, a few drops of silk-specific soap or mild sulphate-free shampoo, no rubbing, a long rinse in clear water, then press it in a towel without wringing and dry it flat, away from the sun and radiators. A machine is still possible for larger pieces, on a delicate cycle at 30°C, in a mesh bag, with an enzyme-free detergent and minimal spin. Each step is detailed below, piece by piece.

How to wash silk by hand: the step-by-step method

Hand washing is the only recommended method for natural silk. It takes less than five minutes and preserves the fibres far better than a machine cycle, even on a delicate setting.

What you need

• A clean bowl or sink
• Cold or lukewarm water (maximum 30°C / 86°F)
• Silk-specific soap, or a mild sulphate-free shampoo
• A clean, dry towel

The steps

1. Fill the bowl with cold water. Temperature is the first critical point. Above 30°C, silk fibres begin to shrink and lose their lustre.
2. Add a few drops of mild detergent. Silk-specific soap is ideal. A sulphate-free shampoo works equally well. Avoid regular laundry detergent — its pH damages silk's structure.
3. Submerge the mask and rub very lightly. Between your fingers, gently, a few seconds is enough. Do not scrub, do not wring, do not squeeze.
4. Rinse with cold water until the water is completely clear.
5. Remove excess water by gently pressing the mask in a clean towel — never by wringing it.
6. Dry flat, away from direct light and any heat source.

Washing silk with shampoo: yes, on one condition

Yes, a mild shampoo washes silk very well, and it is the best option when you have no silk detergent at hand. Silk is a protein fibre, like hair, and a sulfate-free shampoo cleans it without stripping it. The condition: choose it sulfate-free, with no nourishing agents or silicones, and use very little of it.

• A few drops in a bowl of cold or lukewarm water, 30 °C at most, never directly on the fabric.
• Three to five minutes of soaking, pressing gently. No rubbing.
• A long rinse in clear water, longer than seems necessary: it is poorly rinsed product that stiffens silk.
• No wringing: press between two towels, then dry flat, away from sun and radiators.

Avoid nourishing or anti-frizz shampoos, whose coating agents stay in the fibre, and conditioner used as a detergent. Conditioner has another role, a recovery bath for silk that has turned rough, explained further down.

How to wash a silk sleep mask: specific precautions

A silk sleep mask has particularities compared to a scarf or silk garment. Its elastic strap and small size require a few additional precautions.

• Do not soak for more than 3 to 5 minutes — prolonged immersion weakens the fibre
• Do not pinch the strap — stretching it can deform it
• Do not dry hanging by the strap — always dry flat to maintain shape
• Do not iron directly on silk — if necessary, iron through a damp cloth, on a low setting

How to wash a silk pillowcase

The method is the same as for a scarf or a mask, but three specifics explain most ruined pillowcases.

The weight of water. A pillowcase is large, and soaked it becomes heavy — while silk loses up to 20% of its strength when wet. Never lift a wet pillowcase by one corner: support it with both hands, press it between two towels rather than twisting, and dry it flat.

Frequency is a trade-off, not a rule. A pillowcase receives sebum, perspiration and evening skincare every night. Washing too often multiplies the passages through the moment the fibre is weakest; washing too rarely lets sweat and sebum oxidise on a protein fibre, which is where yellow marks and gradual weakening come from. Weekly is the usual benchmark — adjust to what your skin leaves on the fabric.

The evening skincare trap: benzoyl peroxide. This is the point almost nobody mentions, and it is irreversible. Benzoyl peroxide, found in many acne treatments, is a strong oxidiser. On skin its action is temporary. On textiles it is permanent: it bleaches dyes and leaves pale or orange marks no wash will recover. That is why dermatologists advise a white or light pillowcase for patients on this treatment.

On silk it goes further than colour. Fibroin is particularly sensitive to oxidisers: peroxide attacks the protein at tyrosine residues, and prolonged exposure degrades the fibre itself. Let the treatment absorb fully before lying down, or keep a dedicated pillowcase for it. The same applies to anything strongly oxidising or alkaline — bleach, "active oxygen" stain removers, enzyme detergents. Silk being a protein, a protease does not tell the stain from the fabric.

How to wash silk sheets

Silk sheets follow the same rules as a pillowcase, but their size changes how you go about it. Once soaked, a sheet becomes heavy, and silk loses up to 20% of its strength when wet: that is when it gets damaged, by lifting it by a corner or wringing it. For a piece this size, the machine is often the most practical option, provided you take these precautions:

• a silk or delicate cycle, 30°C (86°F) maximum, with minimal spin;
• a silk-specific detergent, free of protease enzymes and active oxygen, in a small dose;
• the sheet washed on its own or with other silk pieces, in a large laundry bag if your drum allows it;
• when you take it out, support it with both arms, never pull it by a corner;
• dry it in the shade, spread flat over a drying rack, never in the tumble dryer or in direct sun.

How often follows the same logic as the pillowcase: the usual benchmark is weekly, adjusted to how warm your nights are and what your skin leaves on it.

Washing silk in a machine: possible or not?

Technically, some washing machines offer a "silk" or "delicate" cycle at 30°C. In practice, this isn't recommended for a silk sleep mask — for two reasons.

First reason: mechanical agitation, even minimal, creates friction that silk doesn't handle well over time. The surface progressively loses its lustre and satiny feel. Second reason: the elastic strap can deform or tangle in the drum.

If you do opt for the machine, use a laundry bag, a delicate cycle at 30°C maximum, and silk-specific detergent. Dry flat — never tumble dry.

If you machine-wash other silk pieces — a garment, a pillowcase — three precautions make a delicate cycle genuinely safe: a detergent free of protease enzymes and oxygen bleach (percarbonate, found in many stain removers, attacks protein fibres), a mesh laundry bag or silks washed only with other silks, and minimal spinning.

One laundry-trade trick to finish: a cool rinse with a splash of white vinegar brings the fibre back to its balanced pH and neutralises detergent residue. It is that residue, far more than the water itself, that leaves silk dull after a wash.

How to wash mulberry silk specifically

Mulberry silk is the highest quality silk — produced by the Bombyx mori silkworm fed exclusively on mulberry leaves. Its structure is more uniform and more resilient than wild silks, making it slightly more tolerant of repeated washing. It handles repeated hand washing well, provided the basics are respected: cold water, no wringing, dry flat.

22 momme mulberry silk — the density used in the Maison Noctya mask — retains its softness and shape for several years if care instructions are followed correctly.

Can you wash silk with bar soap or soap flakes?

It is the most common instinct, and it stiffens more silk than anything else. Traditional soap — Marseille soap, castile soap, plain flakes — is not aggressive to the fibre. The problem is what it becomes in your water. Soap is a salt of fatty acids, and in hard water calcium reacts with them to form insoluble lime soap. It is the same soap scum that rings a bathtub, it does not rinse out, and it builds up wash after wash.

A detergent made for delicates carries two things soap does not — a chelating agent that locks up the calcium before it can react, and an anti-redeposition agent that stops loosened minerals re-attaching during the rinse. Without them the fabric hardens and the colour goes flat, the even dullness people read as dead silk when the fibre is only coated.

The same goes for recipes built on bicarbonate of soda or washing soda: both are alkaline, and silk is a protein. If you have already washed this way, the piece is not lost — what stiffens it is a deposit, not wear.

Silk mask care: what to absolutely avoid

Normal machine wash cycle

A cotton or synthetic cycle at 40°C or above irreparably damages silk: shrinkage, loss of sheen, rough texture. One mistake is enough.

Tumble dryer

The heat of a tumble dryer destroys silk fibres within minutes. Even at low temperature, the mechanical movement is too aggressive. Always air dry, flat.

Bleach and enzymatic detergents

These products dissolve proteins — and silk is a protein. Bleach destroys silk fibre in seconds. Enzymatic detergents do the same, more slowly.

Direct sunlight for drying

UV rays progressively fade silk and weaken the fibres. Always dry in the shade or in a well-ventilated space.

Rubbing

Rubbing silk — even with a soft fabric — creates micro-friction that dulls the surface. Press, don't rub.

Washing mulberry silk: how often?

A silk sleep mask used daily should be washed every one to two weeks. Silk doesn't retain odours as easily as cotton — a lower washing frequency is perfectly sufficient and better preserves the material over time.

Between washes, air the mask for a few hours rather than immediately putting it back in its pouch.

A word on sweat: as it dries, sweat turns alkaline and, combined with the aluminium in antiperspirants, it weakens the fibre. That is where the yellow marks on collars and pillowcases come from. After a very warm night, a quick cool-water rinse the same day keeps it from setting in, without needing a full wash.

Removing stains from silk: oil, blood, water marks

On silk, a stain is treated before washing, and almost always without rubbing: rubbing wears the surface and pushes the stain deeper into the weave.

An oil or grease stain

Do not add water; absorb it. Cover the stain with talcum powder or cornflour (cornstarch), leave it for several hours — overnight if it has set — then brush the powder off with a soft brush, without rubbing. If a shadow remains, repeat before washing the piece.

A blood stain

Cold water only. Heat sets blood in the fibre, the way it cooks an egg white, and a cooked egg white cannot be undone. Dab with cold water before any wash.

Other stains

The dry cleaners' method: dab with equal parts white vinegar and lukewarm water, then rinse. Avoid working soap into a lather on the stain; only as a last resort, a single drop of washing-up liquid, dabbed without foam, followed by a thorough rinse.

A water mark

A water mark is not a rinsing fault. When only one area gets wet, the water carries minerals and residues to the edge of the wet patch, where everything dries in a ring. To remove it, re-wet the whole panel, seam to seam, with a mister and distilled water (tap water adds minerals), until it is damp everywhere without being soaked. Blot between two white cloths, without rubbing, then dry flat in the shade.

Finally, no bleach and no enzyme or active-oxygen stain remover, for the reasons given above.

Silk gone rough or dull? Here is how to bring it back

This is the most common mishap: silk put through the wrong cycle, or washed with the wrong detergent, that comes out stiff "like paper". The good news is that in most cases the fibre is not dead. It is coated in detergent or hard-water residue, and that residue comes off.

Step 1, the vinegar bath. In a basin of cool water, add about a quarter cup of white vinegar per gallon. Submerge the piece, swirl gently for five minutes, then rinse in cool water. The mild acidity dissolves the residue and revives the lustre. The smell disappears completely as it dries.

Step 2, the conditioner bath. Silk is a protein, like hair. Dilute one or two tablespoons of mild hair conditioner in a basin of cool water, soak for 10 to 20 minutes, then rinse thoroughly — longer than feels necessary. It is under-rinsed conditioner that stiffens silk.

If the hand feel is still papery after the first round, repeat both steps: the fibre often responds better to a second bath.

Be clear-eyed, though, about what does not come back: lost dye, the white streaks left by twisting in a drum, a heat-set sheen that vanished the first time the fabric got wet. Those are damage to the fibre or the dye rather than residue, and only a textile professional — redyeing, restoration — can still do anything about them.

Further reading: how to choose a silk sleep mask, our comparison of seven masks checked in September 2026.

How to iron silk without marking it

Dried flat, silk often finds its shape on its own and the iron becomes unnecessary. If you do need to iron, start with the care label: it sets the temperature. Ginetex, the international association that manages care-labelling symbols, puts it plainly: the maximum temperature is chosen from the care label, not from the fibre content.

The "wool/silk" setting is the two-dot iron: 160°C at most on the sole plate. Ginetex then advises ironing under a moderately damp pressing cloth, without heavy pressure; steam is allowed. Never the three-dot "cotton/linen" setting, which goes up to 210°C.

The gap is not mere caution. Laboratory measurements published in 2024 in npj Heritage Science place silk's glass transition at 178°C and the onset of its decomposition at 220°C. Taken on dry silk, in an oven, these figures are not ironing instructions; they explain why the cotton setting, which exceeds the first threshold and approaches the second, has no business on silk.

Three habits prevent marks:

• Iron on the reverse. Satin-finish silk shines because its surface is smooth; the sole plate can leave shiny patches or its own imprint. Ginetex advises the reverse side or a pressing cloth for shiny pieces.
• Keep the iron moving, without resting it or pressing down.
• Never spray water on one small area. The water carries minerals and residues to the edge of the damp patch, where they dry into a ring. Dampen the whole piece evenly, or use the pressing cloth.

For simple creases, steam held a few centimetres away is often enough. A sleep mask needs no iron at all: dried flat, it recovers its shape.

Storing silk: between wears, and from one season to the next

A piece worn once does not need washing. It should not go straight back among clean clothes either: let it air overnight on a hanger, away from light, so the moisture from your body can leave it, then put it away.

Do moths eat silk? Yes. The common clothes moth, Tineola bisselliella, counts silk among its foods, along with wool, linen and fur. But it prefers to lay its eggs on dirty fabric: what draws the larvae is the sweat, skin residue and moisture left on the fibre, more than the fibre itself.

Hence the rule for long-term storage, when the seasons change: wash before storing, not only before wearing again. Clean, dry silk in a breathable cotton bag makes a poor meal. Worn silk shut away in a plastic box keeps its moisture and its traces: exactly what the larvae are looking for.

Store it in the dark. Light damages silk even without direct sun: visible light is enough. And silk that has already aged deteriorates faster under light than new silk, according to a conservation study published in 2024 in npj Heritage Science. Chinese museum standards limit the lighting of displayed silk to 50 lux.

Fold rather than hang on a thin hanger. Silk has little elasticity: once stretched, it stays stretched. On a narrow hanger, the whole weight of the garment rests on the shoulders; a wide, padded hanger or loose folding avoids that stretching.

Frequently asked questions about washing silk

At what temperature should silk be washed?

Cold, or lukewarm at 30°C maximum — and 30°C is a ceiling, not a target. Above it the fibres tighten and the lustre goes, irreversibly. Hot water also sets stains: blood in particular binds permanently to the fibre the moment it warms.

Which detergent to use for washing silk?

A mild pH-neutral detergent made for delicates, or failing that a few drops of a gentle sulphate-free shampoo. Absolutely avoid: regular laundry detergent, enzymatic products, fabric softener, bleach. Enzymes are proteases, and silk is a protein — they do not tell the stain from the fabric.

How to dry silk without damaging it?

Flat, on a clean towel, out of direct sun and away from any heat source. The tumble dryer and the radiator are the two enemies: they break the fibre irreversibly. Silk dries fast — a few hours is enough.

Can silk be ironed?

Usually there is no need: dried flat, it finds its shape on its own. If a crease persists, follow the care label; failing that, use the wool/silk setting (two dots, 160°C at most), on the reverse, under a slightly damp pressing cloth, without pressing down. Never the cotton/linen setting.

Do moths eat silk?

Yes: the clothes moth counts silk among its foods. But it lays mainly on dirty fabric, drawn by sweat, skin residue and moisture. Wash before long-term storage, and store silk dry, in a cotton bag rather than a closed plastic box.

How to clean silk if it has a stain?

It depends on the stain. For a greasy stain (oil, butter, serum), do not wet it first: sprinkle talcum powder or cornstarch over it, leave it for several hours — overnight if the stain has set — then brush it off gently. The powder draws the grease out of the fibre. For blood, cold water only, never warm. For anything else, dab with equal parts white vinegar and lukewarm water, without rubbing or working up a lather, then rinse in cool water by pressing and dry flat. One exception: treatments containing benzoyl peroxide (acne products) are bleaching agents, and the pale mark they leave on dyed silk is permanent.

How to wash a silk mask without deforming it?

Hand wash gently, without wringing or stretching. Rinse by pressing gently. Dry flat on a clean towel — never hanging by the strap. The mask returns to its exact shape as it dries.

How often to wash a silk pillowcase?

The usual marker is weekly, but it is a trade-off rather than a rule: washing too often multiplies the moments when the fibre is at its most fragile — wet, silk loses up to 20% of its strength — while washing too rarely lets sweat and sebum oxidise on the fibre, which yellows and weakens it. Adjust to what your skincare leaves on the fabric, and rinse in clear water the same day after a very warm night.

→ Discover the Maison Noctya 22 momme mulberry silk sleep mask