How to wash silk without ruining it: by hand, in the machine, with shampoo

Quick answer: check the care label first. Then use water no warmer than 30°C (86°F), a few drops of an enzyme-free delicates detergent or a sulfate-free, silicone-free shampoo, a few minutes of soaking with no rubbing, and a clear-water rinse. Press the piece in a towel, never wring it, and dry it flat in the shade, away from heat. In the machine: silk or delicate cycle, 30°C (86°F), a mesh bag, the lowest spin.

Dry silk is strong. Wet silk loses up to 20% of its strength, and anything you stretch at that point stays stretched. Washing silk well comes down to those few minutes when it is in the water, then in your hands.

This guide shows how to wash silk without ruining it, in the order you'll need it: the label, hand washing, the machine, the right product, drying, ironing and stains, then piece-by-piece settings (garments, pillowcases, sheets, sleep masks) and the eight mistakes that ruin silk. Every rule comes with its reason, and our sources are listed at the bottom.

How to wash each silk item: the table

For everything: no tumble dryer, no radiator, no direct sun, no bleach, no enzyme (biological) detergent, no fabric softener.

Before you wash: read the care label in ten seconds

The label outranks this guide. If it is stricter, follow it. The symbols are managed by GINETEX, the international care-labeling association. For silk, four readings are enough:

• The number in the tub is the maximum water temperature in °C. Colder is always fine.
• A hand in the tub means hand wash only.
• Two bars under the tub mean a very gentle cycle (GINETEX gives wool as the example): your machine's wool or silk program. One bar means a delicate cycle with reduced mechanical action.
• A crossed-out tub means no washing in water. This guide doesn't apply; take it to a professional cleaner.

No label, or one you can't read? The safest choice is hand washing, at 30°C (86°F) or below.

How to hand wash silk at home: the 6-step method

This is the core method, and it works for a garment, a scarf, a pillowcase or a sleep mask. It takes a few minutes, not counting drying time.

What you need

• a clean basin or sink;
• cool or lukewarm water, 30°C (86°F) at most;
• an enzyme-free delicates detergent, or a mild sulfate-free, silicone-free shampoo (how to choose);
• two clean, dry towels, ideally light-colored.

The steps

1. Fill the basin with water at 30°C (86°F) or below. Any warmer and the weave tightens, the silk loses its sheen and the dye can bleed, and none of that can be undone. 30°C is a ceiling, not a target: below it, slightly lukewarm water cleans better than ice-cold water, so you need to work the fabric less.
2. Mix the product into the water before the silk goes in. A few drops are enough. Never pour detergent straight onto the fabric.
3. Submerge and press gently for a few minutes, without rubbing. Swish the piece through the water, press, release. Don't twist, don't wring.
4. Rinse in clear water at the same temperature until no suds remain. Product left in the fiber stiffens and dulls silk. The one exception is a product sold as no-rinse: follow its instructions.
5. Press it in a towel. Lay the piece flat on a towel, roll them up together and press. The water moves into the towel without the fiber being twisted.
6. Dry flat, in the shade, on a dry towel or a rack, away from any heat. Why not on a hanger.

Can you machine wash silk? The exact settings

Yes, when the label allows it: a garment labeled for it, a pillowcase, a sheet. Appliance makers plan for it: Siemens recommends a delicate cycle or its dedicated silk program, with a very low spin speed. The settings:

• Silk, wool or delicate cycle, 30°C (86°F) max, lower if the label says so.
• Spin at its lowest, or off. We don't give an rpm figure: we found no neutral source to set one.
• A mesh laundry bag for each piece, or silk washed only with other silk.
• A liquid detergent with no enzymes and no oxygen bleach, in a small dose (see below).
• No fabric softener: it leaves a film on the fiber and changes how it feels.
• Dry flat, in the shade. Never in the tumble dryer, even on a gentle setting.

A machine's "hand wash" cycle is not hand washing: it agitates less, but it still agitates. For a small piece like a sleep mask, the basin is the safer choice.

What to wash silk with: three things to check on the detergent bottle

Silk is a protein, fibroin. The right product is one that leaves proteins alone. Three checks:

• No enzymes. "Bio" or biological detergents contain proteases, enzymes that digest protein stains. They can't tell the stain from the fabric, and the damage, holes and thinning, builds up wash after wash. In the EU, a detergent must list enzymes on its pack whatever the amount (EU Detergents Regulation 648/2004). Elsewhere, look for "enzyme-free".
• No oxygen bleach and no chlorine bleach. Silk handles oxidizers badly: chlorine bleach breaks the fiber and yellows it, and the sodium percarbonate in "oxygen" stain removers releases hydrogen peroxide, another oxidizer.
• A neutral pH. Alkaline products such as washing soda or baking soda wear the fiber down. A pH-neutral "wool and silk" or delicates wash is right. A "silk-only" product isn't essential: several brands sell one product for both wool and silk, which are both protein fibers.

Rinse or no-rinse? Read the instructions, because that is the real difference between products. Some are made to stay in: Eucalan calls for a 15-minute soak in lukewarm water and no rinse, and Soak works the same way. Others, like The Laundress Delicate Wash, need a thorough rinse. Shampoo always needs rinsing.

Can you wash silk with shampoo? Yes, if it's sulfate-free and silicone-free

It's the best stand-in when you have no silk wash, and there's a reason it works: hair and silk are both protein fibers, and a mild shampoo is made to clean a protein without stripping it. You only need to pick the right bottle, and the answer is in the ingredient list (INCI names) on the back:

• no sulfates, such as Sodium Lauryl Sulfate or Sodium Laureth Sulfate;
• no silicones, whose names usually end in "-cone" or "-siloxane", such as Dimethicone or Cyclopentasiloxane: they coat hair, and they would stay in the fiber;
• ideally gentle surfactants, such as Cocamidopropyl Betaine.

The method is the basin method: a few drops mixed into water at 30°C (86°F) or below, a few minutes, then a long rinse, longer than feels necessary. Skip "nourishing" or anti-frizz shampoos, and never use conditioner as a detergent.

Can you wash silk with bar soap, castile or Marseille soap?

It's the most common instinct, and the one that stiffens the most silk. Soap doesn't attack the fiber. The problem is what it turns into in your water: soap is a salt of fatty acids, and in hard water, calcium reacts with those fatty acids to form lime soap, the same insoluble scum that rings a bathtub. It doesn't rinse out, and it builds up wash after wash.

A delicates detergent carries what soap lacks: a chelating agent that locks up calcium before it reacts, and an anti-redeposition agent that keeps loosened minerals from settling back on the fabric. Without them, silk hardens and its color goes flat. In soft water the risk is low. In hard water, keep the soap for the rest of the laundry.

Wringing and drying silk: the moment it gets damaged

Wet silk has lost up to 20% of its strength, and it is heavy with water. Its elasticity is poor: stretched even a little, it stays stretched. Those two facts give you every drying rule.

• Never wring. Roll the piece in a towel and press.
• Never lift a large wet piece by one corner. Carry a wet pillowcase or sheet flat, in both hands.
• Dry flat, not on a hanger. A wet dress pulls on its shoulders with its full weight.
• In the shade. UV breaks the structure that gives fibroin its strength, and yellowing comes from the same reaction. A 2024 conservation study in npj Heritage Science also shows that visible light alone eventually degrades silk.
• No tumble dryer, radiator or hair dryer. Heat and tumbling come on top of the moment the fiber is weakest.

How to iron silk without marking it

Dried flat, silk usually has few creases. If you do iron, the label sets the temperature: GINETEX states it should be chosen from the care label, not from the fiber. With no label:

• Two-dot setting, wool/silk: 160°C (320°F) at most. Never the cotton/linen setting. Steam is allowed at this setting.
• Inside out, or the sole plate leaves shiny patches on satin-finish silk.
• While it is still slightly damp, in short passes, without pressing down, or under a clean cloth.
• Never over a stain: heat sets it.

Why the caution? A 2024 lab study in npj Heritage Science works with a glass transition of 178°C (352°F) for silk and an onset of decomposition at 220°C (428°F). Those figures describe dry silk heated in an oven, not silk under an iron, so they're not ironing instructions. But they show that the silk setting, 160°C, leaves only an 18°C margin.

Removing stains before you wash: oil, blood, water marks

Treat a stain before washing, and almost always without rubbing: rubbing wears the surface and pushes the stain deeper into the weave.

Oil, serum, greasy makeup

Don't add water: absorb. Cover the stain with talcum powder or cornstarch, leave it several hours, overnight if it has set, then lift the powder off with a soft brush, without rubbing. Repeat if a shadow remains, then wash.

Blood

Cold water only. Heat sets blood into the fiber the way it cooks an egg white, and a cooked egg white can't be undone. Dab with cold water before any wash.

Other stains

Dab with equal parts white vinegar and lukewarm water, then rinse. Avoid working soap into a lather on the stain.

A water mark

It forms when only one area gets wet: the water carries minerals and residue to the edge, where everything dries in a ring. Re-wet the whole panel, seam to seam, with distilled water, then dry flat. The full method is in our guide to fixing stiff or dull silk after washing.

Benzoyl peroxide acne treatments

It's an oxidizer. On skin the effect passes; on dyed fabric, the pale or orange mark it leaves is permanent, and on silk it attacks the fiber too. Let the treatment absorb before you lie down, or give it its own light-colored pillowcase.

Settings item by item

Dresses, blouses, scarves

Label first. If it allows water, the hand method suits all of these; the machine only if the label says so. Treat stains first, dry a dress or blouse flat on a towel, and iron inside out. A lined piece is better left to a dry cleaner. As Elizabeth Pollard, who teaches costume technology at the University of Alabama at Birmingham, told Newswise, unlined silk can be washed, even with shampoo; the same article advises dry-cleaning anything lined.

How to wash a silk pillowcase

Same method, with two things to know. The first is weight: a soaked pillowcase is heavy, and lifting it by one corner is how it gets stretched. Carry it with both hands, press it between two towels, dry it flat. The second is how often. No neutral source sets a schedule for silk, and two kinds of wear pull against each other: wash often, and the fiber often goes through its weakest moment; wash too rarely, and sweat and sebum yellow and weaken it. Go by what your skin leaves on it: a heavy evening skincare routine calls for more frequent washing than bare skin.

To choose the pillowcase itself: our silk pillowcase comparison. And for sizing: 65x65, 50x70 and other French pillowcase sizes.

How to wash silk sheets in the washing machine

Same rules as the pillowcase, at a bigger scale. A soaked sheet is too heavy for a basin, so the machine is often safer than your arms. Silk or delicate cycle, 30°C (86°F) max, minimal spin, enzyme-free detergent, the sheet on its own or with other silk, in a large laundry bag if your drum allows. Take it out supported in both arms and spread it flat over a drying rack, in the shade.

Silk sleep masks

The mask is the easiest silk piece to wash, and it needs it: every night it sits against your skin, your lashes and your evening skincare. We recommend hand washing, not the machine, even on a delicate cycle: for something this small, five minutes in a basin is enough, and it spares the silk the drum's friction and the elastic strap a tangle.

1. Water at 30°C (86°F) or below, a few drops of enzyme-free detergent or mild shampoo.
2. A few minutes of soaking, pressing gently, without rubbing the dome.
3. A rinse in clear water.
4. Press it in a towel, without pulling the strap.
5. Dry it flat, never hung by the strap. No iron: it doesn't need one.

We suggest one wash a week for a mask worn every night, and letting it air for a few hours before it goes back in its pouch.

That routine is what the Maison Noctya silk sleep mask is built around: 22 momme mulberry silk on both sides, an elastic strap wrapped in silk with no buckle and no Velcro, and a 19 momme mulberry silk pouch to keep it in between nights. The Duo, two masks, lets you wear one while the other dries.

How to wash mulberry silk

Mulberry silk, from the Bombyx mori silkworm, washes exactly like any other silk. Its filament is finer and more even than wild silks, which is where its softness comes from, but that doesn't make it tougher in the wash: same 30°C (86°F) ceiling, same no-wringing rule. What it is and what the grades mean: what is mulberry silk. Momme weight doesn't change the method either: here's what 22 momme means.

8 mistakes that ruin silk in the wash

1. A cotton cycle, or 40°C (104°F). Above 30°C, the weave tightens and the sheen goes, for good.
2. A biological (enzyme) detergent. Proteases digest fibroin, a little more each wash.
3. Chlorine or oxygen bleach. Oxidizers: the fiber breaks and yellows.
4. Bar soap in hard water. It leaves a deposit that stiffens silk.
5. Fabric softener. A film on the fiber that changes its feel.
6. Wringing it out. Just when silk has lost up to 20% of its strength.
7. Tumble dryer, radiator, direct sun. Heat and UV attack the fiber's structure.
8. An iron that's too hot, or set down on a stain. Two dots at most, inside out, never on a stain.

Did your silk come out stiff or dull?

Often the fiber isn't damaged: it's coated in detergent or hard-water residue, and that comes off. The diagnosis and the two baths that bring it back are in our dedicated guide: how to fix silk after washing.

Storing silk between wears and between seasons

A piece worn once doesn't always need washing. Let it air overnight, out of the light, before you put it away.

Wash before long-term storage. The common clothes moth, Tineola bisselliella, counts silk among its foods, but it prefers to lay eggs on dirty fabric: what draws the larvae is the sweat, skin residue and moisture left on the fiber. Clean, dry silk in a breathable cotton bag makes a poor meal; worn silk shut in a plastic box is exactly what they're looking for.

Store it folded, in the dark. Visible light damages silk even without direct sun: China's museum lighting standard limits displayed silk to 50 lux. And rather than a thin hanger, which puts all the weight on the shoulders, use a wide hanger or a loose fold.

FAQ: washing silk

How do you wash silk without ruining it?

Check the care label first. Then use water no warmer than 30°C (86°F) and a few drops of an enzyme-free delicates detergent or a sulfate-free, silicone-free shampoo. Soak for a few minutes without rubbing, rinse in clear water, press the piece in a towel without wringing, and dry it flat in the shade, away from heat.

Can you use fabric softener on silk?

No. It leaves a film on the fiber and changes how it feels, so leave it out whether you wash by hand or in the machine.

What temperature should you wash silk at?

30°C (86°F) at most, by hand or in the machine, and lower if the label says so. Any warmer and the weave tightens and silk loses its sheen, for good. Below that ceiling, slightly lukewarm water cleans better than ice-cold. The one exception: treat a blood stain with cold water.

Can you wash silk in warm water?

Lukewarm, yes; hot, no. Keep the water at 30°C (86°F) or below, which feels barely warm to the hand. Hot water tightens the weave, dulls the silk and can make the dye bleed.

Can you machine wash silk?

Yes, if the label allows it: silk, wool or delicate cycle, 30°C (86°F) max, the lowest spin or none, the piece in a mesh bag, an enzyme-free detergent and no fabric softener. For a sleep mask, hand washing is still safer.

What should you wash silk with? Can you use regular detergent?

Only if it has no enzymes and no oxygen bleach: "bio" or biological detergents contain proteases, which digest protein, and silk is a protein. The right choice is a pH-neutral delicates or "wool and silk" detergent. In the EU, enzymes must be listed on the pack; elsewhere, look for "enzyme-free". Failing that, a few drops of a mild sulfate-free, silicone-free shampoo.

Can you wash silk with shampoo?

Yes, with a mild shampoo free of sulfates and silicones: a few drops mixed into water at 30°C (86°F) or below, a few minutes without rubbing, a long rinse, then dry flat. Never use conditioner as a detergent.

How long should you soak silk?

A few minutes is enough with a regular delicates detergent or shampoo. No-rinse products have their own timing: Eucalan, for example, calls for 15 minutes. Follow the product's instructions.

How do you dry silk without damaging it?

Press it in a towel without wringing, then dry it flat, in the shade, away from radiators. Never in the tumble dryer. Wet silk has lost up to 20% of its strength, and once stretched, it stays stretched.

Can you iron silk?

Yes, if the label allows: two-dot setting, wool/silk, 160°C (320°F) at most, inside out, ideally while still slightly damp, without pressing down. Never the cotton/linen setting, and never over a stain.

How do you wash a silk sleep mask?

By hand, at 30°C (86°F) or below, with a few drops of enzyme-free detergent or mild shampoo. A few minutes without rubbing, a rinse, then press it in a towel and dry it flat, never hung by the strap. We suggest one wash a week for a mask worn every night.

Washed well, silk keeps what made you choose it. What the science really says: the benefits of silk for skin and hair. And to choose a mask: our silk sleep mask comparison.

→ Discover the Maison Noctya 22 momme mulberry silk sleep mask

Sources

• GINETEX, care symbols (washing, ironing)
• Siemens, washing silk and wool in the machine (in French)
• Wikipedia, Silk: wet strength loss, elasticity
• Study on the photodegradation behaviors of thermal-aged silk, npj Heritage Science, 2024
• Heritage Park, enzyme detergent and silk
• Regulation (EC) 648/2004, Annex VII A: detergent labelling
• Eucalan, Soak, The Laundress: washing instructions
• Newswise, Costume shop secrets (University of Alabama at Birmingham)
• Tide Cleaners, stained silk
• Wikipedia, Tineola bisselliella