How do I wash silk?

Silk is a protein fibre, so biological detergent digests it and heat destroys the sheen — but most silk hand washes perfectly well at home.

Difficulty: intermediate
Time: 30 min
Read: 4 min

Short answer

Cool water, a wool or silk detergent, no biological detergent, no bleach and no wringing. Rinse with a splash of white vinegar to restore the shine, roll in a towel and dry flat away from sunlight. Iron damp on the coolest setting, from the reverse.

Silk has a reputation for being impossible at home, and most of that comes from three specific failures: enzymes eating the fibre, heat dulling the surface, and water marking. Each is avoidable. What silk genuinely cannot tolerate is biological detergent, chlorine bleach, high heat and being wrung out.

What you'll need

A silk or wool detergent
White vinegar
Two clean towels
A flat drying space out of sunlight

Step by step

Check the label and test the dye.Some silk genuinely is dry clean only, particularly anything structured or brightly dyed. Dab a hidden seam with a damp white cloth — colour on the cloth means do not wash it.
Never use biological detergent.Silk is protein. The protease enzyme cannot distinguish a protein stain from a protein fibre, and it will thin and weaken the fabric over repeated washes.
Use cool water, around thirty degrees.Hot water dulls the surface irreversibly and can shrink the fabric. Cool, and never a sudden change in temperature between wash and rinse.
Swish gently for a few minutes.Silk does not need soaking or agitation. Move it through the water with your hands for three or four minutes and that is the wash done.
Keep bleach and stain removers away from it.Chlorine bleach destroys silk outright, and oxygen bleach yellows it. Spot treatment on silk is best left to a specialist.
Rinse, then add a splash of white vinegar.About a tablespoon in the final rinse. It removes soap residue and restores the natural sheen that detergent dulls.
Press out the water in a towel.Lay flat on a dry towel, roll the two together and press. Never wring — twisting breaks the fibres and leaves permanent creases.
Dry flat, out of direct sunlight.Sunlight yellows and weakens silk quickly. Hanging a wet silk garment stretches it and leaves hanger marks.
Iron it damp, from the reverse, on the coolest setting.One dot. Dry silk scorches and shines under an iron, and a steam iron can water-mark it. If it has dried, dampen the whole garment evenly rather than spotting it.
Store it away from light and away from wood.Folded in a drawer with acid-free tissue, or on a padded hanger. Bare wood and cardboard both damage silk over time.

Tips

Deodorant and perfume damage silk more than washing does. Let both dry completely before dressing, and never spray perfume onto silk.
Water marks on silk are usually removable by dampening the whole panel evenly and drying it flat, rather than by attacking the mark.
A machine's silk or delicate cycle at thirty degrees with a 400 spin is acceptable for simple silk items, and often gentler than clumsy hand washing.

Common mistakes

Using biological detergent or a stain remover — Enzymes digest the protein the fibre is made of. The damage is cumulative and invisible at first, appearing later as thinning and splits along fold lines.
Hanging it wet to dry — Wet silk is heavy and has almost no recovery. It stretches at the shoulders and along the hem, and the distortion is permanent.

If it doesn't work

Silk has lost its sheen

Cause: Water too hot, or detergent residue — Fix: Rinse again in cool water with a tablespoon of white vinegar and dry flat. Heat damage is not reversible.

Water marks after washing

Cause: Uneven drying — Fix: Dampen the whole panel evenly with a fine mist and dry flat. Treating just the mark usually creates another one.

Shiny patches after ironing

Cause: Iron too hot or used on the right side — Fix: Not reversible. Iron damp, from the reverse, on the coolest setting through a cloth.

Yellowing along folds

Cause: Light exposure or acidic storage material — Fix: Store folded in acid-free tissue away from light. Existing yellowing generally cannot be removed.

Questions people ask

Can silk go in the washing machine?

Simple silk items can, on a dedicated silk or delicate cycle at thirty degrees with a low spin and a mesh bag. Anything structured, lined or heavily dyed should be hand washed or dry cleaned.

Why does my silk smell after washing?

Usually because it was dried slowly in still air. Silk holds moisture, so dry it flat somewhere with air movement, and never leave it rolled in the towel for more than a few minutes.

Is a silk pillowcase worth washing differently?

Yes — cool wash, silk detergent, no biological detergent, and dry flat. Washed like ordinary bedding at sixty degrees it will be ruined in a handful of washes.