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Cotton · Care Guide · The Swiss Laundry

Cotton clothes
care guide.

How to wash, dry, iron and store cotton garments in India. Temperature guide by garment type, shrinkage prevention, stain removal for Indian-specific stains, and advice for Kolkata’s climate year-round.

30–40°CStandard wash temperature
Damp ironBest ironing condition
60°CWhite cotton for hygiene
13 yrsEst. 2013 · Kolkata
Cotton care in brief

Cotton is the most forgiving fabric to care for — it handles machine washing, warm temperatures and direct ironing that would damage silk or wool. The main concerns are shrinkage in the first few washes, colour fading for darks, and yellowing for whites.

The Swiss Laundry · Kasba, Kolkata · Est. 2013
When cotton needs professional care: Plain cotton kurtas and shirts — launder at home. Structured cotton blazers and jackets — dry clean (the interlining, not the cotton, is the issue). Cotton-silk blends — dry clean. Heavily embroidered cotton — check embroidery type first.
01

Types of cotton — and what each needs

Cotton is the most common fabric in Indian wardrobes — from everyday kurtas and shirts to bed linen and towels. Understanding the type of cotton and construction determines the correct care.

Plain cotton (shirts, kurtas, salwar)Machine wash 30–40°C

The most care-friendly fabric category. Machine wash at 30–40°C, air dry, iron while slightly damp. No special handling required.

Cotton bed linen and towelsMachine wash 60°C

Bed linen benefits from higher temperature washing for hygiene. Cotton is stable enough to withstand 60°C washing. Tumble dry or line dry.

Dark cotton (navy, black, burgundy)Cold wash, inside out

Dark dyes bleed in warm water. Wash at 30°C, inside out, for the first 3–5 washes until the dye stabilises. Line dry in shade.

Embroidered cotton (kurta, dupatta)Cold hand wash or dry clean

The cotton base can be washed but embroidery threads — particularly silk or metallic — may not survive machine washing. Check the embroidery type first.

Structured cotton (blazer, formal jacket)Dry clean only

Canvas and interlining in structured cotton garments cannot withstand water. Dry clean to preserve the structure and shape.

Cotton-silk blendDry clean recommended

The silk component requires dry cleaning regardless of the cotton content. Dry clean the whole garment.

02

Washing cotton — temperature and method

Temperature guide:

30°C (cold): Lightly worn, low-soil cotton. Dark colours for the first few washes. Delicate cotton blouses. The safest temperature for maintaining colour and shape.

40°C (warm): Standard everyday cotton — shirts, kurtas, jeans, casual trousers. Most household cotton laundry. The sweet spot for effective cleaning without excessive shrinkage or colour loss.

60°C (hot): White cotton bed linen, towels, heavily soiled work garments. Kills bacteria and dust mites. Not suitable for dyed or printed cotton — colours will fade significantly.

Method: Normal agitation cycle for sturdy cotton. Gentle cycle for fine cotton, lightweight kurtas and delicate constructions. Separate whites from darks — even after many washes, dark cotton can bleed slightly onto white fabrics at warm temperatures.

Shrinkage prevention: Cotton shrinks most in the first 2–3 washes. After that, most quality cotton stabilises. To minimise shrinkage: wash at 30–40°C, avoid tumble drying at high heat, and remove from the machine immediately — wet cotton left sitting in a drum can set creases that resist ironing.
03

Drying cotton — avoiding shrinkage and creasing

Line drying: The correct method for most cotton. Hang shirts and kurtas on padded hangers. Line dry flat items (trousers, dupattas) draped over a line or on a drying rack. Dry in shade for dark and coloured cotton — UV exposure fades dyes significantly.

Tumble drying: Cotton can be tumble dried, but high heat causes shrinkage. Use medium or low heat. Remove while still slightly damp — this is the ideal moment for ironing cotton and produces the best results.

The damp ironing window: The most important drying tip for cotton: take it off the line or out of the dryer while still slightly damp (10–15% moisture). Cotton irons significantly better at this point than when fully dry. If it has dried completely, mist with clean water before ironing.

Drying cotton in Kolkata monsoon

Kolkata’s monsoon creates the most challenging drying conditions for cotton in India — high humidity, no direct sunlight, and indoor air circulation limited by closed windows during rain. Cotton dried slowly in high humidity develops mildew within hours. A ceiling fan at full speed over a drying rack significantly reduces drying time and prevents mildew. A dehumidifier in the drying room is the most effective solution during peak monsoon.

04

Ironing cotton — heat and technique

Cotton is one of the easier fabrics to iron well — it tolerates high heat, responds well to steam, and the fabric is robust enough to withstand ironing pressure. But the correct technique still matters.

Temperature: Medium-high to high heat — the cotton or linen setting on most irons. Cotton requires more heat than polyester or silk to release creases effectively.

Damp ironing: Iron while still slightly damp. Cotton irons at its best with residual moisture — the fibres relax more completely with heat and moisture combined than with heat alone.

Direction: Iron in long strokes along the grain of the garment — along the length of the shirt body, down the trouser leg. Short back-and-forth strokes create new small creases.

Coloured cotton: Iron dark and coloured cotton from the reverse side to prevent sheen marks. The reverse side pressing produces a cleaner finish without any risk of heat-induced colour change at the surface.

White cotton: Can be ironed from either side at maximum heat. Steam is essential for white cotton — it penetrates deeper into the fibre and produces a crisper result.

05

Stain removal from cotton — act promptly

Cotton is one of the more forgiving fabrics for stain treatment — it is robust enough to withstand targeted treatment that would damage silk or wool. The key is acting promptly before the stain sets.

Stain typeTreatment on plain cotton
Sweat / perspirationWash promptly at 40°C. For set sweat stains on white cotton: pre-treat with a paste of baking soda and water, leave 30 minutes, wash at 60°C.
Food / oil / gheeBlot excess. Apply a few drops of dish soap directly, work gently with a soft brush. Leave 15 minutes. Wash at 40°C.
Tea / coffee / chaiRinse in cold water immediately. Apply liquid detergent. Wash cold. Repeat if necessary.
Haldi / turmericDo not rub — it spreads. Rinse cold. Apply liquid detergent. Wash at 40°C. Haldi stains are sunlight-responsive — drying in direct sunlight significantly helps break down haldi pigment.
Ink / penApply rubbing alcohol (test on hidden area first). Blot. Rinse. Wash normally.
BloodCold water only — never hot. Hot water sets blood protein permanently. Rinse in cold water immediately. Mild soap. Cold wash.
Sindoor / kumkumAllow to dry completely, brush off loose powder. Apply liquid detergent. Wash at 40°C. Sindoor pigment is oil-based and responds well to detergent pre-treatment.
06

White cotton — keeping it white

White cotton yellows over time from two sources: accumulated sweat and body oil residue, and oxidation from light exposure and storage. Both are preventable.

Washing white cotton: Wash at 60°C when hygiene permits — higher temperatures are more effective at removing the protein residue from sweat that causes yellowing. Do not mix white cotton with slightly off-white or cream garments — the slight colour difference becomes visible after washing together.

White vinegar in the rinse: 250ml of white vinegar in the final rinse cycle removes mineral deposits from hard water (a significant cause of white cotton turning grey-white rather than bright white), acts as a natural fabric softener, and helps maintain the fibre pH.

Sunshine for white cotton: Unlike coloured fabrics, white cotton benefits from drying in direct sunlight — UV has a mild bleaching effect that helps maintain brightness. An hour of direct sun drying per wash significantly slows yellowing over time.

Storage: Never store white cotton without washing first. Sweat and body oil residue on stored white cotton oxidises into a permanent yellow in as little as one season of storage.

07

Storing cotton — simple but important

Cotton stores more easily than silk or wool — it tolerates a wider range of humidity and does not attract moths the way protein fibres do. The main concerns are cleanliness before storage and preventing deep fold marks.

Clean before storing: Sweat and food residue on stored cotton causes yellowing and attracts silverfish (which eat plant-based fibres including cotton). Always wash before putting away for the season.

Fold with tissue: Cotton develops permanent creases from folding under pressure during long storage. A sheet of tissue paper at each fold line distributes the pressure and reduces crease depth.

Kolkata monsoon: Cotton is more mould-resistant than silk or wool — but in Kolkata monsoon conditions (humidity above 85%), cotton stored in a damp room can develop mildew within days. Store in a well-ventilated location. Silica gel is not essential for cotton as it is for silk, but advisable in noticeably humid storage.

08

Cotton in India’s climate

Cotton is the definitive fabric for Indian conditions — breathable, absorbent, available in every price range, and wearable year-round across India's varied climate zones. This makes correct cotton care relevant to virtually everyone.

Summer: Cotton absorbs up to 20% of its weight in moisture before feeling wet — significantly more than polyester. It releases this moisture through evaporation, creating a cooling effect. Wash cotton more frequently in summer — heavy perspiration should be washed off within 24–48 hours to prevent yellowing.

Monsoon: The primary challenge is drying. Cotton dried slowly in high humidity develops mildew. Indoor drying with a fan, or a tumble dryer on medium heat, is the practical solution.

Winter: Cotton requires more ironing in the dry winter months — the lower humidity means cotton dries more completely and requires more moisture during ironing to press well. Keep a spray bottle of clean water near the ironing board during winter ironing.

09

Cotton care — do and do not

Do
  • Machine wash plain cotton at 30–40°C
  • Wash whites at 60°C for hygiene
  • Remove from machine immediately — never leave wet
  • Iron while still slightly damp
  • Use steam when ironing cotton
  • Dry dark cotton inside out in shade
  • Dry white cotton in direct sun to maintain brightness
  • Treat stains promptly before washing
  • Wash before storing for the season
Do not
  • Use hot water on blood stains — sets permanently
  • Leave wet cotton in the drum — sets deep creases
  • Wash dark cotton at high temperature
  • Iron completely dry cotton without dampening first
  • Tumble dry at high heat repeatedly
  • Bleach coloured cotton
  • Store without washing first
  • Mix white and off-white in the same wash

Common questions

Questions about
cotton care.

Machine wash at 30–40°C on a normal cycle. White cotton can go to 60°C for hygiene. Dark cotton — cold, inside out. Remove immediately after the cycle and hang or lay flat to dry.

Yes — 3–5% in the first few washes at higher temperatures. Wash at 30–40°C and avoid high-heat tumble drying to minimise shrinkage. After 2–3 cold washes, most cotton stabilises.

Iron while still slightly damp at medium-high heat with steam. Cotton irons significantly better with residual moisture. Iron dark cotton from the reverse side. Remove from the line while slightly damp rather than waiting for full drying.

Do not rub — it spreads. Rinse cold. Apply liquid detergent. Wash at 40°C. Dry in direct sunlight — UV helps break down haldi pigment significantly. Multiple wash cycles may be needed for a heavy haldi stain.

Wash at 60°C when possible. Add 250ml white vinegar to the final rinse cycle. Dry in direct sunlight. Never store without washing first — sweat residue on stored white cotton yellows permanently.

Cotton care
in Kolkata.

Professional laundry and dry cleaning for all cotton garments. Doorstep pickup across 30+ areas.

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