How to Read Laundry Care Labels and Symbols

A care label is a set of maximum safe limits, not a recipe. It tells you the hottest wash the garment will survive, whether bleach is permissible, and how much heat the fibre can take. It does not tell you how to remove a stain — and understanding that distinction prevents most laundry accidents.

The symbols follow a consistent logic once you know the five base shapes. Everything else is a modifier.

The Five Base Symbols

A washtub — washing
A triangle — bleaching
A square — drying
An iron — ironing
A circle — professional cleaning

Two rules then apply universally:

A cross through any symbol means do not do it at all.
Dots inside a symbol mean temperature: more dots, more heat. Lines beneath a symbol mean reduce mechanical action: one line for a mild cycle, two for a very gentle one.

Washing Symbols

The washtub may contain a number, which is the maximum temperature in Celsius — 30, 40, 60 or 95. It may instead contain dots: one dot for 30°C, two for 40°C, three for 60°C.

A hand in the tub means hand wash only, in cool water with minimal agitation.
A crossed-out tub means do not wash — usually because water will shrink, distort or mark the fabric. Common on structured wool, silk and rayon garments.
One line under the tub indicates a synthetics or permanent-press cycle. Two lines indicate a delicate or wool cycle.

Remember the number is a ceiling, not a recommendation. A 40°C label does not mean you should wash at 40°C. For protein stains such as blood, you must wash cold regardless of what the label permits.

Bleaching Symbols

An empty triangle — any bleach may be used, including chlorine
A triangle with two diagonal lines — oxygen (non-chlorine) bleach only
A crossed-out triangle — do not bleach at all

This symbol is where the most expensive mistakes happen. Even an empty triangle does not mean chlorine bleach is a good idea: it is the wrong tool for rust, makes yellow sweat marks worse, destroys elastane in spandex blends, and yellows nylon. See oxygen bleach vs chlorine bleach.

Drying Symbols

The square covers all drying.

A circle inside the square — tumble drying is permitted. One dot means low heat, two means medium, three means high.
A crossed-out circle in a square — do not tumble dry
A horizontal line inside the square — dry flat, essential for wool and knitwear
A vertical line — line dry, hung up
Three vertical lines — drip dry, without wringing
Diagonal lines in the top corner — dry in shade, away from direct sunlight

Regardless of what the label allows, never tumble dry an item that still has a stain on it. See why you shouldn't dry clothes until the stain is gone.

Ironing Symbols

The iron shape carries dots for temperature:

One dot — cool, up to about 110°C, for spandex, nylon and acetate
Two dots — medium, up to about 150°C, for polyester, wool and rayon
Three dots — hot, up to about 200°C, for cotton and linen
A crossed-out iron — do not iron
A crossed-out steam symbol beneath the iron — do not use steam

Professional Cleaning Symbols

A circle means professional care.

A circle containing "P" — dry clean with standard solvents
A circle containing "F" — dry clean with petroleum-based solvent only
A circle containing "W" — professional wet cleaning
A crossed-out circle — do not dry clean
A line or lines under the circle — reduced-severity process

Dry-clean-only is worth respecting. It usually reflects a real constraint: interfacing that distorts, dye that bleeds, or a fibre like rayon that loses strength when wet.

What the Label Does Not Tell You

This is the important part, and it is where labels are routinely misread.

It says nothing about stain chemistry. A label may permit a 60°C wash, but hot water will permanently set blood, vomit or a dairy stain. See cold water vs hot water.
It does not mention enzymes. Enzyme detergents are unsafe on wool and silk because those fibres are protein — but no symbol conveys this. See how enzyme cleaners work.
It does not confirm colourfastness. A garment can be machine-washable and still bleed dye. See preventing colour bleeding.
It does not cover solvents. Alcohol and acetone may be needed for ink or permanent marker, and neither appears on a label. Always spot-test — see safe spot-testing.

Reading the Fibre Content

The composition label is often more useful than the symbols for stain work, because fibre content determines chemistry:

Cellulose fibres — cotton, linen, viscose — tolerate enzymes, oxygen bleach and mild acids
Protein fibres — wool, silk — are damaged by enzymes, bleach and alkalis
Synthetics — polyester, nylon, acrylic — are heat-sensitive and hold oils
Elastane content of any percentage rules out chlorine bleach and high heat
Acetate and triacetate are dissolved by acetone

A blend takes the most restrictive limits of its components. A cotton-wool blend should be treated as wool.

Safety Reminder

Always follow the product label and garment care instructions. Never mix cleaning chemicals unless the product manufacturer specifically instructs you to do so. In particular, never mix chlorine bleach with ammonia, vinegar, other acids or rubbing alcohol — these combinations can release toxic gas.

Frequently Asked Questions

Does the number in the washtub mean I should wash at that temperature? No. It is the maximum the garment tolerates. Washing cooler is almost always safer, and for protein stains it is essential.

Can I ignore a dry-clean-only label? Sometimes people do successfully, but the risk is real: distortion, shrinkage and dye bleeding. On rayon, wool and structured garments, the label usually reflects a genuine constraint.

What if the label has been cut out? Identify the fibre by feel and behaviour, and default to the most cautious approach — cool water, gentle cycle, air dry, spot-test everything.

Why do two similar garments have different labels? Because of dye, finish, construction and trim. A print, a lining or a bonded coating can all lower the safe limits.

Does "do not bleach" include oxygen bleach? A crossed-out triangle means no bleach of any kind. A triangle with two diagonal lines means oxygen bleach only.

What does a line under the washtub actually change? It reduces mechanical action — a slower drum and gentler spin — which protects delicate weaves and stretch fabric from distortion.

Not Sure What the Stain Is?

The care label tells you what the fabric can survive; it cannot tell you what the stain needs. Not sure what caused the stain? Use StainWise to identify the stain from a photo and get a customized cleaning recommendation.

Identify My Stain