What does Machine Wash 70°C mean?

Detailed explanation

The wash 70 symbol indicates a maximum machine wash temperature of 70°C (158°F). This temperature is above the threshold for reliable disinfection (60°C) and below the near-boil 95°C maximum. It appears primarily on white or natural-coloured heavy cotton and linen items that require strong hygiene cleaning but are not being used in contexts that require sterilisation. At 70°C, biological detergents have lost most of their enzyme activity; cleaning performance relies on the thermal and chemical action of the detergent itself at high temperature.

How to follow the Machine Wash 70°C symbol:

1. 1

   Confirm every single item in the load is white cotton or white linen

   70°C will cause permanent damage to any coloured, synthetic, or protein-fibre garment

2. 2

   Select the 70°C setting and use the cotton or intensive programme; do not use a quick wash cycle

3. 3

   Use a detergent formulated for high-temperature washing

   standard biological detergents are mostly inactive above 60°C

4. 4

   Keep the load below half capacity

   heavy wet cotton at high temperature creates extreme mechanical loads on the drum

5. 5

   Allow the full cycle to complete without interruption

6. 6

   Remove promptly and dry as directed by the care label

   line drying in sunlight after a 70°C wash helps maintain whiteness

When does this symbol appear on care labels?

• For white cotton and linen items requiring strong sanitisation beyond what 60°C provides
• For heavily soiled white workwear, laboratory coats, or protective garments
• For items that have shown inadequate cleaning results at 60°C
• Never for coloured, synthetic, or delicate items

Common mistakes to avoid

• Washing any coloured or synthetic item at 70°C — damage is immediate and irreversible
• Using a quick or eco cycle at 70°C — these cycles often do not maintain the stated temperature for the full wash

Common Materials