What does Any Bleach Allowed mean?

Detailed explanation

The any bleach allowed symbol (an empty triangle) is defined in ISO 3758 and is among the most permissive care symbols — both chlorine bleach (sodium hypochlorite) and oxygen bleach (sodium percarbonate) are safe to use. The triangle was chosen as the international bleach symbol for its resemblance to the chemical hazard triangle, suggesting caution even when bleaching is permitted. This symbol appears almost exclusively on robust white cotton and white linen, which are the only common textile types that can withstand the powerful oxidising action of chlorine bleach without colour damage or fibre destruction.

How to follow the Any Bleach Allowed symbol:

1. 1

   Verify the item is white cotton or white linen

   check the fabric composition label; this symbol should only appear on these fabrics but always confirm before bleaching

2. 2

   Choose your bleach type

   chlorine bleach (e.g. Domestos, Clorox) for maximum whitening; oxygen bleach (e.g. OxiClean, Vanish Oxi Action) for gentler whitening with less fibre wear over time

3. 3

   Always dilute bleach before use

   never pour concentrated bleach directly onto fabric; follow the product's dilution instructions (typically 1 part chlorine bleach to 10–30 parts water)

4. 4

   For machine washing: add diluted bleach to the bleach dispenser drawer, or pour it into the drum water before adding the garment

   not onto the garment directly

5. 5

   For pre-soaking stained items

   dissolve the bleach in water in a basin first, then submerge the garment for the time stated on the product

6. 6

   Run an extra rinse cycle after bleaching

   chlorine residue weakens cotton fibres with repeated exposure; remove it thoroughly

7. 7

   Check for any elastic, Lycra, or spandex content before using chlorine bleach

   even in a white item, chlorine destroys elastic fibres immediately

8. 8

   Dry in sunlight where possible

   UV exposure naturally enhances the whitening effect after bleaching

When does this symbol appear on care labels?

• For white cotton sheets, pillowcases, and duvet covers to restore and maintain whiteness
• For white cotton towels that have become grey or yellowed through repeated use
• For white cotton shirts and T-shirts with stubborn stains such as grass, wine, or food
• For sanitising white dishcloths and kitchen towels that require genuine disinfection
• Only when the care label explicitly shows the empty triangle — never on any coloured, synthetic, or protein-fibre item

Common mistakes to avoid

• Using bleach on any coloured item — even items with white body but coloured trim or stitching will be partially damaged
• Pouring undiluted bleach directly onto the garment — causes yellow staining and localised fibre damage
• Mixing bleach with other cleaning products in the machine drawer — dangerous chemical reactions can produce toxic chlorine gas
• Assuming more bleach produces whiter results — excessive bleach accelerates fibre breakdown dramatically; follow dosing guidelines
• Bleaching items with elastic waistbands or cuffs — chlorine destroys the elastic almost immediately

Common Materials