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CHECK THE TAG / THE GARMENT CARE FIELD GUIDEEDITION 05 · REFERENCE SNAPSHOT 2026-11-01
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CARE MARK / BLEACHING / ISO 3758:2023

Do not bleach symbol.

Do not use bleach, including oxygen-based bleach.

EXPLICIT INSTRUCTIONSOURCE-TRACEDINTERNATIONAL REFERENCE
Use this mark in the decoder
ILLUSTRATIVE CARE MARKINDEX / DO-NOT-BLEACH
Do not bleach symbol: Do not use bleach, including oxygen-based bleach.
THE MARK IS NOT A TEST RESULTCTT / 05
THE SHORT ANSWER

What does it mean?

Do not use bleach, including oxygen-based bleach.

01 / HOW TO IDENTIFY IT

Match the shape, not just the words.

Look for a triangle. An empty triangle, two diagonal strokes inside it, or a large cross over it have different meanings.

A crossed triangle prohibits bleaching, including oxygen-based bleach. This rule is easy to overlook when a detergent contains whitening or bleaching additives.

02 / WHAT TO DO

The practical decision.

Choose a bleach-free detergent and treat stains according to the full garment label. Avoid assuming that oxygen bleach is safe merely because it seems milder than chlorine bleach.

Do not skip this detail

Bleaching may damage the colour, fibres or finish; choose a bleach-free detergent.

03 / WHAT PEOPLE CONFUSE

One small detail changes the meaning.

Compare this with the lined triangle, which allows non-chlorine bleaching, and the empty triangle, which allows any bleaching agent.

04 / AFTER YOU IDENTIFY IT

Check the rest of the tag.

The washing, bleaching, drying, ironing and professional-care instructions work together. This page interprets one symbol only; a blank or unreadable mark does not grant permission for any other treatment.

Never replace the maker’s written instructions with a guess based only on material composition or appearance. Read the complete care-label method.

REFERENCE CHECK / 01 NOV 2026

The source behind this interpretation

Care marks describe permitted treatments for the finished article, not a guarantee of results. Some standards require purchase and the illustrations here are independent teaching representations. Read the evidence and licensing limits.