Bleaching symbols

An empty-triangle symbol is the broadest permission. It allows any bleach when needed, including chlorine or non-chlorine bleach. Two diagonal lines inside the triangle narrow that permission. The non-chlorine bleach symbol permits only the non-chlorine category, often described on products as oxygen or color-safe bleach. The lines are a restriction, not decoration.

A do-not-bleach symbol has a large cross over the triangle and closes the category completely. It forbids both chlorine and non-chlorine bleach. Do not treat the cross as a stronger version of the two diagonal lines. The lined triangle leaves one bleach category available, while the crossed triangle leaves none. Check the whole outline when the print is faint.

Read these as three distinct states: empty means any bleach is permitted when needed, diagonal lines mean non-chlorine bleach only, and a cross means no bleach. There are no temperature dots or cycle bars to combine in this family.

The words 'when needed' matter. An empty triangle says the garment's care instruction permits bleach. It does not tell you to add bleach to every load. The triangle also does not set an amount, concentration, soak time, or dispenser setting. Those details come from the bleach product's own directions, within the category the care label allows.

The same limit applies to the lined triangle. It identifies the allowed bleach class but does not approve every possible product use. First confirm that the product is non-chlorine. Then follow its directions. If the triangle is crossed, stop at the care label's prohibition and do not substitute an oxygen or color-safe product on the theory that it is gentler.

Bleaching is independent of the wash temperature. A triangle does not raise or lower the number or dots in the washtub. Follow both families: the tub for the permitted wash method and maximum temperature, and the triangle for bleach permission.

Trace the outer triangle first. Then look inside it rather than counting every stroke on the tag. The non-chlorine mark has two short parallel diagonal lines contained by the triangle. The prohibition mark uses two crossing strokes laid across the whole symbol. Parallel lines and a cross can blur together in a tiny print, so check whether the strokes meet each other.

Do not confuse the triangle's own sloping sides with the two inner lines. An empty triangle still has three outer edges and no added mark. On the lined version, the extra strokes sit together inside one side of the outline. On the crossed version, the added strokes travel in opposite directions and intersect over the triangle.

If part of the symbol is hidden by a fold, use its second-place position as supporting evidence, not as a substitute for the mark. The drying square comes next and can look angular too. A triangle has three outer sides; the drying family has a four-sided square.

ISO 3758 and ASTM D5489 use the same core three-way distinction here: empty triangle for any bleach, two diagonal lines for non-chlorine bleach only, and crossed triangle for no bleach. You do not need a regional dot-to-number conversion as you do for washing. The outer shape and the inner marks carry the same basic reading in both systems.

Regional labels can still look different because of wording, spacing, or which instructions are printed together. Identify the triangle itself before relying on nearby words. The US and international comparison covers the larger differences across the full label and shows why the washing and tumble-drying families need more regional attention than bleaching.