What does the 72% marking on this laundry soap mean? — Laundry soap 72% 200g

The 72% marking on this bar refers to its fatty-acid content — the part of the soap that actually lifts dirt. Soap molecules have one end that attracts water and another that attracts oil, so they can surround oily grime and help rinse it away from fabric. A bar marked 72% has a high proportion of these washing-active fatty acids, which is why a little direct rubbing can be enough for localized dirt.

This high fatty-acid content also helps the bar lather reliably in hard water, where some other soaps produce poor foam. The added soap components in the formulation help soften water, which makes the foam spread more evenly through textile fibres and helps the soap wash out more completely after rinsing. In practice, this means less residue is left in hand-washed socks, tea towels, and children's outdoor wear.

Remember that 72% is a fatty-acid marking, not a purity rating or a specific ingredient content beyond that. The composition is described as based on natural raw materials, but for household use the key point is that it is a simple laundry bar, not a body soap or a delicate cleanser.