Why Sequestration Protects Fibre During Bleaching
Technical Insights — Britacel Silicones
You cannot see metal ions. You cannot smell them. You cannot detect them by looking at your water or your fabric. But in a hydrogen peroxide bleaching bath, they are working against you every single time — silently, rapidly, and destructively.
This is why sequestration is not a water treatment step. It is a fibre protection technology.
The Invisible Problem Inside Your Bleaching Bath
Iron, copper, manganese, calcium, and magnesium can enter your bleaching bath from multiple sources simultaneously: from the process water, from the cotton itself, from equipment corrosion, from previous chemical contamination. You do not need large quantities. Even trace levels are sufficient.
When these metal ions encounter hydrogen peroxide in an alkaline environment, they trigger a catalytic decomposition reaction — not in a controlled, uniform way, but in localised bursts wherever metal contamination is concentrated. The result: pin holes, tendering, localised strength loss, harsh surface feel, and uneven whiteness.
What a Good Sequestrant Actually Does
A sequestrant binds metal ions — forming stable complexes that render the metal chemically inert inside the bleaching bath. The iron is still present. The calcium is still present. But they can no longer interact with peroxide. The catalytic reaction cannot start. Peroxide decomposes at a controlled rate, evenly across the fabric. Fibre is protected. Whiteness develops uniformly. The bleaching bath is stable and reproducible batch after batch.
The Britacel Approach — EUROQUEST Range
EUROQUEST FEC — high-performance iron chelation and demineralisation. Especially valuable where water quality varies, iron contamination is elevated, or sensitive fabrics and continuous bleaching demand consistent protection.
EUROQUEST DIS — combines sequestration with strong dispersing action, binding heavy metal ions while keeping mineral impurities dispersed and away from the fibre surface. Cleaner bleaching bath, more uniform peroxide activity, better absorbency in the finished fabric.