Currently the most used neutralizing agents for potassium permanganate are hydroxylamine-based sulfate products and sodium metabisulfite.
Hydroxylamine was introduced in the garment finishing industry to replace metabisulfite, which causes severe irritations to the workers but, according to scientific evidence, hydroxylamine-based products are even more dangerous than metabisulfite.
Neutralization through avol lime is performed similarly to a standard process: comparable dosage to hydroxylamine, same treatment time and same liquor ratio.
Compared to hydroxylamine, it has the advantage of working at room temperature.
avol lime can replace metabisulfite in the neutralization process of avol oxy white, and the combination of the two products delivers a completely eco-sustainable local bleaching process.
avol lime and avol oxy white are compliant with ZDHC Gateway (level 1), and fulfill the requirements of the greenofchange® platform.