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FAS bleaching (FAS)

FAS bleaching (FAS) Formamidine sulphinic acid (FAS) is a low-odour crystalline reducing agent used in the bleaching of wood-containing pulp since the 1980s. A patent granted in 1983 1 proposes bleaching of mechanical pulp and recycled fibre pulp in a single-stage and two-stage process using FAS together with other bleaching chemicals. Since then, FAS has
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This page has been updated 15.11.2021