Is there dioxin in AeroPress paper micro-filters?Updated a year ago

No. The bleaching process used by filter paper manufacturers until the late 1980s used chlorine gas and the chlorine gas bleaching process created dioxin as a byproduct. In the late 1980s the filter paper mills switched to using what is called the non-elemental chlorine bleaching process (they use a chlorine compound, not chlorine gas) to eliminate producing dioxin as a byproduct.