Low ash paper hardened (max 0.02%), as an intermediate solution between quantatitive ash free paper (max 0.002%) and qualitative paper low ash (max 0.06%) for non critical quantative works. Its flow rate makes it recommendable for large precipitates, such as iron hydroxyde and other metal sulfates. High wet resistance. Surface weight 80 g/m², pore 12 - 16 ?m, thickness 250 ?m. Available in flat disks (packed in 100 disks bag foiled packaging, with no carton box), or folded (in a carton box). Equivalent to: Whatman 54