BRANCHIA ashless quantitative filter paper, very low flow rate

Ashless paper (< 0.007%) made of cotton fibers. Very low flow rate, adequate for fine particles retention. Suitable for precipitate filtration of cold barium sulphate, lead sulphate, zinc and nickel sulphides, etc. Weight 100 g / m², thickness 160 μm, filtration time 300 s, retention 2 - 3 μm, wet bursting strength > 20 kPa. Available in discs (presented in packages of 100 discs in box). Equivalence: Whatman 42