Low ash paper (< 0.06%). Medium flow rate, suitable for a wide range of laboratory applications, frequently used in liquid clarification. It is used for rapid filtration of fine precipitates such as lead sulfate, hot calcium oxalate and calcium carbonate, as well as for routine techniques in the food and environmental industry. Weight 85 g / m², thickness 180 μm, filtration time 40 s, retention 10 – 13 μm, air flow 11 s / 100 ml / in², Herzberg 170 s / 100 ml, wet bursting strength > 30 kPa. Available in discs (presented in packages of 100 discs in a box). Equivalence: Whatman 1
Low ash paper (< 0.06%). Low flow rate, suitable for fine particle filtration. It is used in difficult filtration conditions, extra-fine precipitates, barium sulfate and copper oxide, as well as for the clarification of cloudy suspensions. Specified for wine clarification. Weight 85 g / m², thickness 170 μm, filtration time 300 s, retention 3 – 5 μm, air flow 93 s / 100 ml / in², Herzberg 2500 s / 100 ml, wet bursting strength > 30 kPa. Available in discs (presented in packages of 100 discs in box). Equivalence: Whatman 5
Crêpped surface, rough, for general laboratory use. Very high flow rate. Weight 70 g/m², thickness 250 μm, retention 25 μm, pressure difference 8 mm WG, ash content <0.1%. Available in discs (presented in packages of 100 discs in a box). Equivalence: Whatman 114
