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Qualitative Filter Papers Chemistry Lab

Hawach Scientific Co., Ltd qualitative filter paper chemistry lab is divided into standard grade and wet strength grade. The wet strength grade adds a small amount of chemical stabilizer to the standard grade. Wet strengthened grades are with better moisture resistance. The ash content of filter paper 1 is less than 0.1%. Qualitative filter papers cover a wide range of laboratory applications and frequently used for clarifying liquids. Wet strength filter paper disc exhibits excellent compression resistance under high pressure and vacuum laboratory conditions and is not easily damaged.

Technical Data of Qualitative Filter Papers

GradeParticle RetentionProduct AppearanceFiltration SpeedAsh Content (%)Basis Weight (g/m2)Wet Burst (mm H2O)
BIO-111μmSmoothMedium<0.184>140
BIO-28μmSmoothMedium<0.184>140
BIO-420μmSmoothFast<0.184>120
BIO-52.5μmSmoothSlow<0.184>180
BIO-63.0μmSmoothSlow<0.184>180
GradeSeparating PropertyFiltration SecondsFiltration SpeedAsh Content (%)Pore SizeBasis Weight (g/m2)Wet Burst (mm H2O)
BIO-91PbSO4>35–<70Medium<0.1310μm84>=320
BIO-113Fe(OH)3<35sFast<0.1330μm68>=320
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