L – Suitable for gravity or low suction filtration. Care must be taken to prevent rupture of paper
M – Will withstand all normal use on Buchner Funnels or others devices under suction or moderate pressure
H – High wet strength and high chemical resistance
Grade No
Flow rate
Retention microns
Wet Strength
Thickness, mm
Ash %
1
The most widely used general purpose paper
medium/fast
11
L
0.18
0.06
Available Sizes:
Circles: 10 mm to 150 cm (available prepleated)
Sheets: 26 x 31 mm to 600 x 600 mm
Properties
Particle retention1: 11µm
Nominal thickness: 180 µm
Nominal basis weight: 87 g/m2
Nominal ash content2: 0.06%
Applications
Grade 1 is the most widely used filter paper in routine applications requiring medium retention
and flow rate, and is most frequently used for clarifying liquids. Specific applications include:
Qualitative analytical separation for lead sulfate, calcium oxalate, and calcium carbonate
Soil analysis and seed testing
Separating foodstuffs from associated liquid or extracting liquid
Collecting atmospheric dust for photometric measurement
Gas detection through the addition of a chromogenic reagent
