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White Ribbon Filter' - ashless standard filter paper for medium fine precipitates (class 2b acc. to DIN 53 135) offering medium filtration speed. Applied in a variety of routine methods in quantitative analysis, e.g. determination of the sand content in foodstuffs to § 35 LMBG*, determination of the grade of flour or analysis of aqueous suspensions in the paper industry. Filtration speed: 70 herzberg. Ash content: 0.01%. Typical thickness: 180µm. Basis weight: 85g/m². Retention: 4-12µm. Diameter: 125mm. 100/Pack. Whatman #: 10300111.