Feature(may vary by option.)

●GRADES 1, 2, 4 : 11cm - Equivalent to Whatman Top 3 standard qualitative grades (110mm)
●GRADE 1 : MEDIUM RETENTION / MEDIUM FLOW - Retains medium crystalline particles (10~15 micron)
●GRADE 2 : HIGH RETENTION / SLOW FLOW - Retains fine crystalline particles (5~10 micron)
●GRADE 4 : COARSE RETENTION / FAST FLOW - Retains coarse and gelatinous precipitates (20~25 micron)
●BROAD APPLICATION RANGE : lab & chemistry, food & agriculture, brewing & wine, air & gas filtration

[11 cm (Bundle of 3)]

[15 cm (Bundle of 3)]

[18.5 cm (Bundle of 3)]

[7 cm (Bundle of 3)]

[9 cm (Bundle of 3)]

Description

GRADE 1, 2, 4 STANDARD Qualitative Filter Paper
Equivalent to Whatman grade 1, 2, 4, these laboratory filter paper are used for a broad range of filtration when you need to separate a solid or precipitate from the filtrate.
Made from high alpha-cellulose cotton, these standard lab filter are not intended for ashing.

APPLICATIONS
Depending on the grades, these filters have many applications, for example:

science : From clean-up of insoluble liquids to routine clarification of suspension
food : From solid foodstuffs separation and liquid extraction to fat content determination
beverage : From filtration of musts, pulps and syrups to malt analysis
agriculture : From soil pre-filtration to analysis
environment : From monitoring of fast flowing exhausts to smoke pollution
COARSE TO HIGH RETENTION
Retains fine, medium and coarse precipitates depending on grade used, for example:
- Grade 1 : Metal Sulfates (Pb, coarse form of Ba and Ca)
- Grade 2 : Metal Sulfides (Cd, Ni, Zn, Fe, Pb, Mn, Ag, As)
- Grade 4 : Metal hydroxides (Al, Cr, Fe, Mg) , Be Oxide
- - paper : pure cotton cellulose
  - flow : slow, medium, fast
  - retention : 5~10, 10~15, 20~25 μm (fine, medium, coarse)
  - speed : 15~20 s (10ml DIN 53137)
  - size : ⌀ 110 mm
  - thickness : 140-160 μm
  - weight : 86 g/m²
  - ash : 0.1%
  - qty : 300 discs
    PLAIN-DISCS
    These Flat Discs are suitable for gravity and Buchner low suction vacuum filtration.
    The same affordable filters are also available funnel-ready prefolded or prepleated.
    EQUIVALENCE & SIZE
    See the cross-reference table and size diagrams in the photos to choose the appropriate reference and diameter of your circles.