GRADE 4 V FLUTED Qualitative Filter Paper
Equivalent to Whatman grade 4 V, this very fast laboratory filter paper is used for coarse filtration when you need to separate a solid or precipitate from the filtrate.
Made from high alpha-cellulose cotton, this standard lab filter is not intended for ashing.
APPLICATIONS
science : Routine clean-up of insoluble liquids such as biological fluids or organic extracts in labs
food : Determination Sodium Chloride in foodstuffs
beverage : Filtration of musts in wine
metalurgy : Determination of silicon impurities in pig iron and steel
environment : Fast flowing air and exhausts monitoring when the collection of fine particles is not critical.
COARSE RETENTION
Retains coarse particles and gelatinous precipitates like:
Metal hydroxides (Al, Cr, Fe, Mg) , Be Oxide
Insoluble iron and ore, precipitated Silicates
Culture media, and colloidal sediments
paper : pure cotton cellulose
flow : fast
retention : 20~25 μm (coarse)
speed : 15~20 s (10ml DIN 53137)
size : ⌀ 240 mm
thickness : 140 μm
weight : 86 g/m²
ash : 0.1%
qty : 100 discsPRE-PLEATED
These Prepleated Fluted Filters saves filtration and folding time thanks to their increased surface area and loading capacity.
Provides faster flow than simple folding while maintaining similar grade characteristics.
Suitable for gravity filtration in standard funnels, not vacuum.
EQUIVALENCE & SIZE
See the cross-reference table and size diagrams in the photos to choose the appropriate reference and diameter of your circles.