Whatman Filter Paper - Grade 91 Circles
 
These extremely strong filter papers have a high wet strength due to the addition of a small quantity of chemically stable resin. Normal qualitative applications will not introduce any significant impurities into the filtrate. The resins do, however, contain nitrogen so these grades should not be used in Kjeldahl estimations, etc. Some wet strengthened grades are available in folded (prepleated) forms.
 
Grade 91 (10 µm)
A general purpose creped filter for less critical routine analysis. Widely used to assay sucrose in cane sugar and within pharmaceutical laboratories for routine filtration.

 

Available In The Following Sizes
   
Diameter P/Box
   
110 mm 100
125 mm 100
150 mm 100
185 mm 100
240 mm 100

 

Due to the continuous development of our products, the goods supplied may vary in detail to that illustrated on our website.