Filtry jakościowe Grade 91
Filtr marszczony ogólnego przeznaczenia dla mniej wymagających analiz rutynowch. Szeroko stosowany do oznaczania zawartości sacharozy w cukrze trzcinowym oraz w laboratoriach farmaceutycznych do rutynowej filtracji.
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.

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.
Filtry jakościowe Grade 91
Filtry jakościowe Grade 91
Filtry jakościowe Grade 91
Grade Grade 91 
Grade Type Wet Strengthened 
Diameter 190 mm
Typical Particle Retention in Liquid 10 µm 
Nominal Thickness 205 µm
Typical water flow rate 274 ml/min 
Nominal Basis Weight 65 g/m2
Nominal Air Flow Rate 6 s/100 ml/in2 
Material Cellulose 
Properties Creped 
Application Widely used to assay sucrose in cane sugar and within pharmaceutical laboratories for routine filtration. 
Product Product Name Dimensions
1091-110 Grade 91 Qualitative Filter Paper Wet-Strengthened; circle; 110 mm (subdivided into 100) 110 mm
1091-125 Grade 91 Qualitative Filter Paper Wet-Strengthened; circle; 125 mm (subdivided into 100) 125 mm
1091-150 Grade 91 Qualitative Filter Paper Wet-Strengthened; circle; 150 mm (subdivided into 100) 150 mm
1091-165 Grade 91 Qualitative Filter Paper Wet-Strengthened; circle; 165 mm (subdivided into 100) 165 mm
1091-185 Grade 91 Qualitative Filter Paper Wet-Strengthened; circle; 185 mm (subdivided into 100) 185 mm
1091-190 Grade 91 Qualitative Filter Paper Wet-Strengthened; circle; 190 mm (subdivided into 100) 190 mm
1091-240 Grade 91 Qualitative Filter Paper Wet-Strengthened; circle; 240 mm (subdivided into 100) 240 mm
1091-930 Grade 91 Qualitative Filter Paper Wet-Strengthened; sheet; 58 x 58 cm 58 x 58 cm
1091-935 Grade 91 Qualitative Filter Paper Wet-Strengthened; sheet; 61 x 61 cm 61 x 61 cm
1091-330 Grade 91 Qualitative Filter Paper Wet-Strengthened, circle, 330mm (subdivided into 100) 330 mm
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