Quantitative Grades - Whatman Filter Paper

WET STRENGTH

L – Suitable for gravity or low suction filtration. Care must be taken to prevent rupture of paper

M – Will withstand all normal use on Buchner Funnels or others devices under suction or moderate pressure

H – High wet strength and high chemical resistance

Grade No	CLICK HERE FOR PRICING	Flow rate	Retention microns	Wet Strength	Thickness, mm	Ash %
Ashless 40	General purpose gravimetric paper	Medium	8	L	0.20	0.01

Grade No	CLICK HERE FOR PRICING	Flow rate	Retention microns	Wet Strength	Thickness, mm	Ash %
Ashless 41	For filtration of coarse and gelatinous precipitates	fast	20-25	L	0.21	0.01

Grade No	CLICK HERE FOR PRICING	Flow rate	Retention microns	Wet Strength	Thickness, mm	Ash %
Ashless 42	Highly retentive for fine precipitates	Slow	2.5	L	0.20	0.01

Grade No	CLICK HERE FOR PRICING	Flow rate	Retention microns	Wet Strength	Thickness, mm	Ash %
Ashless 43	Intermediate retention and flow rate between Nos 40 and 41	Medium/Fast	16	L	0.21	0.01

Grade No	CLICK HERE FOR PRICING	Flow rate	Retention microns	Wet Strength	Thickness, mm	Ash %
Ashless 44	Thin version of No. 42	Slow	3	L	0.17	0.01

Grade No	CLICK HERE FOR PRICING	Flow rate	Retention microns	Wet Strength	Thickness, mm	Ash %
Hardened 50	For retention of finest crystalline precipitates. Highly glazed surface	Slow	2.7	H	0.12	0.025

Grade No	CLICK HERE FOR PRICING	Flow rate	Retention microns	Wet Strength	Thickness, mm	Ash %
Hardened 52	General purpose hardened grade	Medium	7	H	0.17	0.025

Grade No	CLICK HERE FOR PRICING	Flow rate	Retention microns	Wet Strength	Thickness, mm	Ash %
Hardened 54	For filtration of coarse and gelatinous precipitates	Fast	20-25	H	0.18	0.025