With less than 0,01% ash, Cytiva's Whatman Grade 589/1 filter papers can be used for the Blaine test in the cement industry and as an ash content test filter for foodstuffs.

• Herzberg filtration speed of 50 seconds*
• Black ribbon filter for fast filtration of coarse precipitates
• High purity (<0,01% ash)
• Blaine test and ash content test compatible
• Also available prepleated as Grade 589/1½

*The time taken to filter 100 mp water (20° C) through a filter area of 10 cm² at a constant pressure of 5 cm water column.

Whatman Grade 589/1 filter papers from Cytiva's business are designed for fast filtration of coarse precipitates in support of tests such as cement fineness measurement in a standard Blaine test or determination of the ash content in foodstuffs.