Hardened ashless filters (aprox. 0.002%), especially recommended for vacuum and pressure filtration, and for the use of acidic and alkaline solutions.

• Made of super-refined cotton linters and cellulose; acid washed
• α-cellulose content above 95%
• High wet strength; easy to scrap off or wash off precipitates
• High resistance to aggressive chemical components, like sulfuric and nitric acids (up to 40% at 50° Celcius) and alkalis (up to 10% at 20° Celcius)
• For analytical applications, routine quantitative and /or gravimetric procedures

1) Measured with 150 mm water column instead of 50 mm
2) Approximate values

Other sizes on request.