Lab Filtration glossary
Hardened
Process of treating a cellulose paper to increase its strength.
FAQ Hardened paper is the process of treating a cellulose paper to increase its strength. There are three methods manufacturers can use to increase wet strength:- Increasing paper thickness: Improves strength, but very thick paper is highly absorbent and can be difficult to wash.
- Treating with mineral acid: Removes trace metals (improving purity), producing a tough paper with a hard surface.
- Adding a stable synthetic resin: Suited for non-critical applications as the resin can affect critical analyses.
Hardened filter papers produce high wet strength and chemical resistance.
The tough surface makes these filters suitable for a wide range of critical filtration procedures.
These filters are particularly suitable for Buchner filtration where the tough, smooth surface of the filter makes it easy to recover precipitates.
Hardened paper is the process of treating a cellulose paper to increase its strength.
There are three methods manufacturers can use to increase wet strength:
- Increasing paper thickness: Improves strength, but very thick paper is highly absorbent and can be difficult to wash.
- Treating with mineral acid: Removes trace metals (improving purity), producing a tough paper with a hard surface.
- Adding a stable synthetic resin: Suited for non-critical applications as the resin can affect critical analyses.
Hardened filter papers produce high wet strength and chemical resistance.
The tough surface makes these filters suitable for a wide range of critical filtration procedures.
These filters are particularly suitable for Buchner filtration where the tough, smooth surface of the filter makes it easy to recover precipitates.
The tough surface makes these filters suitable for a wide range of critical filtration procedures.
These filters are particularly suitable for Buchner filtration where the tough, smooth surface of the filter makes it easy to recover precipitates.