These wet strengthened hard smooth filter papers are made of refined pulp and linters and have a low ash content. They are often used for quantitative routine procedures and for analytical gravimetric applications.
- High wet-strength
- Very low ash content
- For strongly acidic and basic media
- Suitable for gravimetric, quantitative analysis
- Fiber-free filtration
Due to their high mechanical strength in wet condition they are particularly suited for applications, where the residue is removed from the filter with a spatula or a jet of water. They feature a high wet strength and can also be used in the filtration of strongly alkaline or strongly acidic solutions.
Grade MN 1640 we is the fastest quantitative hardened filter paper with highest flow rate. It is used for example in analytical procedures of samples with coarse or gelatinous particles.
Grade MN 1640 w is a fast, ashless hardened filter paper. Recommended for analytical procedures involving coarse particles or gelatinous precipitates.
Grade MN 1640 m is a general purpose, ashless hardened filter paper with medium speed and medium retention. Typical applications include gravimetric analysis for components, quantitative determinations of sediments and high purity clean up procedures.
Grade MN 1640 md is an ashless hardened filter paper, which is slightly more retentive than MN 1640 m with corresponding increase in filtration time.
Grade MN 1640 d is an ashless, slow filter paper with very fine particle retention. Standard hardened paper for critical gravimetric analysis of fine precipitates like barium sulfate or metastannic acid.
Grade MN 1640 de is an ashless, very slow hardened filter paper for the filtration of extremely fine particles in quantitative range.