1. expected from their low silica content and Conclusion
2. the relatively high calcium content. In in Different types of MMVF fibers can
3. vivo studies it has been observed that the have very different in vitro dissolution
4. long fibers of the experimental HT-fiber rates at pH 4.5 to 4.8 and pH 7.7 as
5. are "broken" in the Iungs of the rats (5). shown for commercial glasswool