5.2 Wet operations
In many cases the release of fibers can be reduced by technical measures in processing the materials, for instance, by using slow running saws, instead of the abrasive cutter typically used in the past.
A further reduction in the release of fibers during the processing of Asbestos containing materials is achieved through the use of so-called wet operations. The following techniques are representative:
1. The processing of wet mixtures on calenders and form presses in the manufacturing of Asbestos cement, gaskets, friction linings, grouting compounds and filters;
2. The cutting of wet materials, e.g for construction parts made of Asbestos cement;
3. Forming and other processing of Asbestos cement products while wet;
4. Interweaving of moist Asbestos yarn.
However, with all of these techniques it must be noted that after drying, the material remains on the processing tools tend to release more fibers, and therefore special safety measures are needed during cleaning.
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