[stone] Paper masks

[mike williams]

Dear Nicoletta

I work in sandstone country and carve it the whole time -
sandstone dust can be very toxic, i use a twin filter mask
when cutting or grinding using a pressure water sprayer
designed for garden use to spray a fine mist into the dusty
air and bring dust down - when carving a paper mask can be
used if replaced daily.

touch wood - so far clean lungs

mike



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