"Josepi" wrote in message
...
We were demonstrated to, in a workplace safety meeting, the use of the
better quality paper particulate filters. Ones with the heavy duty double
elastics and proper nose pinch metal with various gaskets out the
perimeters.

Nobody could make them work, period! They leak like crazy around the
edges.
It was quite amusing to see the wearer, approached with the smouldering
test
stick, and watch the response as the wearer jumped back gagging and
coughing
as soon as the tester even got close.

The only ones that were effective were two types with the double filters
on
the sides. People with moustaches had a hard time getting a seal, at any
rate. Some had claustrophobia attacks when wearing them...LOL

I was taught basic lung safety in basic training. Tear gas and smoke. With
masks and without for at least a minute. Then there were the colored smoke
grenades dropped down the concrete pipe - blew blue, yellow and red snot for
days.