The envelope will catch 99.9(recurring)% of plaster and brick dust

Sadly not....

As part of our research for the Contamination Control DustBubble Kit we
had quite a bit of particle data generated from different methods of
drilling. The envelope method is remarkably ineffective. Even the CCDB kit
is less than 99.9% effective, but it is still reduces the particle emissions
to 100x lower than the allowed limit for asbestos.

Of course it might be that the envelope method is good enough and so be it.
Some folk still use matchsticks rather than spend a few pennies on an
anchor, and in the same way people will continue to use an envelope instead
of an inexpensive product that does a far better job.

Personally I'm particularly proud of the DustBubble because they are cheap,
take no time to use and work remarkably well. Starting this business has
been a nightmare, but every time I do some drilling at home and use them it
reminds me why I did...

Cheers,

Chris


www.dustbubble.com