I like the respirator. Small particles do go airborne and they aren't good for the lungs.
Harm might not be felt until years later.
Be safe, if wearing a respirator with the correct filter cartridges is what you want to do, go for. On a side note you need to have the correct cartridges for what you need to protect yourself from, if not it does no good and it is just gives you a false sense of security. The same goes for the material in the gloves one uses since many chemicals will easily passes through certain materials.
In reality thou you get much more silicon particles in your lungs from a day at the beach then you do in the process, of grinding a mirror by hand when the surfaces are kept wet. When you grind by hand and keep things wet it would be difficult to generating enough force to make particles go airborne.
The key is to really understand the the process and understand the true dangers and then have the proper personal protection if needed to correctly protect oneself.
Those that have developed lung problems from optical glass fabrication are from the fact that high speed machine grinding with a oil/water mixture is used and that creates a mist of silicon particles in the air. Bob Cox the former editor of Gleanings For ATMs column died from silicon related lung problem but has he stated in his story it was from the high speed grinding and oil/water mist created that he breathed for years that led to his health issues.
Edited by DAVIDG, 30 December 2019 - 04:54 PM.