First let talk about the dangers of ceramic shell investment.

[@louiefos5710]

Hi Eric, I only recently discovered you and your content has been extremely helpful. Thankyou. What are the dangers when removing the ceramic shell after the metal has been poured? Is fine silica still present?

[@LunarburnStudio]

I am glad you are finding my videos helpful. The two main dan are debris flying into your eyes so wear safety glasses and the silica dust so wear a properly fitting respirator.

[@dave_ecclectic]

To test for a fit on a respirator, done every time you put one on, you place your hands over the filters (difficult if they are on your back) and breathe in. There should be no leakage around the mask. It should suck into your face, and you can't pull air in. For those with beards you can go more expensive and get what are called powered air purifying respirator (PAPR). A motor blows air into the mask if there are any leaks it doesn't matter as they are positive leaks and not negative leaks. They are quite a bit more expensive. There is also their cousin which use supplied air, but the supplied air has to be clean and not use an oiled compressor. big no no. not reccomended.

[@roycarter8575]

Eric, yea for the shout out on safety first! Roy

[@roycarter8575]

Eric, yea for your shout-out on safety first! Roy

[@anitalim]

Is it good to have a ventilating option in a room where all the silica is contained? Like a window, or a vent of some kind?

[@LunarburnStudio]

Ideally yes, but even with good ventilation its best to wear a properly fitted respirator