Somehow I got the idea years ago that I should tumble my brass in the garage instead of my workshop (or a living space). Is lead or any other harmful substance projected into the air by a vibratory case tumbler?
Safest to tumble brass in the garage, outside, or in a tool shed/out building. Lead styphnate in the primers is the issue. Also, adding a used clothes dryer sheet will cut down on some of the dust. Just put one into the tumbler or vibrator cleaner with your brass, the sheet traps some of the dust.
I'm a goner ! No wonder why I keep gaining weightI won't tumble at all for that reason. Warm water, Dawn, salt, and citric acid do a fine job and the lead doesn't go into the air.
I couldn't think of a more effective way to get lead into your body than inhaling it.
And it's not just the airborne dust. The dust settles on the floor or your tumbler, then you move the tumbler and get it on your hands...Or you sweep the floor 6 months later.
Lead pretty much accumulates in your body.