I spoke with a major supplier of berylliun copper years ago at a trade show. They told me that the major health problem is the intake of copper, not so much beryllium. I always use a good respirator, not the worthless paper paint masks. Those do not form a seal against the face and allow plenty of contaminants into the lungs. Spend an extra $20 and invest in a healthy future rather than save $18 and experience lung problems.
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