Quote:

coal slag
USER CAUTION!: Normal usage of BLACK MAGICŪ as an abrasive blasting media may cause mechanical breakdown of the product with the potential of producing significant amounts of respirable(< 10 micron) dusts. In addition, the potential for exceeding the TLV and Permissible Exposure Limit (PEL) of a toxic material must be evaluated depending on the nature of the surface treated. For example, using BLACK MAGICŪ for abrasive blasting of a surface covered with lead based paint can pose a risk for exceeding the TLV or PEL for lead.
Iron Oxide: 1-60% Sulfur Trioxide: 0-15%
Amorphous Silica: 1-55% Phosphorus Pentoxide: 0-1%
Crystalline Silica: < 1% Aluminum Oxide: 15-40%
Titanium Dioxide: 0-5% Calcium Oxide: 0-30%
Magnesium Oxide: 0-6% Sodium Oxide: 0-2


Breathing dust containing silica will cause silicosis, a fatal lung disease.
Breathing dust during blasting operations will cause asbestosis, lead poisoning
and/or other serious or fatal diseases. A NIOSH-approved, well-maintained, supplied-air abrasive
blasting respirator must be used by anyone blasting, anyone handling or using the abrasive and
anyone in the area of the dust. Harmful dust containing toxic material from abrasives or surfaces
being blasted can remain suspended in the air for long periods of time after blasting has ceased.
Failure to avoid the above danger will result in death or serious injury.

safer than sand but still need to be careful. ever see any old coal miners?

crushed glass works really well and is cheap. i would use glass over black magic




OMG I should be dead by now!

Glass beads are way more $$ and are just as nasty to breath.

I've done a little blasting over the years, alot actually.