Quote:
Originally Posted by PonceDeLeon
Black beauty is a processed coal slag used as an abrasive (shot blasting). Stuff creates a mess. Another really messy substance is carbon black - like the crap in your toner cartridge.
Any of you guys ever handled a product called Silica Fume ? It's a by-product from the extraction of aluminum, and is used in batching concrete to obtain different grades. Now that stuff can be highly temperamental !!