Re: S330 or S280 shot blasting media (Liquid Gravity)

Tony Thompson

Part of an on-line review stated, "I am not sure what metal is used for the tiny little "BBs", but it is not magnetic and after a few measurements I came up with a density of about 4.15 gr/cm3 (lead has a density of 11.3 gr/cm3 for comparison)."

      Something is amiss here. Steel's density is 8.05 g/cm3. Even if the person "measuring" the density included the air, they should have gotten about 2/3 of the full density, or more than 5 g/cm3. A number like 4.15 is closer to titanium, and I seriously doubt the little balls are titanium.

Tony Thompson             Editor, Signature Press, Berkeley, CA
2906 Forest Ave., Berkeley, CA 94705
(510) 540-6538; e-mail, tony@...
Publishers of books on railroad history

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