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

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Tony Thompson #150007 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 www.signaturepress.com (510) 540-6538; e-mail, tony@... Publishers of books on railroad history
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