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Calif

Anyone know what this stuff is made of??

2/22/2004 2:38:25 PM

Ctpumpkin@optonline.net

Perlite is not a trade name but a generic term for naturally occurring silicous rock. The distinguishing feature which sets perlite apart from other volcanic glasses is that when heated to a suitable point in its softening range, it expands from four to twenty times its original volume.

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http://www.perlite.org/

2/22/2004 3:00:33 PM