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RE- Core forms




From: 	Robert Michaels[SMTP:robert.michaels-at-online.sme-dot-org]
Sent: 	Sunday, September 07, 1997 7:56 AM
To: 	tesla-at-pupman-dot-com
Subject: 	RE- Core forms

        Most plastics can be identified by means of the Michaels Test
        (on which subject I've posted before -- you mean you haven't
        all memorized it by now?).

        The Michaels Test (which I've named after myself - in full
        professional modesty, of course) is predicated on pyrolytic
        decomposition followed by organoleptic analysis.   In other
        words, you burn it and then sniff it.

        Cut a sliver of the test specimen.   Apply the flame of a
        match or cigarette lighter to it until fumes arise.  If the
        specimen ignites, withdraw the match or lighter and blow
        out the flame (on the specimen [and the match, too, for
        that matter] ).

        Now, sniff the smoke/fumes arising from the specimen.
        With sufficient experience the aroma of the fumes will enable
        immediate indentification.   Lacking such experience, make an
        A - B  comparison with a sliver of known material.

        The Michaels Test will not only indentify most polymers, but
        also woods, papers, fibers/textiles and most such complex
        polymeric substances.

        The Test is not fully useful in distinguishing close homologs,
        nor either can it discern molecular weights.  Thus polyethylene
        and polypropylene are difficult to distinguish.  Likewise,
        low-density polyethylene (LDPE) and high-density polyethylene
        (HDPE).


                                                Miffed, at the lack of
                                                professional recognition
                                                in -- Detroit, USA

                                                Robert Michaels




T>Is anyone familiar with this PVC looking pipe that is used in large
T>construction.   There is a lot of around in trash piles left over from
T>various jobs around town.  Some are 8" to 12" in diameter and up to 5'
T>or 6' in length.  The color is sort of turquoise if that helps.  Or
T>maybe someone knows a way to test it.

T>Thanks
T>Russ
T>Russ Thornton
T>CSR 2040,
T>Building 989, Rm.  A1-N20
T>Phone: (407) 494-6430
T>Email: thorntor-at-rs.pafb.af.mil