Return-Path: Sender: (Marvin Kaye) To: lml@lancaironline.net Date: Sun, 29 Feb 2004 23:07:49 -0500 Message-ID: X-Original-Return-Path: Received: from imo-d21.mx.aol.com ([205.188.144.207] verified) by logan.com (CommuniGate Pro SMTP 4.1.8) with ESMTP id 3051650 for lml@lancaironline.net; Sun, 29 Feb 2004 21:49:53 -0500 Received: from Newlan2dl@aol.com by imo-d21.mx.aol.com (mail_out_v36_r4.14.) id q.1c0.15bc2daf (4446) for ; Sun, 29 Feb 2004 21:49:42 -0500 (EST) From: Newlan2dl@aol.com X-Original-Message-ID: <1c0.15bc2daf.2d73fec6@aol.com> X-Original-Date: Sun, 29 Feb 2004 21:49:42 EST Subject: Re: [LML] Re: Hysol 9339 Question X-Original-To: lml@lancaironline.net MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="-----------------------------1078109382" X-Mailer: 9.0 for Windows sub 5003 -------------------------------1078109382 Content-Type: text/plain; charset="US-ASCII" Content-Transfer-Encoding: 7bit Hi Barry Ordinarily you don't want to have anything other than a plain casting of resin, however what you have done is also potentially a good thing too. The reinforcing laminate does alter the hardness quite a bit. Many manufacturers will give a range of hardness with some layup in it but it isn't a "pure" test of the resin since void content, fiber type and fabric weave all play a part. Not to mention that the ball on the tip of the tester will get different readings if it comes down on the intersection of a pair of fiber vs. the interstices which would be mostly resin. The castings you have with laminate in it isn't particularly useful unless you made up some representative laminates to test. These could have some use, particularly if compared to resin castings. But the pure resin casting will give you the truest confirmation of adhesive properties. Dan Newland -------------------------------1078109382 Content-Type: text/html; charset="US-ASCII" Content-Transfer-Encoding: quoted-printable

Hi Barry

Ordinarily you don't want to have anything other than a plain casting o= f resin, however what you have done is also potentially a good thing to= o. The reinforcing laminate does alter the hardness quite a bit. = Many manufacturers will give a range of hardness with some layup in it but=20= it isn't a "pure" test of the resin since void content, fiber type and=20= fabric weave all play a part. Not to mention that the ball on the tip of the= tester will get different readings if it comes down on the intersection of=20= a pair of fiber vs. the interstices which would be mostly resin. The c= astings you have with laminate in it isn't particularly useful unless=20= you made up some representative laminates to test. These could have so= me use, particularly if compared to resin castings. But the pure resin= casting will give you the truest confirmation of adhesive properties.

Dan Newland

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