One is measuring heat absorption and the other mechanical movement? gary mccauley -----Original Message----- From: Gerard O'Brien [mailto:[log in to unmask]] Sent: Thursday, September 20, 2001 10:23 AM To: [log in to unmask] Subject: [TN] Tg measurements by DMA When testing Tg with DSC, the TM-650 test method calls out for the test to be run with the copper clad still attached and that if removed to expect an 8 to 15 degree reduction in values. For DMA it does not reference testing with copper clad or removed. Can anyone give me the reason why? Regards Gerard O'Brien ---------------------------------------------------------------------------- ----- Technet Mail List provided as a free service by IPC using LISTSERV 1.8d To unsubscribe, send a message to [log in to unmask] with following text in the BODY (NOT the subject field): SIGNOFF Technet To temporarily halt delivery of Technet send the following message: SET Technet NOMAIL Search previous postings at: www.ipc.org > On-Line Resources & Databases > E-mail Archives Please visit IPC web site (http://www.ipc.org/html/forum.htm) for additional information, or contact Keach Sasamori at [log in to unmask] or 847-509-9700 ext.5315 ---------------------------------------------------------------------------- ----- --------------------------------------------------------------------------------- Technet Mail List provided as a free service by IPC using LISTSERV 1.8d To unsubscribe, send a message to [log in to unmask] with following text in the BODY (NOT the subject field): SIGNOFF Technet To temporarily halt delivery of Technet send the following message: SET Technet NOMAIL Search previous postings at: www.ipc.org > On-Line Resources & Databases > E-mail Archives Please visit IPC web site (http://www.ipc.org/html/forum.htm) for additional information, or contact Keach Sasamori at [log in to unmask] or 847-509-9700 ext.5315 ---------------------------------------------------------------------------------