Hi Ron, NEMA G10 is glass fibre epoxy resin without flame retardant. NEMA FR4 is glass fibre epoxy resin with flame retardant. The NEMA spec (I think it's LI 1) gives the flame resistance. I don't have a copy of this - but FR4 meets the requirements of UL 94 V0 for flammability and I can fax you the relevant details on burning time etc if you want. Or try the UL web site www.ul.com. hope this helps Geoff Layhe www.lamar-uk.co.uk > ---------- > From: Dieselberg, Ron[SMTP:[log in to unmask]] > Reply To: TechNet E-Mail Forum.;Dieselberg, Ron > Sent: 11 April 2001 16:23 > To: [log in to unmask] > Subject: [TN] FR4 > > I am searching for flamibilityy info regarding G10 / FR-4 rigid PC board > material. I am specifically interested in the self-extinguishing > properties > of this material / or which material would would be best suited for this > type of application. Has anyone out there got this info, please. > Thanks. > > Ron Dieselberg > Trainer/Auditor > BAE SYSTEMS > Cincinnati Electronics Corp. > [log in to unmask] > > -------------------------------------------------------------------------- > ------- > 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 > -------------------------------------------------------------------------- > ------- > > > Private & Confidential: This e-mail message is confidential and is intended solely for the person or organisation to whom it is addressed. If the message is received by anyone other than the addressee please return the message to the sender by replying to it and then delete the message from your computer. --------------------------------------------------------------------------------- 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 ---------------------------------------------------------------------------------