Typical density of FR4, 50% resin ~1.9g/cm3, and Cu 8.96g/cm3 Why are you bothered about the Tg? The resin content is a more significant factor. Best Regards David Greig ______________________________ GigaDyne Ltd Buchan House Carnegie Campus Dunfermline KY11 8PL United Kingdom t: +44 (0)1383 624 975 www.gigadyne.co.uk <http://www.gigadyne.co.uk/> ______________________________ _____ From: icu-pcb-forum-bounce@xxxxxxxxxxxxx [mailto:icu-pcb-forum-bounce@xxxxxxxxxxxxx] On Behalf Of Kovacs, Laszlo Sent: 20 December 2005 01:34 To: icu-pcb-forum@xxxxxxxxxxxxx Subject: [PCB_FORUM] Re: TG 170 FR4 Anyone know what the weight of TG170 FR4 density per cubic inch is? Much appreciated. Laszlo Kovacs Network Appliance PCB Design Cad Tools (408)822-3167