It doesn't work that way. The PCB square area receives the pressure direct. (Like pounds per square inch) You can put close to the same panel sizes in the press. (Like 14 X 18 in one opening and 16 X 18 in another) Check with your laminate supplier. They should have a recommended pressure range for lamination. Work within that range to achieve the pressures. Like 18 X 24 at 200 PSI and 16 X 18 at 300 PSI in the same press. An important note to mention is that if you do controlled impedance work, your dielectric thickness' will be all over the place. (variance) Also, you will see dimensional stability differences. (growth or shrinkage) Be sure you look downstream at any potential changes you may create. Groovy ______________________________ Reply Separator _________________________________ Subject: FAB: Lamination Author: [log in to unmask] at SMTPLINK-HADCO Date: 9/16/96 8:08 AM Does any PCB manufacturer has an experiance with lamination proccess of mixing different board sizes into different openings of the press in the same cycle (using same size of press plates and seperators)? Shabtay Shalev Engineering *************************************************************************** * TechNet mail list is provided as a service by IPC using SmartList v3.05 * *************************************************************************** * To unsubscribe from this list at any time, send a message to: * * [log in to unmask] with <subject: unsubscribe> and no text. * *************************************************************************** *************************************************************************** * TechNet mail list is provided as a service by IPC using SmartList v3.05 * *************************************************************************** * To unsubscribe from this list at any time, send a message to: * * [log in to unmask] with <subject: unsubscribe> and no text. * ***************************************************************************