A recent increase in wedge voiding has prompted an investigation into the possible causes of this defect. If anyone is experiencing this defect, (wedge voiding and/or "pink ring") OR you DO NOT have a problem with it , I would appreciate any information that you could supply pertaining to the following: -Hole size defect found in and aspect ratio -Drill supplier -Core material supplier -Prepreg supplier -Oxide parameters and chemistry Thank you in advance for your help. *************************************************************************** * 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. * ***************************************************************************