Pink ring by itself is cosmetic - and is an indication of a less than perfect process. The caution is if you have pink ring YOU COULD HAVE WEDGE VOIDS. and this is where the functional problems come up. When I see obvious pink ring, then multiple microsections should be performed to assure no wedge voids are present. If they are not and the hole wall plating is continuous, then the boards are not a realiability threat (for that reason). Susan Mansilla Robisan Lab *************************************************************************** * TechNet mail list is provided as a service by IPC using SmartList v3.05 * *************************************************************************** * To subscribe/unsubscribe send a message <to: [log in to unmask]> * * with <subject: subscribe/unsubscribe> and no text in the body. * *************************************************************************** * If you are having a problem with the IPC TechNet forum please contact * * Dmitriy Sklyar at 847-509-9700 ext. 311 or email at [log in to unmask] * ***************************************************************************