Ben; In addition to the good answers already given, you may also wish to look in the IPC-A-600 and 610. Both these documents illustrate conditions of the soldermask, and it's acceptability requirements. Regards, Gary Ferrari IPC Staff *************************************************************************** * 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] * ***************************************************************************