First I appreciate the information I received from my previous post. I need some help for solder finish of PCB. Why do they look dull and hazel sometime ( not uniform and shinny). Manufacture checks the solder pot and everything ,including copper content, is within range. What I see there is quite heavy flux floating on the top of the solder and solder flow is quite slow ( flux is OA type). What will be the best way for Manufacture controlling the solderability without damaging boards. Now only visual check and wait for complaining. *************************************************************************** * 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] * ***************************************************************************