Particles of this sort can possibly cause rough plating in the form of nodules at any part of the plated board. I would certainly want to get them out of my system. As they are organic in nature they may also be attacked by the high acid levels in the bath and cause organic contamination. Simple filtration should remove them but make sure your filters are of a micron size small enough to capture them. Change your filters often and by all means make sure you eliminate the source of contamination. *************************************************************************** * 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. * *************************************************************************** * 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] * ***************************************************************************