Inert anode in acid copper plating refers to an insoluble anode. Usuaully made of a titanium alloy. If an inert anode is used for plating, copper replenishment is necessary as plating proceeds. This may be acheived thru desolution of copper or coppr oxide external to the plating cell. These types of anodes are common in horizontal conveyorized plating equipment. Hope this helps. George MIlad Shipley Ronal Inc ############################################################## TechNet Mail List provided as a free service by IPC using LISTSERV 1.8c ############################################################## To subscribe/unsubscribe, send a message to [log in to unmask] with following text in the body: To subscribe: SUBSCRIBE TECHNET <your full name> To unsubscribe: SIGNOFF TECHNET ############################################################## Please visit IPC web site (http://www.ipc.org/html/forum.htm) for additional information. If you need assistance - contact Keach Sasamori at [log in to unmask] or 847-509-9700 ext.5315 ##############################################################