When you have a build up of salts on your plating racks, they will start to plate up. Try using a 10-20% Sodium Hydroxide solution to remove the salts. Also, you may want to install the tank permanantly. After you unrack your panels, soak the racks in the solution to prevent the buildup in the first place. Just make sure you rinse the racks VERY well so as not to cross contaminate your pre-plate cleaning line. My buddy "Groovy" figured this one out for me!!! Steve Wentz Florida CirTech 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. For the technical support contact Dmitriy Sklyar at [log in to unmask] or 847-509-9700 ext.311 ##############################################################