Gaby, When you use the term "White Tin" you're not specifying which "White Tin" process you are talking about. They are not all created equal. I haven't heard of any negative results from the White Tin I'm dealing with. I have alot of information on the process and would be happy to discuss any issues with you. Stephen M. Wentz ################################################################ TechNet E-Mail Forum 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's web site (http://www.ipc.org) "On-Line Services" section for additional information. For technical support contact Hugo Scaramuzza at [log in to unmask] or 847-509-9700 ext.312 ################################################################