Dave, thanks for the reply. What detrimental effects should I be worrying about if/when Nickel levels go above the stated maximum of 0.01% and at what point is this considered bad enough to dump the soldr bath contents and start afresh? The machine suppliers tell me that even treated stainless parts (chrome carbide?) still allow the nickel to dissolve into the pot contents. Regards Nigel Burtt Production Engineering Manager Dolby Laboratories, Inc. - European HQ Email: mailto:[log in to unmask] Tel: +44 (0)1793 842132 [direct line with voicemail] Fax: +44 (0)1793 842101 ----------------------------------------- This message (including any attachments) may contain confidential information intended for a specific individual and purpose. If you are not the intended recipient, delete this message. If you are not the intended recipient, disclosing, copying, distributing, or taking any action based on this message is strictly prohibited. --------------------------------------------------- Technet Mail List provided as a service by IPC using LISTSERV 15.0 To unsubscribe, send a message to [log in to unmask] with following text in the BODY (NOT the subject field): SIGNOFF Technet To temporarily halt or (re-start) delivery of Technet send e-mail to [log in to unmask]: SET Technet NOMAIL or (MAIL) To receive ONE mailing per day of all the posts: send e-mail to [log in to unmask]: SET Technet Digest Search the archives of previous posts at: http://listserv.ipc.org/archives Please visit IPC web site http://www.ipc.org/contentpage.asp?Pageid=4.3.16 for additional information, or contact Keach Sasamori at [log in to unmask] or 847-615-7100 ext.2815 -----------------------------------------------------