From: NAME: WILLIAM G KENYON FUNC: Chemicals/Electronics TEL: 302-652-4272 <KENYONWG AT A1 AT ESVAX> To: NAME: [log in to unmask] <"[log in to unmask]"@ESDS01@MRGATE@ESVAX> 1. First- pls give a name and contact information with notes so that replies can be sent to you directly, which is often faster than posting them on the TechNet. 2. You will probably get lots of information on potential sources of sulphur contamination- such as packaging cartons etc. made by the Kraft process, but one that is not often obvious is the storage of PWBs and components near the employees cafeteria. Enterprises that serve breakfast in their canteens often cook eggs...and the resulting sulphur in the air ends up on the PWBs. Not obvious--- but it has happened. W. G. Kenyon Global Centre for Process Change, Inc. 302-652-4272/-5701 Tel/Fax