Hi Ioan, Could you use a label like they put on boards, they go through all the processes and stay on really good? Brady and other companies make them. KennyB -----Original Message----- From: Ioan Tempea [mailto:[log in to unmask]] Sent: Thursday, July 17, 2008 7:35 AM To: [log in to unmask] Subject: [TN] Indelible marking Dear Technos, I need to serialize about 200 BGAs (simply write on them sequential numbers 1-200). The BGAs will be assembled, SnPb process with water soluble flux, then washed in plain water in our in-line washer. In case the customer will not accept us scratching the numbers onto the top of the components, what kind of permanent ink can I use? And would you see any issue with scratching the top of the components? Thanks, Ioan --------------------------------------------------- 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 -----------------------------------------------------