Juan, Steve, et al, If you do a calculation, you may find that it is difficult to change the tin % by adding solder bars. I did some calculations some years back and was amazed at how much solder you'd have to add. That was for a wave solder machine, and it sounds like you have a big solder pot. Louis Hart -----Original Message----- From: TechNet [mailto:[log in to unmask]] On Behalf Of Juan T. Marugán Sent: Thursday, March 10, 2011 3:42 PM To: [log in to unmask] Subject: [TN] Solder bath analysis. Sn63Pb37 alloy. I have a question about the variation of the tin content in the solder alloy and I'm sure that somebody will explain it me. Why the tin content decrease more than 1% from the nominal of the Sn63Pb37 alloy? May it be by the dross...? I suppose that it will be neccesary to add pure tin. Is it correct? Thank you for your support. Kind regards. Juan Indra Sistemas SA Spain ------ ______________________________________________________________________ This email has been scanned by the MessageLabs Email Security System. For more information please contact helpdesk at x2960 or [log in to unmask] ______________________________________________________________________ --------------------------------------------------- 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.aspx?Pageid=E-mail-Forums for additional information, or contact Keach Sasamori at [log in to unmask] or 847-615-7100 ext.2815 -----------------------------------------------------