Hi David, Steve is out today, not feeling well. He may monitor his mail. But, there was a thread a couple of weeks back about tin and purple tint on the surface of solder. It might be of interest. Guy -----Original Message----- From: TechNet [mailto:[log in to unmask]] On Behalf Of David Bealer Sent: Thursday, March 08, 2012 9:32 AM To: [log in to unmask] Subject: [TN] Discolored Leads on D-Case Tantalum Caps I have some tantalum caps that the leads are so discolored (a brown to purple tint to them) that the pick & place vision system is rejecting all of them. these are supposed to be 100% Sn plated, are MSL 3 rated, and these are new parts straight out of the manufacturer's packaging with no signs of breach. The leads also will wet out using solder paste with OA flux. If I can get the machine to place these what reliability issues could we be facing? I have a picture of several parts that I'll ask Steve to post. David Bealer | SMT Department Manager Phone: (217) 442-0611 ext. 6022 | Fax: (217) 477-7134 Watchfire Signs by Time-O-Matic Inc. [log in to unmask]<mailto:[log in to unmask]> www.watchfiresigns.com<http://www.watchfiresigns.com/> ______________________________________________________________________ This email has been scanned by the Symantec Email Security.cloud service. For more information please contact helpdesk at x2960 or [log in to unmask] ______________________________________________________________________ ______________________________________________________________________ This email has been scanned by the Symantec Email Security.cloud service. For more information please contact helpdesk at x2960 or [log in to unmask] ______________________________________________________________________