TechNetters, in 7711, method 3.6.3, Gull Wing Removal (two-sided) - Flux application method, step 5 says "Remove old solder from tip and thermal shock tip with damp sponge". Other rework methods say the same thing - thermal shock tip. Can someone explain why the thermal shock is necessary or useful? Removing old solder seems like a good idea, and seems to entail thermal shock on the sponge as well. Any comments would be appreciated. Lou Hart --------------------------------------------------------------------------------- Technet Mail List provided as a free service by IPC using LISTSERV 1.8d 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 delivery of Technet send e-mail to [log in to unmask]: SET Technet NOMAIL To receive ONE mailing per day of all the posts: send e-mail to [log in to unmask]: SET Technet Digest Search previous postings at: www.ipc.org > On-Line Resources & Databases > E-mail Archives Please visit IPC web site http://www.ipc.org/html/forum.htm for additional information, or contact Keach Sasamori at [log in to unmask] or 847-509-9700 ext.5315 ---------------------------------------------------------------------------------