Dear Technetters, We are facing problem in tin plating. In pad areas plating is dull and in remaining areas plating is bright. This results in removal of copper from pad areas in etching stage. Can any one tell us reason for dull plating in pad areas and also suggest remedy for the same. We are using grauer & weil chemistry for tin plating. Regards, Mr. Murulidhara S. Deputy Chief Engineer , PCB and Chemical Lab - R&D, ITI Ltd. , Dooravani Nagar , Bangalore INDIA PIN-560 016 Ph : 91-080-8503959 Fax : 91-080-5650971 --------------------------------------------------- Technet Mail List provided as a free service by IPC using LISTSERV 1.8e 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/html/forum.htm for additional information, or contact Keach Sasamori at [log in to unmask] or 847-509-9700 ext.5315 -----------------------------------------------------