Ken You must take into consideration the aspect ratio of your boards that will have immersion silver put on them. While I understand from the two additonal posts that you might be able to successfully get complete coverage, I have seen too many boards with bare copper in the holes subsequently attacked by either silver chemistry or assembly chemistries that have failed. Pluggin one end of a hole creates a "cup" which is difficult to get solutions into and out of when processing. Perhaps the group has guidelines for aspect ratios where one side plugs prior to final finish are NOT recommended as manufacturable. Susan Mansilla Robisan Laboratory --------------------------------------------------- Technet Mail List provided as a 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/contentpage.asp?Pageid=4.3.16 for additional information, or contact Keach Sasamori at [log in to unmask] or 847-615-7100 ext.2815 -----------------------------------------------------