Based on my experiences evaluating both 2D and 3D, my rule of thumb is; 2D works best to determine physical characteristics such as; Shorts, Tombstoning, Missing, Mis-aligned. Some of the selling schemes also include Polarity & Value Marking recognition which test less than accurate due to changes in the appearance of Ink markings. The 3D however, is more consistent if that is your quest.. Good Luck, Michael Laroe MSL-Lowell (978)677-2977 [log in to unmask] --------------------------------------------------- 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 -----------------------------------------------------