Steve, That appears to me to be tape that has not been removed from the board, rather than any residues from the adhesive. I have used the Humiseal tape with success and have not seen these kinds of failures when the tape is removed while the coating is wet. If you allow the coating to dry or be tack free, then you get these kinds of problems. I would expect you to have the same problem with other kinds of tape. Doug Pauls Steve Gregory <SGregory@OAIELEC TRONICS.COM> To Sent by: TechNet [log in to unmask] <[log in to unmask]> cc Subject 02/02/2007 11:30 [TN] Humiseal Masking Tape AM Residues... Please respond to TechNet E-Mail Forum <[log in to unmask]> ; Please respond to Steve Gregory <SGregory@OAIELEC TRONICS.COM> Hi All! I have a conformal coat masking problem too along with KennyB. We're getting residues from the Humiseal tape we're using when we remove the tape. We're coating the boards with 1B31, and we don't bake the boards with the tape on. We take the tape off right after we spray the board. Check out: http://stevezeva.homestead.com/files/Tape_Residues.jpg I've not had this problem with Humiseal tape before. Our customer is rejecting the boards and it is quite time consuming to remove these residues. I've got a call into Humiseal to see if they can help. Do any of you use any other tape for masking that doesn't leave residues? Have a great Friday! -Steve Gregory- --------------------------------------------------- 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 ----------------------------------------------------- --------------------------------------------------- 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 -----------------------------------------------------