If it were incorrect cure/application, and all process parameters were equal during wave solder, then I would expect all boards to exhibit similar conditions???? Also, using that no clean flux...why are they using a saponifer anyway? Especially after sitting for 1 - 2 days with this residue on it??? It has been my understanding that when using a no clean flux, with all process parameters within control, no post cleaning is required... ----- Original Message ----- From: Charlie Pitarys To: [log in to unmask] Sent: Wednesday, April 30, 2003 8:49 AM Subject: [TN] Intermittent solder mask problems, again. Can anyone share process issues with Enthone solder mask? The customer has used my saponifier for just over a year with no issue like this. Flux used is Alpha RF800 (foam fluxer) pre-heat at 225 F and solder pot at 490 F w a conveyor speed of 3 ft / min, Saponifier wash concentration was 10 %, temp at 120F, for 10 mins. Solder mask used is Enthone DSI 41G. Please explain on a batch of 50 boards, 5 were perfect, 5 were very bad with solder mask peeling, and 40 in the middle with minimal fading. All the processes were the same for all, all sat for 1-2 days after wave solder. Where the board was masked for secondary attachment ( mask removed prior to clean) and also shadowed by the wave fingers there is no changing of the overall green color. If the wash chemistry is the culprit then it would affect every board and in a uniform fashion. I have photos to share, maybe Steve G. will let me post them on his sight? My suspicions are, incorrect cure, application etc. of the Enthone mask. Thanks in advance. Charlie Pitarys Director of Application Technologies 603.622.2900 X-115 www.kyzen.com --------------------------------------------------- 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 ----------------------------------------------------- --------------------------------------------------- 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 -----------------------------------------------------