In a message dated 10/25/2000 9:38:43 AM Central Daylight Time, [log in to unmask] writes: > The boards are assembled and then wave soldered using water soluble flux. The > mask begins peeling during water wash in our Trieber SMT Cleaner. > > The wave temperature is 500F. Kester Water soluble flux #2235 is used with > Kester #4662 thinner to reach SG. The flux is applied with a foam fluxer. > Preheat temperature is 220F. Hi Richard! What kind of soldermask is it? LPI or Dry-Film? If dry-film, what brand. Do you use any sort of chemistry in your cleaner? I've had a few issues with certain dry-film masks and them being compatible with the chemistry we use... -Steve Gregory- --------------------------------------------------------------------------------- Technet Mail List provided as a free service by IPC using LISTSERV 1.8d To unsubscribe, send a message to [log in to unmask] with following text in the BODY (NOT the subject field): SIGNOFF Technet Search previous postings at: www.ipc.org > On-Line Resources & Databases > E-mail 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 ---------------------------------------------------------------------------------