As far as I know only an alkaline solution is able to strip solder mask. One of our suppliers said we would need a different formula of SM for a PCB that had an application in an alkaline environment. Volkmar Huss, C.I.D. Email: mailto:[log in to unmask] Website: http://www.Prettl.com > -----Original Message----- > From: Walton, Jim [SMTP:[log in to unmask]] > Sent: Friday, October 07, 2005 1:40 PM > To: [log in to unmask] > Subject: [DC] removing soldermask > > What chemical would best remove soldermask without damaging the > underlying bare copper and laminate? > > James M. Walton > > Mngr, PCB Development > > Gentex Corp. > > 616-772-1590 x622 > > > > -------------------------------------------------------------------------- > ------- > DesignerCouncil 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 DesignerCouncil. > To temporarily stop/(restart) delivery of DesignerCouncil send: SET > DesignerCouncil NOMAIL/(MAIL) > Search previous postings at: www.ipc.org > On-Line Resources & Databases > > E-mail 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 > -------------------------------------------------------------------------- > ------- --------------------------------------------------------------------------------- DesignerCouncil 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 DesignerCouncil. To temporarily stop/(restart) delivery of DesignerCouncil send: SET DesignerCouncil NOMAIL/(MAIL) Search previous postings at: www.ipc.org > On-Line Resources & Databases > E-mail 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 ---------------------------------------------------------------------------------