Hi, All I see a lot of message abour LPI stripping and wonder what about thermal cured soldermask which is much more difficult to be stripped than UV ink. Is there any chemical avaiable for that? Does this fact imply chemical and thermal resistance of thermal cured ink is actually better than LPI ink. LPI just has better resolution. ---------- From: [log in to unmask][SMTP:[log in to unmask]] Sent: Saturday, June 14, 1997 5:55 PM To: [log in to unmask] Subject: Re: Re[2]: LPISM Stripping I'm not sure if it has tremendously improved over the past two years; however, most PWB shops will try to strip LPI masks (even after final cure) in preference to scrapping out the boards. The basic requirements for stripping cured LPI solder masks after final cure are: 1. High pH (>13.0) 2. High temperature (150-180 deg F) 3. Patience (it could take up to 48 hours) A number of companies have proprietary solder mask strippers on the market which work well. Examples would include: Alpha Metals, Oliver Sales, Dexter Electronic Materials, etc. Hope this helps Larry Fisher Dexter Electronic Materials [log in to unmask] *************************************************************************** * TechNet mail list is provided as a service by IPC using SmartList v3.05 * *************************************************************************** * To subscribe/unsubscribe send a message <to: [log in to unmask]> * * with <subject: subscribe/unsubscribe> and no text in the body. * *************************************************************************** * If you are having a problem with the IPC TechNet forum please contact * * Dmitriy Sklyar at 847-509-9700 ext. 311 or email at [log in to unmask] * *************************************************************************** *************************************************************************** * TechNet mail list is provided as a service by IPC using SmartList v3.05 * *************************************************************************** * To subscribe/unsubscribe send a message <to: [log in to unmask]> * * with <subject: subscribe/unsubscribe> and no text in the body. * *************************************************************************** * If you are having a problem with the IPC TechNet forum please contact * * Dmitriy Sklyar at 847-509-9700 ext. 311 or email at [log in to unmask] * ***************************************************************************