---------- Matt Which soldermask is having the problem? I have heard you are using Ciba and some other lpi. Is the problem occuring on both masks or just one? John Haman Jr. American Board Companies, Inc Process / Product Engineer > Has anyone every had experience developing solder mask on gold plated > boards? We get the impression that the mask has an affinity for the > gold. It leaves stains that are very hard to remove. We see them > after developing, & are looking for a method to remove them before > curing. > > > Matt Byrne > HADCO-Owego > ################################################################ TechNet E-Mail Forum provided as a free service by IPC using LISTSERV 1.8c ################################################################ To subscribe/unsubscribe, send a message to [log in to unmask] with following text in the body: To subscribe: SUBSCRIBE TechNet <your full name> To unsubscribe: SIGNOFF TechNet ################################################################ Please visit IPC web site (http://jefry.ipc.org/forum.htm) for additional information. For the technical support contact Dmitriy Sklyar at [log in to unmask] or 847-509-9700 ext.311 ################################################################