Hello all Is there anybody who have seen this problem: Foam in an ammonium chloride etcher What is the reason for that? We have cleaned the machine during the weekend and after that, the machine make a lot of foam. Jesper Pedersen Process Engineer Chemitalic A/S ################################################################ 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's web site (http://www.ipc.org) "On-Line Services" section for additional information. For technical support contact Hugo Scaramuzza at [log in to unmask] or 847-509-9700 ext.312 ################################################################