What is the thickness of your film. You should be using 7mm, nothing less. 3mm will expand and contract almost at will. You should also store your film in a humidity and temperture controlled environment. Don't measure the film immediately after it comes out of processing since it has expanded during drying. It will stabilize back to original size shortly. If you photoplot your own artwork, is your photoplotter in a stabilized environment? Larry Campbell BFGoodrich, Avionics Systems >>> Marco Biagtan <[log in to unmask]> 05/20/98 11:13pm >>> Hi Guys, I have a problem with dimensional stability of photo tools. The photo tools shrink after processing. I've tried increasing the drying temperature (50-55C) just so it will not shrink but it still does. This is really giving me a headache. Any suggestions? Marco Biagtan NEC-CPI Process Engineer. ################################################################ 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 technical support contact Hugo Scaramuzza at [log in to unmask] or 847-509-9700 ext.312 ################################################################ ################################################################ 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 technical support contact Hugo Scaramuzza at [log in to unmask] or 847-509-9700 ext.312 ################################################################