Chris - I have to assume that your are referring to IPC-TM-650, test method 2.6.4. ASTM E 595 Standard Test Method for Total Mass Loss (TML) and Collected Volatile Condensible Materials (CVCM) from Outgassing in a Vacuum Environment and NASA General Specification SP-R-0022 Vacuum Stability Requirements of Polymeric Material for Spacecraft Applications establish the following limits, for cured materials: 1% or less TML; and 0.01% CVCM. Water vapor loss (WVR) is generally allowed to be deducted from the TML total. I can be reached at 256.882.4536 if necessary. Regards - Kelly ################################################################ 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 ################################################################