I believe the use of cold storage may be intended slow or minimize the copper-tin intermetallic growth. If I simply bake a board for a long time, the copper-tin intermetallic grows faster and can become problematic for soldering. I'd question how much shelf life I'm buying by reducing the storage temp from 25C to 14C. One man's opinion. ______________________________ Reply Separator _________________________________ Subject: [TN] Storing PCB's Author: "TechNet E-Mail Forum." <[log in to unmask]> at smtp Date: 5/14/98 11:53 PM I am confused. For years, I have understood that the best way to store pcb's prior to assembly is in a heated, relatively dry environment. I am sure that the general consensus amongst most manufactureres is that this works best. Well, just recently I was told by a company setting up a new facility that they had been advised by a well known consultant to use a cold dry environment. They are planning a 12-14 degree Celsius storeroom, once again relatively dry. Is there new thinking on this, or have they been badly advised? [Nicholas Kane] [Axion Australasia] [Suite 3, 651 Canterbury Road] [Surrey Hills] [Victoria 3127 Australia] [tel: 613 9899 3511 fax: 613 9899 3811] ################################################################ 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 ################################################################ ################################################################ 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 ################################################################