We recently received product in which it was noted that the board coloration
was different than those we had received before. The distributor stated that
this was because they came from a different supplier (they use three
suppliers), but that the board was certified to FR-4 requirements. We
requested and received this material certification. The question(s) I have
are: What would cause a color change? Does this difference in coloration
affect the mechanical or electrical properties of the board? Where is
coloration covered by the IPC standards (if it is)? Any help would be
appreciated.
Dennis D. Carson
Cab and Controls Team
Phone:  309 - 748 - 2073
Fax:      309 - 765 - 2206
Internet Address:   [log in to unmask]

################################################################
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
################################################################