Lou, Many companies use a Polyimide label that is printed by a thermal printer. To be specific, one supplier is Brady and the THT series. These "bottom side circuit board" labels are designed "for direct exposure through wave solder and mixed SMT processes" There isn't an environment much harsher than the wave solder. Regards, Phil Nutting Manufacturing Engineer Kaiser Systems, Inc. High Voltage Power Supplies That Work(tm) 126 Sohier Road Beverly, MA 01915 ph: 978-922-9300 fx: 978-922-8374 [log in to unmask] -----Original Message----- From: Lou Hart [mailto:[log in to unmask]] Sent: Wednesday, November 22, 2000 9:10 AM To: [log in to unmask] Subject: [TN] Labeling of PC boards TechNetters, Here is a low-tech question. I have a customer who has been calling for printing of board numbers, revs, serial numbers using epoxy ink. This operation is time consuming, messy, prone to human error. We've been talking about using computer-printed paper labels instead of epoxy ink. The environment these boards go into is not particularly benign. Some are used in train cars. They get an acrylic conformal coating. Has anyone had experience in the matter of label durability? Any test methods to suggest? Thanks for any comments. Lou Hart 412-858-6184 Compunetix ---------------------------------------------------------------------------- ----- Technet Mail List provided as a free service by IPC using LISTSERV 1.8d To unsubscribe, send a message to [log in to unmask] with following text in the BODY (NOT the subject field): SIGNOFF Technet Search previous postings at: www.ipc.org > On-Line Resources & Databases > E-mail Archives Please visit IPC web site (http://www.ipc.org/html/forum.htm) for additional information, or contact Keach Sasamori at [log in to unmask] or 847-509-9700 ext.5315 ---------------------------------------------------------------------------- ----- --------------------------------------------------------------------------------- Technet Mail List provided as a free service by IPC using LISTSERV 1.8d To unsubscribe, send a message to [log in to unmask] with following text in the BODY (NOT the subject field): SIGNOFF Technet Search previous postings at: www.ipc.org > On-Line Resources & Databases > E-mail Archives Please visit IPC web site (http://www.ipc.org/html/forum.htm) for additional information, or contact Keach Sasamori at [log in to unmask] or 847-509-9700 ext.5315 ---------------------------------------------------------------------------------