Hello Joe - Our tech staff recommends IPC/J-STD-609A, IPC/JEDEC Marking and Labeling of Components, PCBs and PCBAs to Identify Lead (Pb), Lead-Free (Pb-Free) and Other Attributes. Written to cover this type of question. www.ipc.org/609A<http://www.ipc.org/609A>. Hope that helps. Kim Sterling, IPC Subject: standard industry silkscreened symbology for Pb-free assembly<http://listserv.ipc.org/scripts/wa.exe?A2=TECHNET;2f226e8f.1109> From: Joe Macko <[log in to unmask]<http://listserv.ipc.org/scripts/wa.exe?LOGON=A2%3Dind1109%26L%3DTECHNET%26F%3D%26S%3D%26P%3D138788>> Reply-To: TechNet E-Mail Forum <[log in to unmask]<http://listserv.ipc.org/scripts/wa.exe?LOGON=A2%3Dind1109%26L%3DTECHNET%26F%3D%26S%3D%26P%3D138788>>, [log in to unmask]<http://listserv.ipc.org/scripts/wa.exe?LOGON=A2%3Dind1109%26L%3DTECHNET%26F%3D%26S%3D%26P%3D138788> Date: Thu, 15 Sep 2011 13:46:48 -0700 Content-Type: text/plain Parts/Attachments: [cid:[log in to unmask]] text/plain<http://listserv.ipc.org/scripts/wa.exe?A3=ind1109&L=TECHNET&E=quoted-printable&P=1182194&B=--&T=text%2Fplain;%20charset=utf-8&header=1> (36 lines) All, Looking for some guidance on what symbology should be stenciled onto Pb-free circuit boards to inform the user/rework person that they are Pb-free boards. Some of our products are SnPb and some are Pb-free. It would be helpful to have a Pb-free symbol stenciled onto each Pb-free board. thx Best Regards, -Joe --------------------------------------------------- Technet Mail List provided as a service by IPC using LISTSERV 16.0 To unsubscribe, send a message to [log in to unmask] with following text in the BODY (NOT the subject field): SIGNOFF Technet To temporarily halt or (re-start) delivery of Technet send e-mail to [log in to unmask]: SET Technet NOMAIL or (MAIL) To receive ONE mailing per day of all the posts: send e-mail to [log in to unmask]: SET Technet Digest Search the archives of previous posts at: http://listserv.ipc.org/archives For additional information, or contact Keach Sasamori at [log in to unmask] or 847-615-7100 ext.2815 -----------------------------------------------------