We worked on this for lighting panels on displays. The initial attempts had too much light absorption, but second generation gave favorable results. I do not have any long term durability numbers yet on how it would age, but certainly yellowing would affect the reflectivity capability. Dewey -----Original Message----- From: TechNet [mailto:[log in to unmask]] On Behalf Of Dennis Fritz Sent: Monday, April 25, 2011 11:50 AM To: [log in to unmask] Subject: Re: [TN] White solder mask discoloration Most recently, I had seen white solder mask on boards (metal core?) going to the LED lighting industry (reflectors). I understand the IPC effort on boards for LED lighting was being centered on the China office. I have copied David Bergman of IPC on this response, as he may provide links to all kinds of technology for white mask. -----Original Message----- From: Jean-Francois Bissonnette <[log in to unmask]> To: TechNet <[log in to unmask]> Sent: Fri, Apr 22, 2011 9:19 am Subject: [TN] White solder mask discoloration Hi Technetters, Does anyone have experience with white solder mask? Any chances of success assing these through reflow without discoloration? We had a bunch of them sent to our CM and they all came back with a yellow o brown discoloration. I believe there are different types of solder masks ut there but is there some standard regarding their capacity to resist eat? The process used it RoHS. Thanks in advance! Jean-François Bissonnette DEPRO Électronique Inc 755, Curé-Boivin suite 101 Boisbriand, Québec Canada J7G 2J2 Ph. 450.430.6251 Poste/Ext: 109 Fax: 450.430.6251 _____________________________________________________________________ his email has been scanned by the MessageLabs Email Security System. or more information please contact helpdesk at x2960 or [log in to unmask] _____________________________________________________________________ --------------------------------------------------- echnet Mail List provided as a service by IPC using LISTSERV 16.0 o unsubscribe, send a message to [log in to unmask] with following text in he BODY (NOT the subject field): SIGNOFF Technet o temporarily halt or (re-start) delivery of Technet send e-mail to [log in to unmask]: SET Technet NOMAIL or (MAIL) o receive ONE mailing per day of all the posts: send e-mail to [log in to unmask]: SET Technet Digest earch the archives of previous posts at: http://listserv.ipc.org/archives or additional information, or contact Keach Sasamori at [log in to unmask] or 47-615-7100 ext.2815 ---------------------------------------------------- ______________________________________________________________________ This email has been scanned by the MessageLabs Email Security System. For more information please contact helpdesk at x2960 or [log in to unmask] ______________________________________________________________________ --------------------------------------------------- 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 ----------------------------------------------------- ______________________________________________________________________ This email has been scanned by the MessageLabs Email Security System. For more information please contact helpdesk at x2960 or [log in to unmask] ______________________________________________________________________ --------------------------------------------------- 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 -----------------------------------------------------