Not ridiculous, absolutely accurate. It is the homogenous material which is the ruling factor, and one ball of 63/37 is not the same homogenous material as the rest of the SAC alloy balls....................... The number of balls, weight of the equipment - non have anything to do with the RoHS directive it is the percentage of any homogenous material that is the requirement. John ------------------------------------ Avanex John Burke Senior Manager RoHS Compliance [log in to unmask] 40919 Encyclopedia Circle Fremont CA 94538 tel: 510 897 4250 fax: 510 979 0189 mobile: 510 676 6312 ------------------------------------ -----Original Message----- From: TechNet [mailto:[log in to unmask]]On Behalf Of Brian Ellis Sent: Thursday, September 15, 2005 12:20 AM To: [log in to unmask] Subject: Re: [TN] washing of misprints and stencils with leaded and lead-free That is a ridiculous statement. RoHS permits a tolerance of 0.1% lead. So, if you had one ball containing 37% lead and about 400 balls containing no lead, you would be at the limit, remembering the difference in SG. I've never counted how many balls there are in solder joints of different components, but I'd guess there would be more than 400 in the attachment of an average IC (a lot more if it were a microprocessor or other high I/O device). So one ball (or even several balls) of leaded lost in a myriad balls of LF will make no difference in RoHS compliance with an average assembly. Brian Reuven ROKAH wrote: > You should separate the two processes. > > even one solder ball of leaded solder will make your product not comply to > RoHS. > > Reuven > > > e mail: [log in to unmask] > > > > Ron Cullen <ronc > @ARTESYNCP.COM> To: [log in to unmask] > Sent by: TechNet cc: > <TechNet@ Subject: [TN] washing of misprints and stencils with leaded and lead-free > ipc.org> > > > 14/09/2005 21:07 > Please respond > to TechNet > E-Mail Forum; > Please respond > to Ron Cullen > > > > > > Is anyone planning on having separate misprint and stencil wash processes > for leaded and lead-free because of potential cross contamination issues? > We are using a spray wash system with alcohol. > > --------------------------------------------------- > Technet Mail List provided as a service by IPC using LISTSERV 1.8e > 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 Listserv@ > ipc.org: SET Technet Digest > Search the archives of previous posts at: http://listserv.ipc.org/archives > Please visit IPC web site http://www.ipc.org/contentpage.asp?Pageid=4.3.16 > for additional information, or contact Keach Sasamori at [log in to unmask] or > 847-615-7100 ext.2815 > ----------------------------------------------------- > > --------------------------------------------------- > Technet Mail List provided as a service by IPC using LISTSERV 1.8e > 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 > Please visit IPC web site http://www.ipc.org/contentpage.asp?Pageid=4.3.16 for additional information, or contact Keach Sasamori at [log in to unmask] or 847-615-7100 ext.2815 > ----------------------------------------------------- > -- ______________________________________________ Please note new e-mail address [log in to unmask] --------------------------------------------------- Technet Mail List provided as a service by IPC using LISTSERV 1.8e 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 Please visit IPC web site http://www.ipc.org/contentpage.asp?Pageid=4.3.16 for additional information, or contact Keach Sasamori at [log in to unmask] or 847-615-7100 ext.2815 ----------------------------------------------------- --------------------------------------------------- Technet Mail List provided as a service by IPC using LISTSERV 1.8e 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 Please visit IPC web site http://www.ipc.org/contentpage.asp?Pageid=4.3.16 for additional information, or contact Keach Sasamori at [log in to unmask] or 847-615-7100 ext.2815 -----------------------------------------------------