Tom, I would imagine that you are trying to get off all the white residue from the flux. As you have found, that residue is pretty tenacious. The reason for this is that the rosin has a tendency to polymerize after soldering and becomes very hard to remove with time. When we do hand soldering, our operators topically clean the area with an approved solvent, such as Flux Off, Proclean, Bioact SC-10, right after soldering. Then it goes through our saponified water wash (Kyzen Aquanox A4520) with no problems. The topical cleaning chemical bonds with the residue to create a very cleanable intermediate. As to the qualification, do you really need to? Is a customer driving such a test? I can see doing testing if you propose to eliminate a cleaning step, but very seldom have I seen the need when one is adding a localized cleaning step. Doug Pauls Rockwell Collins "Gervascio, Thomas" <[log in to unmask]> Sent by: TechNet <[log in to unmask]> 09/13/2008 02:14 PM Please respond to TechNet E-Mail Forum <[log in to unmask]>; Please respond to "Gervascio, Thomas" <[log in to unmask]> To [log in to unmask] cc Subject [TN] qualification of manual bench cleaning processes We have in the past abandoned manual defluxing after hand soldering (ROL0 and ROM0) rosin fluxes with in line saponified washes. Well in some cases we have to run boards seven times through the in line wash resulting in degraded anodized finish, part marking removal , etc. I am trying to gather the experiences and methodoloy to select the best type of manual defluxing processes and qualify to make sure that the process is adequate and any residues would be benign. Would start with the J-STD-001 cleaning process qualification testing on materials and residues but was trying to see what other folks are using out there rather than being bombarded with sales pitches. Any experiences and information would be appreciated. Tom --------------------------------------------------- Technet Mail List provided as a service by IPC using LISTSERV 15.0 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 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 15.0 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 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 -----------------------------------------------------