What is a simple test to tell the difference between alcohol and water based fluxes? Both are 3% solids flux. I am running both fluxes in the same machine. The concern is that the wrong flux is loaded during a change over. They behave so differently that the use of the wrong one will result in badly soldered boards. Our long term solution is seperate flux tanks and spray nozzels if it continues with bar code verified replenishment. In the mean time what would be a quick test? The weight of an alchol flux on the PCB is inconsistent due to evaporation. --------------------------------------------------- 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 -----------------------------------------------------