Having run analysis on solder a number of times in the four different ways. The different method tend to provide slightly different compositional answers which shouold somewhat over ride the worry about whether it is exactly eutectic or not. Also specs. call out the tin and some other elements with remainder lead. Many solders contain antimony up to 0.5 Sb. They also have a host of other impuities listed as max., but adding together that may also have a impact on the remainder Pb % which may fall below the eutetic mix. Also the total solder joint does not cool in the same micro-micro second so there may be liquidus and solidus existing n the same joint a one time. Solder that is near eutectic is near enough for any applications that I am aware. Phil Hinton Hinton "PWB" Engineering . *************************************************************************** * TechNet mail list is provided as a service by IPC using SmartList v3.05 * *************************************************************************** * To unsubscribe from this list at any time, send a message to: * * [log in to unmask] with <subject: unsubscribe> and no text. * ***************************************************************************