Hi TechNet - You can use ANSIJ-STD-003 for the evaluation of solderable finishes. I would not recommend visual criteria as the sole indicator of the 'goodness' of a surface finish. Visual criteria can be useful but some type of reflow test would be recommended. HASL finish thicknesses can vary greatly across a pwb. Good Luck. Dave Hillman JSTD 003 Chairman [log in to unmask] ______________________________ Reply Separator _________________________________ Subject: FAB: HASL Finish Author: [log in to unmask] at ccmgw1 Date: 4/22/97 8:02 PM First I appreciate the information I received from my previous post. I need some help for solder finish of PCB. Why do they look dull and hazel sometime ( not uniform and shinny). Manufacture checks the solder pot and everything ,including copper content, is within range. What I see there is quite heavy flux floating on the top of the solder and solder flow is quite slow ( flux is OA type). What will be the best way for Manufacture controlling the solderability without damaging boards. Now only visual check and wait for complaining. *************************************************************************** * TechNet mail list is provided as a service by IPC using SmartList v3.05 * *************************************************************************** * To subscribe/unsubscribe send a message <to: [log in to unmask]> * * with <subject: subscribe/unsubscribe> and no text in the body. * *************************************************************************** * If you are having a problem with the IPC TechNet forum please contact * * Dmitriy Sklyar at 847-509-9700 ext. 311 or email at [log in to unmask] * *************************************************************************** *************************************************************************** * TechNet mail list is provided as a service by IPC using SmartList v3.05 * *************************************************************************** * To subscribe/unsubscribe send a message <to: [log in to unmask]> * * with <subject: subscribe/unsubscribe> and no text in the body. * *************************************************************************** * If you are having a problem with the IPC TechNet forum please contact * * Dmitriy Sklyar at 847-509-9700 ext. 311 or email at [log in to unmask] * ***************************************************************************