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.
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