Hi all,

Just a quick question. As a board manufacture we typically perform a solderability test ( solder float ) on a small piece cut out of a board that has at least 30 holes. Customers many times will
run a complete bare board thru the wave to check solderability. I have a situation with one customer that I has frequent rejections because one or two holes out of hundreds do not fill during the wave of the bare boards. All of my solder float tests pass and samples fromt the same lots rejected ran over someone elses wave solder fine. 
 
I would like to know what most people would accept on that type of solderability test. Specifically regarding instances of when one or two isolated holes fail to fill out of several hundred holes on a 5x8 board. I really do not know if I should expect all holes to fill 100% without leads.  Is there a specific specification that covers wave solder tests on complete bare boards?

Any help would be appreciated. 

Ed Cosper

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