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  1. What is the yellowy substance on the 'solder' side of arcade PCB's

    Apologies for the delay in posting pic's. Unfortunately I've taken a few of some of my PCB's and things don't really show up that well in the photo's so I'm posting pics of one the more extreme cases, namely a 'Prehistoric Isle in 1930' bootleg. The solder side of both PCB's are entirely yellow...

  2. What is the yellowy substance on the 'solder' side of arcade PCB's

    Ahh, so it's part of the manufacturing process then! I suppose as a protective from the elements (heat), cracks, scrapes that sort of thing?

  3. What is the yellowy substance on the 'solder' side of arcade PCB's

    Hi XianXi, thanks for the reply. So from your experience have you found that solder flux can drench a PCB to such an extent that is practically covered with the stuff?

  4. What is the yellowy substance on the 'solder' side of arcade PCB's

    What is the yellowy substance on the 'solder' side of arcade PCB's Hello everybody! I'm new to these forums and newish to arcade PCB collecting in general and have a question I hope some of the folk with more experience in arcade gaming and PCB's in general might help me with...maybe... Every...
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