I would suggest looking more closely at the preclean. Is it possible that
you are using Aluminum oxide or pumice preclean?

Dave Rooke
Circo Craft - Pointe Claire

---------------------
>We have been exhibiting miniature size nodules on our panels for quite
>some time. These miniatue nodules resemble a slightly high brightner
>burn. 
>I was wondering if anybody can give me a few suggestions to where I
>should look. 
> 
>Afew test I have ran were with bare laminate through a scrubber before
>plating. Nodules appeared on them. 
> 
>Afew more experiments were ran through different preclean lines and all
>led to the same result, nodules.
>
>My questions if anybody could help are:
>1. Would a rectifier with too high ripple affect the leveling of copper
>plating?
>2. We currently hot load our racks into the bath, the program is set up
>with a five second lag  and raises from 0 amp to calculated amperage. So
>the panel sees 5 seconds of 0 amps before the rectifier applies voltage.
>Could this be a contributor? 
>
>Timothy Gaylor

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