Subject: Thick Electroless - try a proprietary anti tarnish followed by a hot DI rinse prior
to tank drying - it works for us!, but check with your dry film supplier
first for compatability

Dougal Stewart,Exacta Circuits, Scotland

 re-
Hello Technet ! We intend to switch our PTH process from thin copper electroless plus electrolytic strike to thick ( hot )
electroless , 2 microns thick . The line will be loaded with baskets , so we do expect the PCBs will be oxidized.We are considering
some kind of chemical treatment prior to dry film lamination instead of pumice scrub.Wjhat kind of treatment is recommended ...?

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