Hello John

It can be used. It does seal the dust in. But, you may find that each time
you spray on the coating, the extra solvent will soften the original
coating and you could get very stuck. Literally!

We moved away from cardboard a long time ago in our coating services. It
is a challenge to meet ESD requirements, control dust, have suitable
reusable pallets and keep the cost down. We moved to MDF board and then
tried ESD bagging sheets on the top. This was really slippy and deadly for
dropping PCBs! 

So, finally we switched to waxed back paper over MDF which we change every
single time. Not very green but it stops all the problems, is right at the
edge of ESD safe due to the moisture in the paper and generates little
dust.

I hope that helps.

Best Regards

Dr Lee Hitchens
SCH Technologies




On 10/10/2014 00:11, "John Anselmo" <[log in to unmask]> wrote:

>Question: Is conformal coated cardboard safe to use in the conformal coat
>spray room?
>
>We sometimes use cardboard to support assemblies when they are sprayed.
>So if the cardboard is sprayed (all sides) before it is used as supports,
>is it ESD safe?
>
>Thanks,
>
>John
>
>
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