The first exposure is long enough that the areas you want to stay on are
somewhat hard, take it out, remove the artwork, wash off the uncured
pads, then re-expose (without artwork since you have cleaned off the
areas you were masking anyway) to fully cure.
Paul Alciatore wrote:
>
>
> I have not heard of this soldermask and am puzzled. You expose it the
> first time with the artwork and then expose it again for a lot longer
> time without the artwork. I am curious as to how this works. It seems
> like it would all just harden. Can you post some links to this that
> may explain it better?
>
>