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?
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Re: Application method for Liquid Soldermask (UV cured ink)
2013-11-26 by Paul Alciatore