Re: gum exposures with NuArc 26-1K?
PS: I once had a student sho discovered after long trail of tears that her easel had been equipped with UV proof glass by a well-meaning glazier. She was having new glass put in prepratory to teaching her first workshop after graduating. Class was a shambles, as you can perhaps imagine, until somehow she stumbled on the cause. That UV glass is of course intended for picture framing, to keep prints from fading on s sunny wall.. J.
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