I've never done a blacklight from digital, so you can ignore this if you like. It seems to me, that you'd have to do a "layer from original", and remove everything but what you want highlighted. the printing would be a two-step process... first would be the normal print, then the "glow" ink would be applied. If you want to do the whole thing in Flourescent inks, they are available, though I don't have any info on specifics. One thing, "Day Glo" paints work very well in this medium, but they would have to be hand applied. Lou.

"..... and that was when things got interestiing."