They have a nice matte finish (which preserves the ink better I've found).
The designs are some kind of printed ink which has a shiny surface and almost looks like it was 3d printed on.The only thing is I can tell I must have left a few white pixels on the artwork (rather than pure single-color vector graphics). So they're not perfect. Still, I like them even though if you look closely you can see the imperfection. The idea behind these was for an alternate set to differentiate Zargon's dice from those used by the Heroes.






Now if I really wanted to spend some serious cash, I could get inscribed plastic dice (unfortunately only in white). I'll have to think long and hard about that...