6 tone prints give a bit more dimension. Than the 4. The 6 tone set can be printed primarily on only coated stocks. Quad set works very well on Sommerset velvet. The Lyson papers all the way to the canvass texture _(rough) or Luminous Flaxen weave prints well also. Have not seen any fading on Sommerset. The 6 tone set is still in testing. Did notice a very strange effect of color shift toward redish sepia with the Lyson, seemed to stop with an application of Krylon 1305 UV matt spray. Lyson has yet to get to me about this shift. Happened with both OEM and MIS, CMYK, quad and sixtone. Hummmm Kevin - Please: Stay on topic. Trim quoted messages. http://www.leben.com/lists for list instructions.