Piezography K7 Selenium ink is available in seven shades. It is both a gloss and matte paper formulation, yet still does not contain any trace dye. Gloss compatibility is arrived at by inclusion of polyesters. The ink however, dries matte on matte papers. The best gloss results require either printing with Gloss Optimizer or a more simple spraying with a material such as Lumijet spray. Piezography Selenium inks have a short bath Selenium toning appearance reminiscent of a fiber based silver print. This is perhaps our most gorgeous ink set which looks very similar to the type of printing seen in Museum exhibitions. This ink like Neutral, will also respond to warmer or cooler papers. Piezography Selenium inks have virtually zero metamerism and fade. This is a superior quality ink designed for highest standard black & white printing. The best results are gained by using Piezography made profiles for QuadTone RIP. If the user is going to print only on matte paper they will be better served by using the Shade 1 of Neutral for slightly better dMax.