Opportunity is missed by most people because it is dressed in overalls and looks like work. - Thomas Edison
We print these all the time. I know I posted something up but cant find it. We use anywhere between 5-20% color and the rest soft hand clear or curable reducer depending on the effect we want. 90% of the time it is a transparent white or transparent black that we mix. On tri blends and 50/50's you can also play with the heat to get it to sublimate into the ink a little bit more adding to the effect and make very difficult for other printers to replicate. It produces a waterbase type feel with very little to almost no hand on the print. Use high mesh counts and triple duro blades for the best results.