The @sakuraofamerica #permapaque white marker is not fully opaque, but it's still a great addition to a white ink collection. Some of the things I like about it: it's water based and safe, does not smell at all, and provides a nice base for more opaque detailing with another pen, ink or paint over it. Not every pen in the Permapaque line has the milky type of ink base suitable for toned papers. But of those that do, I wanted to see if any of the markers were MORE brightly opaque than the white one. So I tested some of them out on the back cover of my pocket sized sketchbook. They're all pretty good, but white was the winner for me! I'm sticking with the white one.