Turner Colour Works U-35 is a heavy body acrylic paint with a stiff consistency. To keep colors from turning muddy, 66 of the 81 colors are made from a single pigment. The paint was designed for clear color and strong lightfastness. The name U-35 means "under 35."
There are 81 colors in all. Every color is sold on its own in 20 ml and 60 ml tubes. Sets include 12 colors in 11 ml tubes, and 12 or 24 colors in 20 ml tubes, among others.