Liquitex Regular is the stiff type in the Liquitex acrylic paint range. Straight from the tube, it is thick enough to build up in heavy layers. You can also use a knife to leave marks like brushstrokes. It dries to a gloss.
There are 119 colors in all. Each color is sold on its own in a 20 ml tube. There are also 60 ml and 120 ml tubes. Sets come in 12, 18, 24, 36, 72, and 107 colors, and there are starter sets with brushes and a palette.
You thin the paint with water. Once dry, it no longer dissolves in water, so you can paint other colors over it.