The name "liquid watercolor" is somewhat misleading. Ecoline is mainly used to color comics or other images in which colors aren't blended or supposed to interfere. You only use lighter and darker tones separately. They do not work like normal watercolor, you can't have the same effects, creating shades or let the color run, wet in wet for example. Ecoline is very good if you want to color images drawn in waterproof ink for example, in bright basic colors without blending them, like for highlighting parts of a composition like text markers would do, but smoother. They are also very interesting to do some drawing in one color, for example a cityscape in burnt sienna only. But in fact they aren't what we usually call "watercolors". Maybe they should be called "water based" colors.