ah it's just liquid watercolour i guess? it's called ecoline here cos it's the name of the brand that sells it. i think you work with it as well? what i like about it is that the paper sucks it up so you drop it and it spreads around and if you use different colours they mix very nice. it's good for when you want to let loose control and have surprising results.What's ecoline about yyal? Not heard of it. Any good?