The colours really changed when I wet the Graphitints, and it was very hard to keep the darker colours from bleeding into the lighter ones. I do wish there were more colours, since the colour selection is great for natural objects, but not so much for anything else. The pencils were easy to blend when dry and layered well. I am going to try another drawing with them, since I liked them enough to keep seeing the best way to use them. The only complaint about the pencils is the lack of colours.