As I started sketching out the outline on toned paper, I noticed quickly that the pencils behaved the same as any other graphite pencil. When I tried to build up a darker tone with the pencils, however, I was a little disappointed with it's performance. I couldn't seem to get the tone evenly dark or dark enough without using the water. When I dragged a damp brush over the same area, however, it became instantly darker and smoothed out nicely.
If you are familiar with how watercolor paints work, then you will be delighted to find that this medium handles the same way in its wet form. The less water you add to the brush, the darker the tone will be. The more water you add, the lighter the tone gets and becomes easier to spread around the paper evenly. Keep in mind, just like watercolor paint, as soon as this medium gets wet, it becomes permanent. So, in the areas that I got wet, I was no longer able to erase like I would with regular graphite. Since I was using toned paper, I used a white VeriThin Prismacolor pencil to shade in the highlights. This worked very well on top of the areas that I applied water (after it dried, of course).
In conclusion, these watersoluble graphite pencils were easy to use and made the drawing process go a lot quicker than using a blending stump, like I normally do. In their dry form, they handle almost identical to typical graphite pencils (with the exception of being able to build up densely dark tones). In their wet form, they handle almost identical to typical watercolor paints. So, once you get the drawing wet, be prepared for everything to become permanent.
Feel free to check out my time-lapsed demo video of me using this product at: [...]