A lot of work and patience

The chalk in itself makes fun, the application is very expensive. The "mess" this can be quite loose wipe away, so for me is not the issue. It is best to fan the hair really wide and edit the strands individually and coloring, best with hair clips and / or aluminum foil. This takes time and patience. Colors are a "tuft" hair one, they can afterwards no longer scour.
The result is even on dark hair very strong, looks on blond hair but somehow nicer.
With a flat iron can be the whole thing carefully (!) Fix. Keeps at least until the next hair wash.
The colors are beautiful and strong. But the chalk increases if properly applied quickly.
Conclusion: A nice fun for kids and good alternative for coloring!