WOW!
There is a learning curve, but these are nice!  Quick and easy once you get the hang of stamping properly.  My daughter and I tried it out on our hand first and it did not wash off with water, not even soap easily.  It is a nice dark black pigment and smudge-proof once dried, of course.  My teen daughter usually is allergic to most products, but this one seems to not have bothered her very much.  The price is great for such a good product.
Rating: 5 stars