On the one hand great, on the other hand they adhere too strongly on contact paper

Tafelfolie there already longer, now there is this practically designed as circles.
The package includes 24 labels. They can be marked with chalk (this blurring of course, if you plan summarizes) or a crayon. He looks like a conventional white colored pencil, but is washable.
Chalk on the blackboard foil white as a chalk, this is it fine.
The labels stick permanently, but not too strong. Of plastic they can be easily removed again (but not re-use).
The durable adhesion is unfortunately also true for the contact paper. The labels stick so well that this tears, that it tears off a whole layer, you then must abpopeln again. Therefore, there are unfortunately only 3 stars because that's just annoying and should not be.