These are not painted on but infact use a complete layer of EVA foam to give the target a striking appearance.
While the center is not intended to replace the paper faces used by all archers, it will afford some cheap practise without filling your bin with shot out paper faces.
These centers are available in 25cm and 16cm only and come in both 4 and 6 layer with the usual layers of high density EVA between the softer material.