In contrast to, for example, oil paints, a primer can be dispensed with when painting with acrylic paints. Acrylic paints can be applied to almost any solid and grease-free surface. At the same time they are characterized by the short drying time. Even if a painting base is used, which absorbs the colors strongly, the acrylic binder remains in the colors. Therefore, the acrylics dry to a stable and durable color film. However, the colors on an untreated painting ground behave a little differently than on a ground with primer. In addition, the surface structure and the coloring of the ground influence the subsequent image effect. Especially with landscape paintings and abstract paintings, but also when creating color gradients, this effect is often deliberately used.