In architecture cross sections are used to explain how a building is thought of and how it is has to be constructed or put together.
It is a means of communicating that although not actually represented in the building itself let alone visible after the construction process is finished, determines the character of a building to a great extend. Rolf is fascinated by the phenomenon of this 'hidden' reality and wants to use and bring to surface the cross section as an autonomous esthetic element in his furniture designs. He does that for instance with his sawing actions but also in different ways.
In the series 'Cutting Porcelain' teapots an kitschy vases are being poured into concrete to be cut open in half afterwards. The often beautiful cross section and interior is thus being exposed while at the same time the outside becomes distracted from the eye. By cutting the same type of teapot in half, in two different ways, two totally different shapes emerge that are both very characteristic and to a certain, but different degree, recognizable for the shape of a classic teapot.