In paste extrusion, the PTFE is pressed onto the conductor under high pressure in a discontinuous process. Before the PTFE can be used in the paste extruder, a molded part (a so-called dummy) must first be produced. For this purpose, the PTFE powder is pre-mixed together with a lubricant and the pigment and compressed. These cylindrical dolls are filled into the paste extruder and pressed onto the conductor. The conductor is then sintered at very high temperatures. In this sintering process, known from ceramics, the compacted powder particles sinter together to form a homogeneous structure.