Apparatus for forming wide paint film parts includes a frame; and, attached to the frame, at least two paint film stock grasping members, which generally oppose one another, which can grasp deformable paint film stock, at least one of which can be moved apart from the other while the stock is grasped. In the connecting housing, the carrier is connected via a plug connection with the connection board for transmitting the heating current. -% and is of the formula 1wherein R is hydrogen, C1-C6 alkyl, CHCHCOOH or 2B is present in an amount of 5 to 35 wt.