To provide a resist pattern improving material, containing: water; and benzalkonium chloride represented by the following general formula :where n is an integer of 8 to 18. A cyclical readout gradient is then played along the excited column’s axis while the magnetic resonance signal is continuously sampled to create a 2D sample set of velocity frequency vs. The seat back actuator is responsive to actuation to allow the seat back of the vehicle seat to be moved relative to the seat bottom, and is responsive to release thereof to block movement of the seat back relative to the seat bottom.