A method by which, in an optical disk recording and reproducing device, the time required for a test recording performed prior to an actual information recording can be reduced according to characteristics of an optical disk. In dysphagia, every swallowing attempt bears the danger of choking and aspiration of liquids or food particles into the lung. The first end is relatively rigid in comparison to the more flexible second end. Another embodiment of the invention relates to forming a flexible display along a flexible reflective substrate. The compositions are best suited as a chemically amplified positive resist material for micropatterning in the manufacture of VLSI. With this configuration, the present invention provides the circulation pump circulating washing water in the heating tank, thereby preventing the washing from oxidizing, improving a washing efficiency especially improving a washing efficiency according to washing material, and saving washing water.