An image forming apparatus which forms an image onto a recording medium using a liquid developer which contains an insulation liquid and toner particles dispersed in the insulation liquid is provided. The storing of credits can alter one or more records of a credit account. A hologram recording material comprising: an organometallic compound at least containing at least two kinds of metals, oxygen, and an aromatic group, and having an organometallic unit wherein two aromatic groups are bonded directly to one metal; metal oxide fine particles; and a photopolymerizable compound. The envelope protects the cylinder from direct contact with the frame to prevent friction or vibration damage to the cylinder while fixing the position of the cylinder in the interior cabin for the safety of surrounding passengers in the event of turbulence. The bearing assembly surrounds at least a portion of the shaft. In a manufacturing method of an electrode sheet for the electrical double layer capacitor, continuous drying and vacuum drying are performed in a drying process.