There is described an image forming apparatus for forming a high-density image by using the reversal developing method and suppressing an occurrence of irregularities. A multi-plane dumping command is received after the first data is received, and a command and an address for a program operation of a second plane are received. Such a filler can be prepared from a source material containing cellulose or lignocellulose fibrils by first forming a fibril suspension, into which there are fed source materials forming an inorganic or organic salt that, when precipitating, forms a light-scattering pigment. For example, when power failure is detected, the ASIC can read the data from the DIMM socket using power supplied from the alternate power source and write that data to a persistent storage device.