A color electrophotographic image forming apparatus includes a plurality of electrophotographic photosensitive drums configured to develop images, an intermediary transfer member onto which developed images are transferred, and an image forming unit having a plurality of cartridge mounting portions for demountably mounting cartridges. The first access device includes a camera, a processor and a display of digital body map having an anatomical marker. The method allows dopant gas and vapors to be distributed in such a way as to cause efficient reaction of dopant gas or vapor molecules with electrons created by a filament contained in the arc chamber. 00\xd7103 ; and c) a G\u2032 versus 12 relationship: G\u2032>C+D, where C=127.