A bandstop filter method and system for suppressing ASE noise is disclosed. In addition, an image forming apparatus provided with the fixing apparatus for preventing an occurrence of image failure even in a case where a coated paper sheet, which is most likely to cause the image failure, is used as a recording material and for enlarging a scope of application of the recording material while maintaining a productivity, to thereby attain an improved merchantability. A method is also provided that includes exposing a germanium-containing dielectric layer to liquid or gaseous H2O to alter the thickness and chemical composition of the layer. The image transfer electrode roller is brought to one of different positions along a transport direction of the printing sheet selected according to information on properties of the printing sheet and transfers the toner image onto the printing sheet at that position. The use of visually-differentiated emphasis to display similarities and differences can take a variety of forms, including color-coded highlighting of text, underlining, circling, or the insertion of graphical symbols. will be input to their right ears, and thus their left cerebral hemispheres.