A paint brush protecting cover using a series of folding flaps. The second impurity layer is disposed in a region between the photoelectric conversion section and the amplifying section. Each block }i) is of size and is related to a unit vector }i). A plurality of subsystems located on the server system side of the on-line VBI system provide services related to purchasing, accounting, and printing of VBI. The method includes the steps for removing unwanted hydrogen bonds by exposing the hydrogen bonds to ultraviolet radiation sufficient to break the bond and annealing in an atmosphere comprising at least one gas having at least one atom capable of forming bonds that replace the hydrogen bonds.