Copy Quality Improvement Through Selective Transfer

A method called Selective Transfer may reduce or eliminate background in xerographic copies. Background, or toner deposited in nonimage areas, has always been a problem in xerography. Adjusting development parameters can help keep background at relatively low levels, but the emphasis on higher speeds and solid area development in the newer machines puts practical limits on background reduction. Previous efforts to reduce background have concentrated on two general techniques: 1) nondevelopment of background, and 2) processes for selective fusing combined with abrasive cleanup.