Improvement on the qualities of photosensitive members with cold sealing

Organic photo-conductor (OPC) drum used in a laser printer comprises photosensitive substrates including an anodized layer formed on the surface of an aluminum or aluminum alloy base. Hot sealing method has been dominantly used to seal the pores of anodized aluminum of OPC drum. Cold sealing procedure has been applied to enhance the sealing quality of OPC drum and the result showed that cold sealing method is more effective than hot sealing when the pore size is extremely small. As a result, defects such as spots on the printed images, smudges and cracks on the surface of OPC drum have been removed. Adhesion strength between photosensitive layers and the surface of anodized aluminum has greatly increased with improvement of sealing quality.