The wire should then be burnished to remove any film left on by the alcohol, or unremoved oxide. The wire should then be tested for continuity by placing one end of a multitester on the contact, while running the other end slowly along the entire length of the wire. The meter should give a zero reading without fluxuating during this process. If the meter drops at any point, burnish that area of the corona wire again. If you continue to get fluxuations, replace the corona assembly or re-string the wire.
Gold plated wire is the preferred method for re-stringing.
It provides a better conductor, and is less susceptible to oxidation. The Drum Should first be cleaned with water or peroxide. Depending upon the type of drum being cleaned, scuffs and minor scratches may sometimes be removed. The seal prevents the toner from seeping from the hopper during transportation. Some cartridges are very tightly constructed and require no seal during transportation, but most do.