Because the drum unit is very important part in the printer, it is good or bad will affect the ( 影响) To the quality of the print. Color is used in the paper in the laser printer toner fixing powder material. Black toner by bonding resin, carbon black, electronic agents, additives such as ingredients. Still need to add other color in the color toner pigment, etc. Carbon powder polymerization toner used widely, because of the high cost, mainly used in the production of color toner. Under normal circumstances, the original packaging printer drum unit with a special design of protection, as far as possible to provide a long storage time. In addition to the seal, was also special adhesive tape to seal, to production, 生产) Date calculations, a stored in sealed packaging drum unit of average life expectancy of about two and a half years. But when seal was damaged, toner supply manufacturers recommended storage and use a total of six months, while in storage has opened the sealed packaging drum unit should remember the following: one, from packaging to take out the selenium ( 硒) The drum must be finished within six months. Because after six months, drum unit of the performance of each component becomes unstable, Explanation: solid stability; There is no change) And the print quality will decline, 上上下下) , drop depends on the environment. Second, avoid selenium ( 硒) Drum under direct sunlight or in the window. In the hot season, don't place the drum unit for a long time in the car. Three, avoid temperature ( 温度) The dramatic changes and humidity environment, such as air conditioning or heating. Printer toner many drums in original toner after use, the user can add after used again, so also is to have separate toner for sale on the market. By adding toner by oneself, will reduce the use of the user supplies cost. Four, avoid dust environment, or close to corrosive chemicals, such as ammonia steam or organic solvents. Five, it is forbidden to selenium ( 硒) Drum exposure to 104 ° f ( 40℃） The above environment.