Toner (also known as toner) is mainly composed of resin, carbon black, charging agent and magnetic powder instead of carbon.

Carbon powder melts into paper fibers at high temperature, and resin is oxidized into gas with pungent smell, which is what everyone calls' ozone'.

Many toner cartridges can be reused after the original toner is used up, so there are separate toners on the market. By adding toner, the use cost of user consumables will be greatly reduced.