It mainly contains carbon, lead, mercury, cadmium, hexavalent chromium, polybrominated diphenyl ether (PBB) and polybrominated diphenyl ether (PBDE).

Second, it pollutes the environment.

According to statistics, more than 45 million ink cartridges and 4 million toner cartridges were discarded nationwide last year, with a total volume of more than 400,000 cubic meters. If these discarded consumables are put into the train carriages, it can completely fill 5000 carriages. In Hong Kong, discarded laser toner cartridges occupy 660,000 hectares of landfills every year. It is enough to pile up these waste consumables into a mountain, but it is difficult to decompose after being buried underground for hundreds of years. These non-degradable waste consumables not only cause amazing waste of resources, but also threaten people's living environment. Therefore, it is urgent to develop "green consumables".

In overseas, Europe and the United States and other economically developed areas, the use of environmentally friendly toner cartridges has become a very common practice. According to foreign professional recycling magazines, in Europe and America, seven out of every ten selenium drums belong to environmentally-friendly recycling products. In the United States, there are more than 80,000 enterprises engaged in the manufacture of environmentally-friendly toner cartridges, and environmentally-friendly toner cartridges have become the mainstream of the market. Many states have special laws to promote the development of environmentally-friendly recycled products, and the associations of environmentally-friendly recycled products are dotted and full of vitality. Since 1993, the U.S. government has been purchasing products that meet the requirements of environmental protection when updating office equipment. The updated personal computers are all green products with the energy star logo, which can be recycled, saving 20% power consumption. Japan and Europe are developing environmentally-friendly cars, the German market is developing environmentally-friendly TVs, the Dutch construction industry plans to build environmentally-friendly houses, Japan plans to build green ports, and American youth like to wear clothes and shoes made of recycled waste. Europe is also developing environmentally friendly clothing, and green food is popular all over the world. Chicago Board of Trade launched junk futures, allowing recyclable garbage to be traded with treasury grain futures. The so-called environmental protection toner cartridge is simply a toner cartridge that can be reused after a series of treatments. It is called environmental protection selenium drum because it mainly uses the plastic shell and spare parts of the old selenium drum. The original product was designed with the intention of recycling. Plastic shell, photosensitive drum, charging roller, magnetic roller and other accessories can be recycled for 3 or 4 times, thus avoiding environmental pollution. Environmental protection selenium drum as a product. Its appearance and development is not only a commercial behavior, but also its business behavior and its business philosophy: to make products with quality completely meeting the requirements of users and make contributions to environmental protection and improvement. According to the survey, at present, more than 75% users in China are willing to use environmentally friendly toner cartridges, while only 15% users actually use environmentally friendly toner cartridges. More than 60% users are interested in using environmentally friendly toner cartridges, but they don't use environmentally friendly toner cartridges because they don't know much about product quality and price. In the future, with the improvement of environmental protection product policy, the improvement of user acceptance and the popularization of laser printers, more than 60% of the user market will bring us billions of markets in a few years, which will increase tenfold on the basis of the existing market. Generally speaking, at present, the domestic market of environmentally-friendly recycled toner cartridges accounts for a small proportion in the whole consumable market. In order to penetrate into the original market and further expand the market, the environmental protection toner cartridge market must rely on brand products comparable to the original products, and succeed in the environmental protection toner cartridge market with high quality and excellent service.