Toner cartridges are usually packed in kraft paper corrugated boxes. In addition, the selenium drum is also packed in inflatable bubble bags and PE plastic bags. Generally speaking, the box is clean and there will be no visible toner deposition. If they are too dirty, you won't use them to wash clothes. The amount of toner in the box is very small, and the influence of dust is greater than this. Contact with such an amount will not cause adverse effects.
However, some toner will remain in the box filled with toner cartridges, because the particles of toner are very small, ranging from hundreds of nanometers to several microns.
The main component of toner is not carbon, but mainly composed of resin, carbon black, charging agent and magnetic powder. Toner can cause irritation to human mucosa, easily increase the incidence of asthma or nasal allergy, and even appear dizziness, vomiting and other symptoms. Because it is clothes, it will come into contact with the skin, some people will be allergic to it, and toner will adhere to the skin, which is unhealthy. If you put clothes, you need to wash them before wearing them. There will be no problem.