How to criteria the good and bad Toner?

The two main criteria for good and bad Toner are blackness and resolution. Users subjectively always hope that the Toner blackness is good and the resolution is high. But blackness and resolution are contradictory. That is to say, if the black level is good, the resolution will be low; conversely, if the resolution is high, the black level will decrease. The Toner meets your requirements for clear printed documents, and at the same time provides you with excellent blackness, which is very good in the combination of blackness and resolution. Poor-quality Toner is mainly reflected in the uneven thickness of Powder particles, insufficient blackness, low resolution, poor expansion when shaking, and easy to agglomerate due to the influence of external temperature or humidity.The above is the way to criteria the Toner is good or bad.