All products go through as following professional test before leaving the factory

1) . Mechanical test to ensure the toners smooth operation and no noise, and to meet with ISO standards.

2) . Environment protection test to ensure toners environmental safe.

3) . Duration test to ensure toners can last more than one year.

4) . Difficult conditions tests such as abnormal temperature, air pressure, strong sun light and rough transportations tests to ensure the printing quality remains high.

5) . Water resistant test to ensure printing won't fade and be diluted when wet.

6) . Printing quality test to ensure the printing is real black, no slur and won't fade.

7) . Capacity test to ensure the print volume is the same as the ones of original manufacturers