1.Over 18 years experience. Highly professional R&D team and well-equipped lab & production facilities;

2.All the production ,we 100% testing on printer ,it is working fine ,then we packed;

3.When you change the product ,please make sure printer is OK;

4.All our ink is never hurt the printer head;

5.1:1 replacement of quality problem ink;

6.Thoroughly clean the printer and the print head before replacing the new ink.