Ink Refill Kit for HP 40 Color Cartridges (51640C, 51640M, 51640Y) Resetters BCH's solution will need 1

BCH's solution will need 1 hour (green and white) to 12 hours (red) to work on the clog

and poor print quality

you can apply for a tester's account via email support@bchtechnologies

particularly for complicated products like this

Draw air out from the output (4) with a syringe

Ink Refill Kit for HP 40 Color Cartridges (51640C, 51640M, 51640Y) Resetters BCH's solution will need 13 x 15 ml of C M Y each + Air balancing Clip Video: How to master HP 15, 40, 45 Ink Refill Cartridge type Ink selection Refill procedure in details Troubleshooting How to refill HP 40 (51640) Cartridges Step 1. Flip the cartridge upside down, and you will see a black sticker covering a refill hole. Remove the black sticker, and you will see a steel bearing sealing the refill hole. Push the ball down into the cartridge with the supplied accessory. Our