The steps for adding ink to the printer cartridge are as follows:

Open the cartridge shield or hatch, wait for the cartridge to move to the middle position, press down on the top of the cartridge to remove it, taking care not to touch the chip on the cartridge.Tear off part of the label on the cartridge to reveal the ink injection hole, be careful not to remove all of it to avoid damaging the label.

Use a syringe to extract the appropriate amount of ink, pay attention to different colors of ink should be extracted with different syringes, avoid mixing.

Insert the syringe needle into the ink injection hole and slowly fill the ink, taking care not to overfill at one time to avoid overflow.

After filling the ink, remove the syringe needle, wipe the ink at the bottom of the cartridge and around the ink injection hole with a paper towel, and attach the label.

Place the filled cartridges back into the printer and install them in reverse order, making sure the cartridges are facing inwards, and then close the hatch or shield.

Test the printer effect to ensure successful inking.

Note: In the inking process to avoid ink splashed on the skin or eyes, if accidentally splashed, please immediately rinse with water and timely medical treatment. In addition, different brands and models of printer cartridges may be slightly different inking methods, it is recommended to refer to the printer manual or consult a professional for operation.