cli-521 problem or not

[passenger]

I have an oem cyan cartridge, but without sticker that is originally on top...

Can I refill this cartridge and apply in printer without any problems (leaking or poor ink flow)?
Or that sticker on top has it's own purpose considering that vent hole and air channel? Should I stick some duct tape on top?

Thank you

 

[ghwellsjr]

Yes, you should have tape covering the serpentine air path but leave an opening at the end. This path is important to keep the ink from drying out in the sponge compartment.

 

[passenger]

I should tape it like this black cartridge?
Electric tape should be fine?

Can you tell which is the vent hole, looking from right to left?

 

[ghwellsjr]

See this link for a complete discussion about the air vent.

The vent that goes down into the cartridge is the middle of the three circular depressions.

 

[stratman]

See this link for a complete discussion about the air vent.

The vent that goes down into the cartridge is the middle of the three circular depressions.

There appears to be 5 circular depressions on the top of the cartridge.